blob: 4b81e78283f0097d8f550fe0d7caf9568a4ff8af [file] [log] [blame]
Rusty Russell5eed48a2000-06-02 20:12:24 +00001/* 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 *
Harald Welte10a907f2002-08-07 09:07:41 +00006 * (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 *
Rusty Russell5eed48a2000-06-02 20:12:24 +000013 * 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 <dlfcn.h>
35#include <ctype.h>
36#include <stdarg.h>
37#include <limits.h>
38#include <ip6tables.h>
39#include <arpa/inet.h>
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +000040#include <unistd.h>
41#include <fcntl.h>
42#include <sys/wait.h>
43#include <sys/types.h>
44#include <sys/socket.h>
Rusty Russell5eed48a2000-06-02 20:12:24 +000045
46#ifndef TRUE
47#define TRUE 1
48#endif
49#ifndef FALSE
50#define FALSE 0
51#endif
52
53#ifndef IP6T_LIB_DIR
54#define IP6T_LIB_DIR "/usr/local/lib/iptables"
55#endif
56
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +000057#ifndef PROC_SYS_MODPROBE
58#define PROC_SYS_MODPROBE "/proc/sys/kernel/modprobe"
59#endif
60
Rusty Russell5eed48a2000-06-02 20:12:24 +000061#define FMT_NUMERIC 0x0001
62#define FMT_NOCOUNTS 0x0002
63#define FMT_KILOMEGAGIGA 0x0004
64#define FMT_OPTIONS 0x0008
65#define FMT_NOTABLE 0x0010
66#define FMT_NOTARGET 0x0020
67#define FMT_VIA 0x0040
68#define FMT_NONEWLINE 0x0080
69#define FMT_LINENUMBERS 0x0100
70
71#define FMT_PRINT_RULE (FMT_NOCOUNTS | FMT_OPTIONS | FMT_VIA \
72 | FMT_NUMERIC | FMT_NOTABLE)
73#define FMT(tab,notab) ((format) & FMT_NOTABLE ? (notab) : (tab))
74
75
76#define CMD_NONE 0x0000U
77#define CMD_INSERT 0x0001U
78#define CMD_DELETE 0x0002U
79#define CMD_DELETE_NUM 0x0004U
80#define CMD_REPLACE 0x0008U
81#define CMD_APPEND 0x0010U
82#define CMD_LIST 0x0020U
83#define CMD_FLUSH 0x0040U
84#define CMD_ZERO 0x0080U
85#define CMD_NEW_CHAIN 0x0100U
86#define CMD_DELETE_CHAIN 0x0200U
87#define CMD_SET_POLICY 0x0400U
88#define CMD_CHECK 0x0800U
89#define CMD_RENAME_CHAIN 0x1000U
90#define NUMBER_OF_CMD 13
91static const char cmdflags[] = { 'I', 'D', 'D', 'R', 'A', 'L', 'F', 'Z',
András Kis-Szabó0c4188f2002-08-14 11:40:41 +000092 'N', 'X', 'P', 'E' };
Rusty Russell5eed48a2000-06-02 20:12:24 +000093
94#define OPTION_OFFSET 256
95
96#define OPT_NONE 0x00000U
97#define OPT_NUMERIC 0x00001U
98#define OPT_SOURCE 0x00002U
99#define OPT_DESTINATION 0x00004U
100#define OPT_PROTOCOL 0x00008U
101#define OPT_JUMP 0x00010U
102#define OPT_VERBOSE 0x00020U
103#define OPT_EXPANDED 0x00040U
104#define OPT_VIANAMEIN 0x00080U
105#define OPT_VIANAMEOUT 0x00100U
106#define OPT_LINENUMBERS 0x00200U
Harald Welte43ac1912002-03-03 09:43:07 +0000107#define OPT_COUNTERS 0x00400U
108#define NUMBER_OF_OPT 11
Rusty Russell5eed48a2000-06-02 20:12:24 +0000109static const char optflags[NUMBER_OF_OPT]
Harald Welte43ac1912002-03-03 09:43:07 +0000110= { 'n', 's', 'd', 'p', 'j', 'v', 'x', 'i', 'o', '3', 'c'};
Rusty Russell5eed48a2000-06-02 20:12:24 +0000111
112static struct option original_opts[] = {
113 { "append", 1, 0, 'A' },
114 { "delete", 1, 0, 'D' },
115 { "insert", 1, 0, 'I' },
116 { "replace", 1, 0, 'R' },
117 { "list", 2, 0, 'L' },
118 { "flush", 2, 0, 'F' },
119 { "zero", 2, 0, 'Z' },
Rusty Russell5eed48a2000-06-02 20:12:24 +0000120 { "new-chain", 1, 0, 'N' },
121 { "delete-chain", 2, 0, 'X' },
Harald Welte68ec9c72002-11-02 14:48:17 +0000122 { "rename-chain", 1, 0, 'E' },
Rusty Russell5eed48a2000-06-02 20:12:24 +0000123 { "policy", 1, 0, 'P' },
124 { "source", 1, 0, 's' },
125 { "destination", 1, 0, 'd' },
126 { "src", 1, 0, 's' }, /* synonym */
127 { "dst", 1, 0, 'd' }, /* synonym */
128 { "protocol", 1, 0, 'p' },
129 { "in-interface", 1, 0, 'i' },
130 { "jump", 1, 0, 'j' },
131 { "table", 1, 0, 't' },
132 { "match", 1, 0, 'm' },
133 { "numeric", 0, 0, 'n' },
134 { "out-interface", 1, 0, 'o' },
135 { "verbose", 0, 0, 'v' },
136 { "exact", 0, 0, 'x' },
137 { "version", 0, 0, 'V' },
138 { "help", 2, 0, 'h' },
139 { "line-numbers", 0, 0, '0' },
Harald Welte43ac1912002-03-03 09:43:07 +0000140 { "modprobe", 1, 0, 'M' },
141 { "set-counters", 1, 0, 'c' },
Rusty Russell5eed48a2000-06-02 20:12:24 +0000142 { 0 }
143};
144
Harald Weltea8658ca2003-03-05 07:46:15 +0000145/* we need this for ip6tables-restore. ip6tables-restore.c sets line to the
146 * current line of the input file, in order to give a more precise error
147 * message. ip6tables itself doesn't need this, so it is initialized to the
148 * magic number of -1 */
149int line = -1;
150
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +0000151#ifndef __OPTIMIZE__
152struct ip6t_entry_target *
Harald Weltef7eca1c2001-05-28 19:48:14 +0000153ip6t_get_target(struct ip6t_entry *e)
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +0000154{
András Kis-Szabó0c4188f2002-08-14 11:40:41 +0000155 return (void *)e + e->target_offset;
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +0000156}
157#endif
158
Rusty Russell5eed48a2000-06-02 20:12:24 +0000159static struct option *opts = original_opts;
160static unsigned int global_option_offset = 0;
161
162/* Table of legal combinations of commands and options. If any of the
163 * given commands make an option legal, that option is legal (applies to
164 * CMD_LIST and CMD_ZERO only).
165 * Key:
166 * + compulsory
167 * x illegal
168 * optional
169 */
170
171static char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] =
172/* Well, it's better than "Re: Linux vs FreeBSD" */
173{
174 /* -n -s -d -p -j -v -x -i -o --line */
175/*INSERT*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
176/*DELETE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
177/*DELETE_NUM*/{'x','x','x','x','x',' ','x','x','x','x'},
178/*REPLACE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
179/*APPEND*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
180/*LIST*/ {' ','x','x','x','x',' ',' ','x','x',' '},
181/*FLUSH*/ {'x','x','x','x','x',' ','x','x','x','x'},
182/*ZERO*/ {'x','x','x','x','x',' ','x','x','x','x'},
183/*NEW_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x'},
184/*DEL_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x'},
185/*SET_POLICY*/{'x','x','x','x','x',' ','x','x','x','x'},
Harald Welte43ac1912002-03-03 09:43:07 +0000186/*CHECK*/ {'x','+','+','+','x',' ','x',' ',' ','x'},
Rusty Russell5eed48a2000-06-02 20:12:24 +0000187/*RENAME*/ {'x','x','x','x','x',' ','x','x','x','x'}
188};
189
190static int inverse_for_options[NUMBER_OF_OPT] =
191{
192/* -n */ 0,
193/* -s */ IP6T_INV_SRCIP,
194/* -d */ IP6T_INV_DSTIP,
195/* -p */ IP6T_INV_PROTO,
196/* -j */ 0,
197/* -v */ 0,
198/* -x */ 0,
199/* -i */ IP6T_INV_VIA_IN,
200/* -o */ IP6T_INV_VIA_OUT,
201/*--line*/ 0
202};
203
204const char *program_version;
205const char *program_name;
206
207/* Keeping track of external matches and targets: linked lists. */
208struct ip6tables_match *ip6tables_matches = NULL;
209struct ip6tables_target *ip6tables_targets = NULL;
210
211/* Extra debugging from libiptc */
212extern void dump_entries6(const ip6tc_handle_t handle);
213
214/* A few hardcoded protocols for 'all' and in case the user has no
215 /etc/protocols */
216struct pprot {
217 char *name;
218 u_int8_t num;
219};
220
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +0000221/* Primitive headers... */
222/* defined in netinet/in.h */
223#if 0
224#ifndef IPPROTO_ESP
225#define IPPROTO_ESP 50
226#endif
227#ifndef IPPROTO_AH
228#define IPPROTO_AH 51
229#endif
230#endif
231
Rusty Russell5eed48a2000-06-02 20:12:24 +0000232static const struct pprot chain_protos[] = {
233 { "tcp", IPPROTO_TCP },
234 { "udp", IPPROTO_UDP },
Harald Weltede8e5fa2000-11-13 14:34:34 +0000235 { "icmpv6", IPPROTO_ICMPV6 },
András Kis-Szabó764316a2001-02-26 17:31:20 +0000236 { "esp", IPPROTO_ESP },
237 { "ah", IPPROTO_AH },
Rusty Russell5eed48a2000-06-02 20:12:24 +0000238 { "all", 0 },
239};
240
241static char *
242proto_to_name(u_int8_t proto, int nolookup)
243{
244 unsigned int i;
245
246 if (proto && !nolookup) {
247 struct protoent *pent = getprotobynumber(proto);
248 if (pent)
249 return pent->p_name;
250 }
251
252 for (i = 0; i < sizeof(chain_protos)/sizeof(struct pprot); i++)
253 if (chain_protos[i].num == proto)
254 return chain_protos[i].name;
255
256 return NULL;
257}
258
259static void
260in6addrcpy(struct in6_addr *dst, struct in6_addr *src)
261{
262 memcpy(dst, src, sizeof(struct in6_addr));
Harald Welte43ac1912002-03-03 09:43:07 +0000263 /* dst->s6_addr = src->s6_addr; */
Rusty Russell5eed48a2000-06-02 20:12:24 +0000264}
265
266void
267exit_error(enum exittype status, char *msg, ...)
268{
269 va_list args;
270
271 va_start(args, msg);
272 fprintf(stderr, "%s v%s: ", program_name, program_version);
273 vfprintf(stderr, msg, args);
274 va_end(args);
275 fprintf(stderr, "\n");
276 if (status == PARAMETER_PROBLEM)
277 exit_tryhelp(status);
278 if (status == VERSION_PROBLEM)
279 fprintf(stderr,
280 "Perhaps iptables or your kernel needs to be upgraded.\n");
281 exit(status);
282}
283
284void
285exit_tryhelp(int status)
286{
Harald Weltea8658ca2003-03-05 07:46:15 +0000287 if (line != -1)
288 fprintf(stderr, "Error occurred at line: %d\n", line);
Rusty Russell5eed48a2000-06-02 20:12:24 +0000289 fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n",
290 program_name, program_name );
291 exit(status);
292}
293
294void
Martin Josefsson66aea6f2004-05-26 15:41:54 +0000295exit_printhelp(struct ip6tables_rule_match *matches)
Rusty Russell5eed48a2000-06-02 20:12:24 +0000296{
Martin Josefsson66aea6f2004-05-26 15:41:54 +0000297 struct ip6tables_rule_match *matchp = NULL;
Rusty Russell5eed48a2000-06-02 20:12:24 +0000298 struct ip6tables_target *t = NULL;
299
300 printf("%s v%s\n\n"
András Kis-Szabó0c4188f2002-08-14 11:40:41 +0000301"Usage: %s -[AD] chain rule-specification [options]\n"
Rusty Russell5eed48a2000-06-02 20:12:24 +0000302" %s -[RI] chain rulenum rule-specification [options]\n"
303" %s -D chain rulenum [options]\n"
304" %s -[LFZ] [chain] [options]\n"
305" %s -[NX] chain\n"
306" %s -E old-chain-name new-chain-name\n"
307" %s -P chain target [options]\n"
308" %s -h (print this help information)\n\n",
309 program_name, program_version, program_name, program_name,
310 program_name, program_name, program_name, program_name,
311 program_name, program_name);
312
313 printf(
314"Commands:\n"
315"Either long or short options are allowed.\n"
316" --append -A chain Append to chain\n"
317" --delete -D chain Delete matching rule from chain\n"
318" --delete -D chain rulenum\n"
319" Delete rule rulenum (1 = first) from chain\n"
320" --insert -I chain [rulenum]\n"
321" Insert in chain as rulenum (default 1=first)\n"
322" --replace -R chain rulenum\n"
323" Replace rule rulenum (1 = first) in chain\n"
324" --list -L [chain] List the rules in a chain or all chains\n"
325" --flush -F [chain] Delete all rules in chain or all chains\n"
326" --zero -Z [chain] Zero counters in chain or all chains\n"
Rusty Russell5eed48a2000-06-02 20:12:24 +0000327" --new -N chain Create a new user-defined chain\n"
328" --delete-chain\n"
329" -X [chain] Delete a user-defined chain\n"
330" --policy -P chain target\n"
331" Change policy on chain to target\n"
332" --rename-chain\n"
333" -E old-chain new-chain\n"
334" Change chain name, (moving any references)\n"
335
336"Options:\n"
337" --proto -p [!] proto protocol: by number or name, eg. `tcp'\n"
338" --source -s [!] address[/mask]\n"
339" source specification\n"
340" --destination -d [!] address[/mask]\n"
341" destination specification\n"
342" --in-interface -i [!] input name[+]\n"
343" network interface name ([+] for wildcard)\n"
344" --jump -j target\n"
Harald Welte43ac1912002-03-03 09:43:07 +0000345" target for rule (may load target extension)\n"
346" --match -m match\n"
347" extended match (may load extension)\n"
Rusty Russell5eed48a2000-06-02 20:12:24 +0000348" --numeric -n numeric output of addresses and ports\n"
349" --out-interface -o [!] output name[+]\n"
350" network interface name ([+] for wildcard)\n"
351" --table -t table table to manipulate (default: `filter')\n"
352" --verbose -v verbose mode\n"
Harald Welte43ac1912002-03-03 09:43:07 +0000353" --line-numbers print line numbers when listing\n"
Rusty Russell5eed48a2000-06-02 20:12:24 +0000354" --exact -x expand numbers (display exact values)\n"
András Kis-Szabó058eaad2001-06-16 15:42:17 +0000355/*"[!] --fragment -f match second or further fragments only\n"*/
Harald Welte43ac1912002-03-03 09:43:07 +0000356" --modprobe=<command> try to insert modules using this command\n"
357" --set-counters PKTS BYTES set the counter during insert/append\n"
Rusty Russell5eed48a2000-06-02 20:12:24 +0000358"[!] --version -V print package version.\n");
359
360 /* Print out any special helps. A user might like to be able to add a --help
361 to the commandline, and see expected results. So we call help for all
Martin Josefsson66aea6f2004-05-26 15:41:54 +0000362 specified matches & targets */
363 for (t = ip6tables_targets; t; t = t->next) {
364 if (t->used) {
365 printf("\n");
366 t->help();
367 }
Rusty Russell5eed48a2000-06-02 20:12:24 +0000368 }
Martin Josefsson66aea6f2004-05-26 15:41:54 +0000369 for (matchp = matches; matchp; matchp = matchp->next) {
Rusty Russell5eed48a2000-06-02 20:12:24 +0000370 printf("\n");
Martin Josefsson66aea6f2004-05-26 15:41:54 +0000371 matchp->match->help();
Rusty Russell5eed48a2000-06-02 20:12:24 +0000372 }
373 exit(0);
374}
375
376static void
377generic_opt_check(int command, int options)
378{
379 int i, j, legal = 0;
380
381 /* Check that commands are valid with options. Complicated by the
382 * fact that if an option is legal with *any* command given, it is
383 * legal overall (ie. -z and -l).
384 */
385 for (i = 0; i < NUMBER_OF_OPT; i++) {
386 legal = 0; /* -1 => illegal, 1 => legal, 0 => undecided. */
387
388 for (j = 0; j < NUMBER_OF_CMD; j++) {
389 if (!(command & (1<<j)))
390 continue;
391
392 if (!(options & (1<<i))) {
393 if (commands_v_options[j][i] == '+')
394 exit_error(PARAMETER_PROBLEM,
395 "You need to supply the `-%c' "
396 "option for this command\n",
397 optflags[i]);
398 } else {
399 if (commands_v_options[j][i] != 'x')
400 legal = 1;
401 else if (legal == 0)
402 legal = -1;
403 }
404 }
405 if (legal == -1)
406 exit_error(PARAMETER_PROBLEM,
407 "Illegal option `-%c' with this command\n",
408 optflags[i]);
409 }
410}
411
412static char
413opt2char(int option)
414{
415 const char *ptr;
416 for (ptr = optflags; option > 1; option >>= 1, ptr++);
417
418 return *ptr;
419}
420
421static char
422cmd2char(int option)
423{
424 const char *ptr;
425 for (ptr = cmdflags; option > 1; option >>= 1, ptr++);
426
427 return *ptr;
428}
429
430static void
431add_command(int *cmd, const int newcmd, const int othercmds, int invert)
432{
433 if (invert)
434 exit_error(PARAMETER_PROBLEM, "unexpected ! flag");
435 if (*cmd & (~othercmds))
436 exit_error(PARAMETER_PROBLEM, "Can't use -%c with -%c\n",
437 cmd2char(newcmd), cmd2char(*cmd & (~othercmds)));
438 *cmd |= newcmd;
439}
440
441int
Harald Welteb77f1da2002-03-14 11:35:58 +0000442check_inverse(const char option[], int *invert, int *optind, int argc)
Rusty Russell5eed48a2000-06-02 20:12:24 +0000443{
444 if (option && strcmp(option, "!") == 0) {
445 if (*invert)
446 exit_error(PARAMETER_PROBLEM,
447 "Multiple `!' flags not allowed");
Rusty Russell5eed48a2000-06-02 20:12:24 +0000448 *invert = TRUE;
Harald Welteb77f1da2002-03-14 11:35:58 +0000449 if (optind) {
450 *optind = *optind+1;
451 if (argc && *optind > argc)
452 exit_error(PARAMETER_PROBLEM,
453 "no argument following `!'");
454 }
455
Rusty Russell5eed48a2000-06-02 20:12:24 +0000456 return TRUE;
457 }
458 return FALSE;
459}
460
461static void *
462fw_calloc(size_t count, size_t size)
463{
464 void *p;
465
466 if ((p = calloc(count, size)) == NULL) {
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +0000467 perror("ip6tables: calloc failed");
Rusty Russell5eed48a2000-06-02 20:12:24 +0000468 exit(1);
469 }
470 return p;
471}
472
473static void *
474fw_malloc(size_t size)
475{
476 void *p;
477
478 if ((p = malloc(size)) == NULL) {
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +0000479 perror("ip6tables: malloc failed");
Rusty Russell5eed48a2000-06-02 20:12:24 +0000480 exit(1);
481 }
482 return p;
483}
484
Rusty Russell5eed48a2000-06-02 20:12:24 +0000485static char *
486addr_to_numeric(const struct in6_addr *addrp)
487{
András Kis-Szabó058eaad2001-06-16 15:42:17 +0000488 /* 0000:0000:0000:0000:0000:000.000.000.000
489 * 0000:0000:0000:0000:0000:0000:0000:0000 */
András Kis-Szabó764316a2001-02-26 17:31:20 +0000490 static char buf[50+1];
András Kis-Szabó058eaad2001-06-16 15:42:17 +0000491 return (char *)inet_ntop(AF_INET6, addrp, buf, sizeof(buf));
Rusty Russell5eed48a2000-06-02 20:12:24 +0000492}
493
494static struct in6_addr *
495numeric_to_addr(const char *num)
496{
497 static struct in6_addr ap;
András Kis-Szabó058eaad2001-06-16 15:42:17 +0000498 int err;
499 if ((err=inet_pton(AF_INET6, num, &ap)) == 1)
Rusty Russell5eed48a2000-06-02 20:12:24 +0000500 return &ap;
András Kis-Szabó058eaad2001-06-16 15:42:17 +0000501#ifdef DEBUG
502 fprintf(stderr, "\nnumeric2addr: %d\n", err);
503#endif
Rusty Russell5eed48a2000-06-02 20:12:24 +0000504 return (struct in6_addr *)NULL;
505}
506
András Kis-Szabó058eaad2001-06-16 15:42:17 +0000507
508static struct in6_addr *
509host_to_addr(const char *name, unsigned int *naddr)
510{
511 struct addrinfo hints;
512 struct addrinfo *res;
513 static struct in6_addr *addr;
514 int err;
515
516 memset(&hints, 0, sizeof(hints));
517 hints.ai_flags=AI_CANONNAME;
518 hints.ai_family=AF_INET6;
519 hints.ai_socktype=SOCK_RAW;
520 hints.ai_protocol=41;
521 hints.ai_next=NULL;
522
523 *naddr = 0;
524 if ( (err=getaddrinfo(name, NULL, &hints, &res)) != 0 ){
525#ifdef DEBUG
526 fprintf(stderr,"Name2IP: %s\n",gai_strerror(err));
527#endif
528 return (struct in6_addr *) NULL;
529 } else {
530 if (res->ai_family != AF_INET6 ||
531 res->ai_addrlen != sizeof(struct sockaddr_in6))
532 return (struct in6_addr *) NULL;
533
534#ifdef DEBUG
535 fprintf(stderr, "resolved: len=%d %s ", res->ai_addrlen,
536 addr_to_numeric(&(((struct sockaddr_in6 *)res->ai_addr)->sin6_addr)));
537#endif
538 /* Get the first element of the address-chain */
539 addr = fw_calloc(1, sizeof(struct in6_addr));
540 in6addrcpy(addr, (struct in6_addr *)
541 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr);
542 freeaddrinfo(res);
543 *naddr = 1;
544 return addr;
545 }
546
547 return (struct in6_addr *) NULL;
548}
549
András Kis-Szabó058eaad2001-06-16 15:42:17 +0000550static char *
551addr_to_host(const struct in6_addr *addr)
552{
553 struct sockaddr_in6 saddr;
554 int err;
555 static char hostname[NI_MAXHOST];
556
557 memset(&saddr, 0, sizeof(struct sockaddr_in6));
558 in6addrcpy(&(saddr.sin6_addr),(struct in6_addr *)addr);
András Kis-Szabóed44b832001-06-27 02:21:45 +0000559 saddr.sin6_family = AF_INET6;
András Kis-Szabó058eaad2001-06-16 15:42:17 +0000560
561 if ( (err=getnameinfo((struct sockaddr *)&saddr,
562 sizeof(struct sockaddr_in6),
563 hostname, sizeof(hostname)-1,
564 NULL, 0, 0)) != 0 ){
565#ifdef DEBUG
566 fprintf(stderr,"IP2Name: %s\n",gai_strerror(err));
567#endif
568 return (char *) NULL;
569 } else {
570#ifdef DEBUG
571 fprintf (stderr, "\naddr2host: %s\n", hostname);
572#endif
573
574 return hostname;
575 }
576
577 return (char *) NULL;
578}
579
Rusty Russell5eed48a2000-06-02 20:12:24 +0000580static char *
581mask_to_numeric(const struct in6_addr *addrp)
582{
Harald Welte8a50ab82003-06-24 18:15:59 +0000583 static char buf[50+2];
Rusty Russell5eed48a2000-06-02 20:12:24 +0000584 int l = ipv6_prefix_length(addrp);
Harald Welte8a50ab82003-06-24 18:15:59 +0000585 if (l == -1) {
586 strcpy(buf, "/");
587 strcat(buf, addr_to_numeric(addrp));
588 return buf;
589 }
Harald Welte43ac1912002-03-03 09:43:07 +0000590 sprintf(buf, "/%d", l);
Rusty Russell5eed48a2000-06-02 20:12:24 +0000591 return buf;
592}
593
594static struct in6_addr *
595network_to_addr(const char *name)
596{
András Kis-Szabó058eaad2001-06-16 15:42:17 +0000597 /* abort();*/
598 /* TODO: not implemented yet, but the exception breaks the
599 * name resolvation */
600 return (struct in6_addr *)NULL;
Rusty Russell5eed48a2000-06-02 20:12:24 +0000601}
602
603static char *
604addr_to_anyname(const struct in6_addr *addr)
605{
606 char *name;
607
608 if ((name = addr_to_host(addr)) != NULL)
609 return name;
610
611 return addr_to_numeric(addr);
612}
613
614/*
615 * All functions starting with "parse" should succeed, otherwise
616 * the program fails.
617 * Most routines return pointers to static data that may change
618 * between calls to the same or other routines with a few exceptions:
619 * "host_to_addr", "parse_hostnetwork", and "parse_hostnetworkmask"
620 * return global static data.
621*/
622
623static struct in6_addr *
624parse_hostnetwork(const char *name, unsigned int *naddrs)
625{
626 struct in6_addr *addrp, *addrptmp;
627
628 if ((addrptmp = numeric_to_addr(name)) != NULL ||
629 (addrptmp = network_to_addr(name)) != NULL) {
630 addrp = fw_malloc(sizeof(struct in6_addr));
631 in6addrcpy(addrp, addrptmp);
632 *naddrs = 1;
633 return addrp;
634 }
635 if ((addrp = host_to_addr(name, naddrs)) != NULL)
636 return addrp;
637
638 exit_error(PARAMETER_PROBLEM, "host/network `%s' not found", name);
639}
640
641static struct in6_addr *
642parse_mask(char *mask)
643{
644 static struct in6_addr maskaddr;
645 struct in6_addr *addrp;
Harald Welteed498492001-07-23 01:24:22 +0000646 unsigned int bits;
Rusty Russell5eed48a2000-06-02 20:12:24 +0000647
648 if (mask == NULL) {
649 /* no mask at all defaults to 128 bits */
650 memset(&maskaddr, 0xff, sizeof maskaddr);
651 return &maskaddr;
652 }
653 if ((addrp = numeric_to_addr(mask)) != NULL)
654 return addrp;
Harald Welteed498492001-07-23 01:24:22 +0000655 if (string_to_number(mask, 0, 128, &bits) == -1)
Rusty Russell5eed48a2000-06-02 20:12:24 +0000656 exit_error(PARAMETER_PROBLEM,
657 "invalid mask `%s' specified", mask);
658 if (bits != 0) {
659 char *p = (char *)&maskaddr;
660 memset(p, 0xff, bits / 8);
661 memset(p + (bits / 8) + 1, 0, (128 - bits) / 8);
662 p[bits / 8] = 0xff << (8 - (bits & 7));
663 return &maskaddr;
664 }
665
666 memset(&maskaddr, 0, sizeof maskaddr);
667 return &maskaddr;
668}
669
Harald Welte43ac1912002-03-03 09:43:07 +0000670void
Rusty Russell5eed48a2000-06-02 20:12:24 +0000671parse_hostnetworkmask(const char *name, struct in6_addr **addrpp,
672 struct in6_addr *maskp, unsigned int *naddrs)
673{
674 struct in6_addr *addrp;
675 char buf[256];
676 char *p;
677 int i, j, n;
678
679 strncpy(buf, name, sizeof(buf) - 1);
Karsten Desler073df8f2004-01-31 15:33:55 +0000680 buf[sizeof(buf) - 1] = '\0';
Rusty Russell5eed48a2000-06-02 20:12:24 +0000681 if ((p = strrchr(buf, '/')) != NULL) {
682 *p = '\0';
683 addrp = parse_mask(p + 1);
684 } else
685 addrp = parse_mask(NULL);
686 in6addrcpy(maskp, addrp);
687
688 /* if a null mask is given, the name is ignored, like in "any/0" */
689 if (!memcmp(maskp, &in6addr_any, sizeof(in6addr_any)))
690 strcpy(buf, "::");
691
692 addrp = *addrpp = parse_hostnetwork(buf, naddrs);
693 n = *naddrs;
694 for (i = 0, j = 0; i < n; i++) {
695 int k;
696 for (k = 0; k < 4; k++)
697 addrp[j].in6_u.u6_addr32[k] &= maskp->in6_u.u6_addr32[k];
698 j++;
699 for (k = 0; k < j - 1; k++) {
András Kis-Szabó058eaad2001-06-16 15:42:17 +0000700 if (IN6_ARE_ADDR_EQUAL(&addrp[k], &addrp[j - 1])) {
Rusty Russell5eed48a2000-06-02 20:12:24 +0000701 (*naddrs)--;
702 j--;
703 break;
704 }
705 }
706 }
707}
708
709struct ip6tables_match *
Martin Josefsson69ac0e02004-02-02 20:02:10 +0000710find_match(const char *name, enum ip6t_tryload tryload, struct ip6tables_rule_match **matches)
Rusty Russell5eed48a2000-06-02 20:12:24 +0000711{
712 struct ip6tables_match *ptr;
Harald Weltecfaed1f2001-10-04 08:11:44 +0000713 int icmphack = 0;
714
715 /* This is ugly as hell. Nonetheless, there is no way of changing
716 * this without hurting backwards compatibility */
717 if ( (strcmp(name,"icmpv6") == 0) ||
718 (strcmp(name,"ipv6-icmp") == 0) ||
719 (strcmp(name,"icmp6") == 0) ) icmphack = 1;
720
721 if (!icmphack) {
722 for (ptr = ip6tables_matches; ptr; ptr = ptr->next) {
723 if (strcmp(name, ptr->name) == 0)
724 break;
725 }
726 } else {
727 for (ptr = ip6tables_matches; ptr; ptr = ptr->next) {
728 if (strcmp("icmp6", ptr->name) == 0)
729 break;
730 }
731 }
Rusty Russell5eed48a2000-06-02 20:12:24 +0000732
Harald Welte3efb6ea2001-08-06 18:50:21 +0000733#ifndef NO_SHARED_LIBS
Rusty Russell5eed48a2000-06-02 20:12:24 +0000734 if (!ptr && tryload != DONT_LOAD) {
735 char path[sizeof(IP6T_LIB_DIR) + sizeof("/libip6t_.so")
736 + strlen(name)];
Harald Weltecfaed1f2001-10-04 08:11:44 +0000737 if (!icmphack)
738 sprintf(path, IP6T_LIB_DIR "/libip6t_%s.so", name);
739 else
740 sprintf(path, IP6T_LIB_DIR "/libip6t_%s.so", "icmpv6");
Rusty Russell5eed48a2000-06-02 20:12:24 +0000741 if (dlopen(path, RTLD_NOW)) {
742 /* Found library. If it didn't register itself,
743 maybe they specified target as match. */
Martin Josefsson69ac0e02004-02-02 20:02:10 +0000744 ptr = find_match(name, DONT_LOAD, NULL);
Rusty Russell5eed48a2000-06-02 20:12:24 +0000745
746 if (!ptr)
747 exit_error(PARAMETER_PROBLEM,
748 "Couldn't load match `%s'\n",
749 name);
750 } else if (tryload == LOAD_MUST_SUCCEED)
751 exit_error(PARAMETER_PROBLEM,
Harald Welte43ac1912002-03-03 09:43:07 +0000752 "Couldn't load match `%s':%s\n",
753 name, dlerror());
Rusty Russell5eed48a2000-06-02 20:12:24 +0000754 }
Harald Welte3efb6ea2001-08-06 18:50:21 +0000755#else
756 if (ptr && !ptr->loaded) {
757 if (tryload != DONT_LOAD)
758 ptr->loaded = 1;
759 else
760 ptr = NULL;
761 }
Marc Boucher067477b2002-03-24 15:09:31 +0000762 if(!ptr && (tryload == LOAD_MUST_SUCCEED)) {
763 exit_error(PARAMETER_PROBLEM,
764 "Couldn't find match `%s'\n", name);
765 }
Harald Welte3efb6ea2001-08-06 18:50:21 +0000766#endif
Rusty Russell5eed48a2000-06-02 20:12:24 +0000767
Martin Josefsson69ac0e02004-02-02 20:02:10 +0000768 if (ptr && matches) {
769 struct ip6tables_rule_match **i;
770 struct ip6tables_rule_match *newentry;
771
772 newentry = fw_malloc(sizeof(struct ip6tables_rule_match));
773
774 for (i = matches; *i; i = &(*i)->next);
775 newentry->match = ptr;
776 newentry->next = NULL;
777 *i = newentry;
778 }
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +0000779
Rusty Russell5eed48a2000-06-02 20:12:24 +0000780 return ptr;
781}
782
783/* Christophe Burki wants `-p 6' to imply `-m tcp'. */
784static struct ip6tables_match *
Martin Josefsson69ac0e02004-02-02 20:02:10 +0000785find_proto(const char *pname, enum ip6t_tryload tryload, int nolookup, struct ip6tables_rule_match **matches)
Rusty Russell5eed48a2000-06-02 20:12:24 +0000786{
Harald Welteed498492001-07-23 01:24:22 +0000787 unsigned int proto;
Rusty Russell5eed48a2000-06-02 20:12:24 +0000788
Harald Welte43ac1912002-03-03 09:43:07 +0000789 if (string_to_number(pname, 0, 255, &proto) != -1) {
790 char *protoname = proto_to_name(proto, nolookup);
Rusty Russell5eed48a2000-06-02 20:12:24 +0000791
Harald Welte43ac1912002-03-03 09:43:07 +0000792 if (protoname)
Martin Josefsson69ac0e02004-02-02 20:02:10 +0000793 return find_match(protoname, tryload, matches);
Harald Welte43ac1912002-03-03 09:43:07 +0000794 } else
Martin Josefsson69ac0e02004-02-02 20:02:10 +0000795 return find_match(pname, tryload, matches);
Harald Welte43ac1912002-03-03 09:43:07 +0000796
797 return NULL;
Rusty Russell5eed48a2000-06-02 20:12:24 +0000798}
799
Harald Welte43ac1912002-03-03 09:43:07 +0000800u_int16_t
Rusty Russell5eed48a2000-06-02 20:12:24 +0000801parse_protocol(const char *s)
802{
Harald Welteed498492001-07-23 01:24:22 +0000803 unsigned int proto;
Rusty Russell5eed48a2000-06-02 20:12:24 +0000804
Harald Welteed498492001-07-23 01:24:22 +0000805 if (string_to_number(s, 0, 255, &proto) == -1) {
Rusty Russell5eed48a2000-06-02 20:12:24 +0000806 struct protoent *pent;
807
808 if ((pent = getprotobyname(s)))
809 proto = pent->p_proto;
810 else {
811 unsigned int i;
812 for (i = 0;
813 i < sizeof(chain_protos)/sizeof(struct pprot);
814 i++) {
815 if (strcmp(s, chain_protos[i].name) == 0) {
816 proto = chain_protos[i].num;
817 break;
818 }
819 }
820 if (i == sizeof(chain_protos)/sizeof(struct pprot))
821 exit_error(PARAMETER_PROBLEM,
822 "unknown protocol `%s' specified",
823 s);
824 }
825 }
826
827 return (u_int16_t)proto;
828}
829
830static void
831parse_interface(const char *arg, char *vianame, unsigned char *mask)
832{
833 int vialen = strlen(arg);
834 unsigned int i;
835
836 memset(mask, 0, IFNAMSIZ);
837 memset(vianame, 0, IFNAMSIZ);
838
839 if (vialen + 1 > IFNAMSIZ)
840 exit_error(PARAMETER_PROBLEM,
841 "interface name `%s' must be shorter than IFNAMSIZ"
842 " (%i)", arg, IFNAMSIZ-1);
843
844 strcpy(vianame, arg);
Ozgur AKAN3610deb2004-04-07 09:36:29 +0000845 if ((vialen == 0) || (vialen == 1 && vianame[0] == '+'))
Rusty Russell5eed48a2000-06-02 20:12:24 +0000846 memset(mask, 0, IFNAMSIZ);
847 else if (vianame[vialen - 1] == '+') {
848 memset(mask, 0xFF, vialen - 1);
849 memset(mask + vialen - 1, 0, IFNAMSIZ - vialen + 1);
Harald Welte43ac1912002-03-03 09:43:07 +0000850 /* Don't remove `+' here! -HW */
Rusty Russell5eed48a2000-06-02 20:12:24 +0000851 } else {
852 /* Include nul-terminator in match */
853 memset(mask, 0xFF, vialen + 1);
854 memset(mask + vialen + 1, 0, IFNAMSIZ - vialen - 1);
Harald Welte43ac1912002-03-03 09:43:07 +0000855 for (i = 0; vianame[i]; i++) {
856 if (!isalnum(vianame[i])
857 && vianame[i] != '_'
858 && vianame[i] != '.') {
859 printf("Warning: wierd character in interface"
860 " `%s' (No aliases, :, ! or *).\n",
861 vianame);
862 break;
863 }
Rusty Russell5eed48a2000-06-02 20:12:24 +0000864 }
865 }
866}
867
868/* Can't be zero. */
869static int
870parse_rulenumber(const char *rule)
871{
Harald Welte43ac1912002-03-03 09:43:07 +0000872 unsigned int rulenum;
Rusty Russell5eed48a2000-06-02 20:12:24 +0000873
Harald Welte43ac1912002-03-03 09:43:07 +0000874 if (string_to_number(rule, 1, INT_MAX, &rulenum) == -1)
Rusty Russell5eed48a2000-06-02 20:12:24 +0000875 exit_error(PARAMETER_PROBLEM,
876 "Invalid rule number `%s'", rule);
877
878 return rulenum;
879}
880
881static const char *
882parse_target(const char *targetname)
883{
884 const char *ptr;
885
886 if (strlen(targetname) < 1)
887 exit_error(PARAMETER_PROBLEM,
888 "Invalid target name (too short)");
889
890 if (strlen(targetname)+1 > sizeof(ip6t_chainlabel))
891 exit_error(PARAMETER_PROBLEM,
Martin Josefssona28d4952004-05-26 16:04:48 +0000892 "Invalid target name `%s' (%u chars max)",
893 targetname, (unsigned int)sizeof(ip6t_chainlabel)-1);
Rusty Russell5eed48a2000-06-02 20:12:24 +0000894
895 for (ptr = targetname; *ptr; ptr++)
896 if (isspace(*ptr))
897 exit_error(PARAMETER_PROBLEM,
898 "Invalid target name `%s'", targetname);
899 return targetname;
900}
901
902int
Martin Josefssonb105bc92004-05-26 15:54:49 +0000903string_to_number_ll(const char *s, unsigned long long min, unsigned long long max,
904 unsigned long long *ret)
Rusty Russell5eed48a2000-06-02 20:12:24 +0000905{
Martin Josefssonb105bc92004-05-26 15:54:49 +0000906 unsigned long long number;
Rusty Russell5eed48a2000-06-02 20:12:24 +0000907 char *end;
908
909 /* Handle hex, octal, etc. */
Harald Welteed498492001-07-23 01:24:22 +0000910 errno = 0;
Martin Josefssonb105bc92004-05-26 15:54:49 +0000911 number = strtoull(s, &end, 0);
Rusty Russell5eed48a2000-06-02 20:12:24 +0000912 if (*end == '\0' && end != s) {
913 /* we parsed a number, let's see if we want this */
Martin Josefssonb105bc92004-05-26 15:54:49 +0000914 if (errno != ERANGE && min <= number && (!max || number <= max)) {
Harald Welteed498492001-07-23 01:24:22 +0000915 *ret = number;
916 return 0;
Harald Welte43ac1912002-03-03 09:43:07 +0000917 }
Rusty Russell5eed48a2000-06-02 20:12:24 +0000918 }
919 return -1;
920}
921
Martin Josefssonb105bc92004-05-26 15:54:49 +0000922int
923string_to_number_l(const char *s, unsigned long min, unsigned long max,
924 unsigned long *ret)
925{
926 int result;
927 unsigned long long number;
928
929 result = string_to_number_ll(s, min, max, &number);
930 *ret = (unsigned long)number;
931
932 return result;
933}
934
935int string_to_number(const char *s, unsigned int min, unsigned int max,
936 unsigned int *ret)
937{
938 int result;
939 unsigned long number;
940
941 result = string_to_number_l(s, min, max, &number);
942 *ret = (unsigned int)number;
943
944 return result;
945}
946
Rusty Russell5eed48a2000-06-02 20:12:24 +0000947static void
948set_option(unsigned int *options, unsigned int option, u_int8_t *invflg,
949 int invert)
950{
951 if (*options & option)
952 exit_error(PARAMETER_PROBLEM, "multiple -%c flags not allowed",
953 opt2char(option));
954 *options |= option;
955
956 if (invert) {
957 unsigned int i;
958 for (i = 0; 1 << i != option; i++);
959
960 if (!inverse_for_options[i])
961 exit_error(PARAMETER_PROBLEM,
962 "cannot have ! before -%c",
963 opt2char(option));
964 *invflg |= inverse_for_options[i];
965 }
966}
967
968struct ip6tables_target *
969find_target(const char *name, enum ip6t_tryload tryload)
970{
971 struct ip6tables_target *ptr;
972
973 /* Standard target? */
974 if (strcmp(name, "") == 0
975 || strcmp(name, IP6TC_LABEL_ACCEPT) == 0
976 || strcmp(name, IP6TC_LABEL_DROP) == 0
977 || strcmp(name, IP6TC_LABEL_QUEUE) == 0
978 || strcmp(name, IP6TC_LABEL_RETURN) == 0)
979 name = "standard";
980
981 for (ptr = ip6tables_targets; ptr; ptr = ptr->next) {
982 if (strcmp(name, ptr->name) == 0)
983 break;
984 }
985
Harald Welte3efb6ea2001-08-06 18:50:21 +0000986#ifndef NO_SHARED_LIBS
Rusty Russell5eed48a2000-06-02 20:12:24 +0000987 if (!ptr && tryload != DONT_LOAD) {
988 char path[sizeof(IP6T_LIB_DIR) + sizeof("/libip6t_.so")
989 + strlen(name)];
990 sprintf(path, IP6T_LIB_DIR "/libip6t_%s.so", name);
991 if (dlopen(path, RTLD_NOW)) {
992 /* Found library. If it didn't register itself,
993 maybe they specified match as a target. */
994 ptr = find_target(name, DONT_LOAD);
995 if (!ptr)
996 exit_error(PARAMETER_PROBLEM,
997 "Couldn't load target `%s'\n",
998 name);
999 } else if (tryload == LOAD_MUST_SUCCEED)
1000 exit_error(PARAMETER_PROBLEM,
Harald Welte43ac1912002-03-03 09:43:07 +00001001 "Couldn't load target `%s':%s\n",
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001002 name, dlerror());
Rusty Russell5eed48a2000-06-02 20:12:24 +00001003 }
Harald Welte3efb6ea2001-08-06 18:50:21 +00001004#else
1005 if (ptr && !ptr->loaded) {
1006 if (tryload != DONT_LOAD)
1007 ptr->loaded = 1;
1008 else
1009 ptr = NULL;
1010 }
Marc Boucher067477b2002-03-24 15:09:31 +00001011 if(!ptr && (tryload == LOAD_MUST_SUCCEED)) {
1012 exit_error(PARAMETER_PROBLEM,
1013 "Couldn't find target `%s'\n", name);
1014 }
Harald Welte3efb6ea2001-08-06 18:50:21 +00001015#endif
Rusty Russell5eed48a2000-06-02 20:12:24 +00001016
Harald Welte43ac1912002-03-03 09:43:07 +00001017 if (ptr)
1018 ptr->used = 1;
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001019
Rusty Russell5eed48a2000-06-02 20:12:24 +00001020 return ptr;
1021}
1022
1023static struct option *
Jan Echternachaf8fe9e2000-08-27 07:41:39 +00001024merge_options(struct option *oldopts, const struct option *newopts,
Rusty Russell5eed48a2000-06-02 20:12:24 +00001025 unsigned int *option_offset)
1026{
1027 unsigned int num_old, num_new, i;
1028 struct option *merge;
1029
1030 for (num_old = 0; oldopts[num_old].name; num_old++);
1031 for (num_new = 0; newopts[num_new].name; num_new++);
1032
1033 global_option_offset += OPTION_OFFSET;
1034 *option_offset = global_option_offset;
1035
1036 merge = malloc(sizeof(struct option) * (num_new + num_old + 1));
1037 memcpy(merge, oldopts, num_old * sizeof(struct option));
1038 for (i = 0; i < num_new; i++) {
1039 merge[num_old + i] = newopts[i];
1040 merge[num_old + i].val += *option_offset;
1041 }
1042 memset(merge + num_old + num_new, 0, sizeof(struct option));
1043
1044 return merge;
1045}
1046
1047void
1048register_match6(struct ip6tables_match *me)
1049{
Harald Welte43ac1912002-03-03 09:43:07 +00001050 struct ip6tables_match **i;
1051
Rusty Russell5eed48a2000-06-02 20:12:24 +00001052 if (strcmp(me->version, program_version) != 0) {
1053 fprintf(stderr, "%s: match `%s' v%s (I'm v%s).\n",
1054 program_name, me->name, me->version, program_version);
1055 exit(1);
1056 }
1057
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001058 if (find_match(me->name, DONT_LOAD, NULL)) {
Rusty Russell5eed48a2000-06-02 20:12:24 +00001059 fprintf(stderr, "%s: match `%s' already registered.\n",
1060 program_name, me->name);
1061 exit(1);
1062 }
1063
Harald Welte43ac1912002-03-03 09:43:07 +00001064 if (me->size != IP6T_ALIGN(me->size)) {
1065 fprintf(stderr, "%s: match `%s' has invalid size %u.\n",
Martin Josefssona28d4952004-05-26 16:04:48 +00001066 program_name, me->name, (unsigned int)me->size);
Harald Welte43ac1912002-03-03 09:43:07 +00001067 exit(1);
1068 }
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001069
Harald Welte43ac1912002-03-03 09:43:07 +00001070 /* Append to list. */
1071 for (i = &ip6tables_matches; *i; i = &(*i)->next);
1072 me->next = NULL;
1073 *i = me;
1074
Rusty Russell5eed48a2000-06-02 20:12:24 +00001075 me->m = NULL;
1076 me->mflags = 0;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001077}
1078
1079void
1080register_target6(struct ip6tables_target *me)
1081{
1082 if (strcmp(me->version, program_version) != 0) {
1083 fprintf(stderr, "%s: target `%s' v%s (I'm v%s).\n",
1084 program_name, me->name, me->version, program_version);
1085 exit(1);
1086 }
1087
1088 if (find_target(me->name, DONT_LOAD)) {
1089 fprintf(stderr, "%s: target `%s' already registered.\n",
1090 program_name, me->name);
1091 exit(1);
1092 }
1093
Harald Welte43ac1912002-03-03 09:43:07 +00001094 if (me->size != IP6T_ALIGN(me->size)) {
1095 fprintf(stderr, "%s: target `%s' has invalid size %u.\n",
Martin Josefssona28d4952004-05-26 16:04:48 +00001096 program_name, me->name, (unsigned int)me->size);
Harald Welte43ac1912002-03-03 09:43:07 +00001097 exit(1);
1098 }
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001099
Rusty Russell5eed48a2000-06-02 20:12:24 +00001100 /* Prepend to list. */
1101 me->next = ip6tables_targets;
1102 ip6tables_targets = me;
1103 me->t = NULL;
1104 me->tflags = 0;
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001105}
1106
1107static void
1108print_num(u_int64_t number, unsigned int format)
1109{
Harald Welte43ac1912002-03-03 09:43:07 +00001110 if (format & FMT_KILOMEGAGIGA) {
1111 if (number > 99999) {
1112 number = (number + 500) / 1000;
1113 if (number > 9999) {
1114 number = (number + 500) / 1000;
1115 if (number > 9999) {
1116 number = (number + 500) / 1000;
1117 if (number > 9999) {
1118 number = (number + 500) / 1000;
Martin Josefssona28d4952004-05-26 16:04:48 +00001119 printf(FMT("%4lluT ","%lluT "), (unsigned long long)number);
Harald Welte43ac1912002-03-03 09:43:07 +00001120 }
Martin Josefssona28d4952004-05-26 16:04:48 +00001121 else printf(FMT("%4lluG ","%lluG "), (unsigned long long)number);
Harald Welte43ac1912002-03-03 09:43:07 +00001122 }
Martin Josefssona28d4952004-05-26 16:04:48 +00001123 else printf(FMT("%4lluM ","%lluM "), (unsigned long long)number);
Harald Welte43ac1912002-03-03 09:43:07 +00001124 } else
Martin Josefssona28d4952004-05-26 16:04:48 +00001125 printf(FMT("%4lluK ","%lluK "), (unsigned long long)number);
Harald Welte43ac1912002-03-03 09:43:07 +00001126 } else
Martin Josefssona28d4952004-05-26 16:04:48 +00001127 printf(FMT("%5llu ","%llu "), (unsigned long long)number);
Harald Welte43ac1912002-03-03 09:43:07 +00001128 } else
Martin Josefssona28d4952004-05-26 16:04:48 +00001129 printf(FMT("%8llu ","%llu "), (unsigned long long)number);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001130}
1131
Harald Welte43ac1912002-03-03 09:43:07 +00001132
Rusty Russell5eed48a2000-06-02 20:12:24 +00001133static void
1134print_header(unsigned int format, const char *chain, ip6tc_handle_t *handle)
1135{
1136 struct ip6t_counters counters;
1137 const char *pol = ip6tc_get_policy(chain, &counters, handle);
1138 printf("Chain %s", chain);
1139 if (pol) {
1140 printf(" (policy %s", pol);
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001141 if (!(format & FMT_NOCOUNTS)) {
Harald Welte43ac1912002-03-03 09:43:07 +00001142 fputc(' ', stdout);
1143 print_num(counters.pcnt, (format|FMT_NOTABLE));
1144 fputs("packets, ", stdout);
1145 print_num(counters.bcnt, (format|FMT_NOTABLE));
1146 fputs("bytes", stdout);
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001147 }
Rusty Russell5eed48a2000-06-02 20:12:24 +00001148 printf(")\n");
1149 } else {
1150 unsigned int refs;
1151 if (!ip6tc_get_references(&refs, chain, handle))
1152 printf(" (ERROR obtaining refs)\n");
1153 else
1154 printf(" (%u references)\n", refs);
1155 }
1156
1157 if (format & FMT_LINENUMBERS)
1158 printf(FMT("%-4s ", "%s "), "num");
1159 if (!(format & FMT_NOCOUNTS)) {
1160 if (format & FMT_KILOMEGAGIGA) {
1161 printf(FMT("%5s ","%s "), "pkts");
1162 printf(FMT("%5s ","%s "), "bytes");
1163 } else {
1164 printf(FMT("%8s ","%s "), "pkts");
1165 printf(FMT("%10s ","%s "), "bytes");
1166 }
1167 }
1168 if (!(format & FMT_NOTARGET))
1169 printf(FMT("%-9s ","%s "), "target");
1170 fputs(" prot ", stdout);
1171 if (format & FMT_OPTIONS)
1172 fputs("opt", stdout);
1173 if (format & FMT_VIA) {
1174 printf(FMT(" %-6s ","%s "), "in");
1175 printf(FMT("%-6s ","%s "), "out");
1176 }
1177 printf(FMT(" %-19s ","%s "), "source");
1178 printf(FMT(" %-19s "," %s "), "destination");
1179 printf("\n");
1180}
1181
Harald Welte43ac1912002-03-03 09:43:07 +00001182
Rusty Russell5eed48a2000-06-02 20:12:24 +00001183static int
1184print_match(const struct ip6t_entry_match *m,
1185 const struct ip6t_ip6 *ip,
1186 int numeric)
1187{
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001188 struct ip6tables_match *match = find_match(m->u.user.name, TRY_LOAD, NULL);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001189
1190 if (match) {
1191 if (match->print)
1192 match->print(ip, m, numeric);
Harald Welte43ac1912002-03-03 09:43:07 +00001193 else
1194 printf("%s ", match->name);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001195 } else {
1196 if (m->u.user.name[0])
1197 printf("UNKNOWN match `%s' ", m->u.user.name);
1198 }
1199 /* Don't stop iterating. */
1200 return 0;
1201}
1202
1203/* e is called `fw' here for hysterical raisins */
1204static void
1205print_firewall(const struct ip6t_entry *fw,
1206 const char *targname,
1207 unsigned int num,
1208 unsigned int format,
1209 const ip6tc_handle_t handle)
1210{
1211 struct ip6tables_target *target = NULL;
1212 const struct ip6t_entry_target *t;
1213 u_int8_t flags;
1214 char buf[BUFSIZ];
1215
Rusty Russell5eed48a2000-06-02 20:12:24 +00001216 if (!ip6tc_is_chain(targname, handle))
1217 target = find_target(targname, TRY_LOAD);
1218 else
1219 target = find_target(IP6T_STANDARD_TARGET, LOAD_MUST_SUCCEED);
1220
1221 t = ip6t_get_target((struct ip6t_entry *)fw);
1222 flags = fw->ipv6.flags;
1223
1224 if (format & FMT_LINENUMBERS)
1225 printf(FMT("%-4u ", "%u "), num+1);
1226
1227 if (!(format & FMT_NOCOUNTS)) {
1228 print_num(fw->counters.pcnt, format);
1229 print_num(fw->counters.bcnt, format);
1230 }
1231
1232 if (!(format & FMT_NOTARGET))
1233 printf(FMT("%-9s ", "%s "), targname);
1234
1235 fputc(fw->ipv6.invflags & IP6T_INV_PROTO ? '!' : ' ', stdout);
1236 {
Harald Welte43ac1912002-03-03 09:43:07 +00001237 char *pname = proto_to_name(fw->ipv6.proto, format&FMT_NUMERIC);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001238 if (pname)
1239 printf(FMT("%-5s", "%s "), pname);
1240 else
1241 printf(FMT("%-5hu", "%hu "), fw->ipv6.proto);
1242 }
1243
1244 if (format & FMT_OPTIONS) {
1245 if (format & FMT_NOTABLE)
1246 fputs("opt ", stdout);
Harald Welte43ac1912002-03-03 09:43:07 +00001247 fputc(' ', stdout); /* Invert flag of FRAG */
1248 fputc(' ', stdout); /* -f */
Rusty Russell5eed48a2000-06-02 20:12:24 +00001249 fputc(' ', stdout);
1250 }
1251
1252 if (format & FMT_VIA) {
1253 char iface[IFNAMSIZ+2];
1254
1255 if (fw->ipv6.invflags & IP6T_INV_VIA_IN) {
1256 iface[0] = '!';
1257 iface[1] = '\0';
1258 }
1259 else iface[0] = '\0';
1260
1261 if (fw->ipv6.iniface[0] != '\0') {
1262 strcat(iface, fw->ipv6.iniface);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001263 }
1264 else if (format & FMT_NUMERIC) strcat(iface, "*");
1265 else strcat(iface, "any");
1266 printf(FMT(" %-6s ","in %s "), iface);
1267
1268 if (fw->ipv6.invflags & IP6T_INV_VIA_OUT) {
1269 iface[0] = '!';
1270 iface[1] = '\0';
1271 }
1272 else iface[0] = '\0';
1273
1274 if (fw->ipv6.outiface[0] != '\0') {
1275 strcat(iface, fw->ipv6.outiface);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001276 }
1277 else if (format & FMT_NUMERIC) strcat(iface, "*");
1278 else strcat(iface, "any");
1279 printf(FMT("%-6s ","out %s "), iface);
1280 }
1281
1282 fputc(fw->ipv6.invflags & IP6T_INV_SRCIP ? '!' : ' ', stdout);
1283 if (!memcmp(&fw->ipv6.smsk, &in6addr_any, sizeof in6addr_any)
1284 && !(format & FMT_NUMERIC))
1285 printf(FMT("%-19s ","%s "), "anywhere");
1286 else {
1287 if (format & FMT_NUMERIC)
Harald Welte43ac1912002-03-03 09:43:07 +00001288 sprintf(buf, "%s", addr_to_numeric(&(fw->ipv6.src)));
Rusty Russell5eed48a2000-06-02 20:12:24 +00001289 else
Harald Welte43ac1912002-03-03 09:43:07 +00001290 sprintf(buf, "%s", addr_to_anyname(&(fw->ipv6.src)));
Rusty Russell5eed48a2000-06-02 20:12:24 +00001291 strcat(buf, mask_to_numeric(&(fw->ipv6.smsk)));
1292 printf(FMT("%-19s ","%s "), buf);
1293 }
1294
1295 fputc(fw->ipv6.invflags & IP6T_INV_DSTIP ? '!' : ' ', stdout);
1296 if (!memcmp(&fw->ipv6.dmsk, &in6addr_any, sizeof in6addr_any)
1297 && !(format & FMT_NUMERIC))
1298 printf(FMT("%-19s","-> %s"), "anywhere");
1299 else {
1300 if (format & FMT_NUMERIC)
Harald Welte43ac1912002-03-03 09:43:07 +00001301 sprintf(buf, "%s", addr_to_numeric(&(fw->ipv6.dst)));
Rusty Russell5eed48a2000-06-02 20:12:24 +00001302 else
Harald Welte43ac1912002-03-03 09:43:07 +00001303 sprintf(buf, "%s", addr_to_anyname(&(fw->ipv6.dst)));
Rusty Russell5eed48a2000-06-02 20:12:24 +00001304 strcat(buf, mask_to_numeric(&(fw->ipv6.dmsk)));
1305 printf(FMT("%-19s","-> %s"), buf);
1306 }
1307
1308 if (format & FMT_NOTABLE)
1309 fputs(" ", stdout);
1310
1311 IP6T_MATCH_ITERATE(fw, print_match, &fw->ipv6, format & FMT_NUMERIC);
1312
1313 if (target) {
1314 if (target->print)
1315 /* Print the target information. */
1316 target->print(&fw->ipv6, t, format & FMT_NUMERIC);
1317 } else if (t->u.target_size != sizeof(*t))
1318 printf("[%u bytes of unknown target data] ",
Martin Josefssona28d4952004-05-26 16:04:48 +00001319 (unsigned int)(t->u.target_size - sizeof(*t)));
Rusty Russell5eed48a2000-06-02 20:12:24 +00001320
1321 if (!(format & FMT_NONEWLINE))
1322 fputc('\n', stdout);
1323}
1324
1325static void
1326print_firewall_line(const struct ip6t_entry *fw,
1327 const ip6tc_handle_t h)
1328{
1329 struct ip6t_entry_target *t;
1330
1331 t = ip6t_get_target((struct ip6t_entry *)fw);
1332 print_firewall(fw, t->u.user.name, 0, FMT_PRINT_RULE, h);
1333}
1334
1335static int
1336append_entry(const ip6t_chainlabel chain,
1337 struct ip6t_entry *fw,
1338 unsigned int nsaddrs,
1339 const struct in6_addr saddrs[],
1340 unsigned int ndaddrs,
1341 const struct in6_addr daddrs[],
1342 int verbose,
1343 ip6tc_handle_t *handle)
1344{
1345 unsigned int i, j;
1346 int ret = 1;
1347
1348 for (i = 0; i < nsaddrs; i++) {
1349 fw->ipv6.src = saddrs[i];
1350 for (j = 0; j < ndaddrs; j++) {
1351 fw->ipv6.dst = daddrs[j];
1352 if (verbose)
1353 print_firewall_line(fw, *handle);
1354 ret &= ip6tc_append_entry(chain, fw, handle);
1355 }
1356 }
1357
1358 return ret;
1359}
1360
1361static int
1362replace_entry(const ip6t_chainlabel chain,
1363 struct ip6t_entry *fw,
1364 unsigned int rulenum,
1365 const struct in6_addr *saddr,
1366 const struct in6_addr *daddr,
1367 int verbose,
1368 ip6tc_handle_t *handle)
1369{
1370 fw->ipv6.src = *saddr;
1371 fw->ipv6.dst = *daddr;
1372
1373 if (verbose)
1374 print_firewall_line(fw, *handle);
1375 return ip6tc_replace_entry(chain, fw, rulenum, handle);
1376}
1377
1378static int
1379insert_entry(const ip6t_chainlabel chain,
1380 struct ip6t_entry *fw,
1381 unsigned int rulenum,
1382 unsigned int nsaddrs,
1383 const struct in6_addr saddrs[],
1384 unsigned int ndaddrs,
1385 const struct in6_addr daddrs[],
1386 int verbose,
1387 ip6tc_handle_t *handle)
1388{
1389 unsigned int i, j;
1390 int ret = 1;
1391
1392 for (i = 0; i < nsaddrs; i++) {
1393 fw->ipv6.src = saddrs[i];
1394 for (j = 0; j < ndaddrs; j++) {
1395 fw->ipv6.dst = daddrs[j];
1396 if (verbose)
1397 print_firewall_line(fw, *handle);
1398 ret &= ip6tc_insert_entry(chain, fw, rulenum, handle);
1399 }
1400 }
1401
1402 return ret;
1403}
1404
1405static unsigned char *
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001406make_delete_mask(struct ip6t_entry *fw, struct ip6tables_rule_match *matches)
Rusty Russell5eed48a2000-06-02 20:12:24 +00001407{
1408 /* Establish mask for comparison */
1409 unsigned int size;
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001410 struct ip6tables_rule_match *matchp;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001411 unsigned char *mask, *mptr;
1412
1413 size = sizeof(struct ip6t_entry);
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001414 for (matchp = matches; matchp; matchp = matchp->next)
1415 size += IP6T_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001416
1417 mask = fw_calloc(1, size
Harald Welte43ac1912002-03-03 09:43:07 +00001418 + IP6T_ALIGN(sizeof(struct ip6t_entry_target))
Rusty Russell5eed48a2000-06-02 20:12:24 +00001419 + ip6tables_targets->size);
1420
1421 memset(mask, 0xFF, sizeof(struct ip6t_entry));
1422 mptr = mask + sizeof(struct ip6t_entry);
1423
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001424 for (matchp = matches; matchp; matchp = matchp->next) {
Rusty Russell5eed48a2000-06-02 20:12:24 +00001425 memset(mptr, 0xFF,
Harald Welte43ac1912002-03-03 09:43:07 +00001426 IP6T_ALIGN(sizeof(struct ip6t_entry_match))
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001427 + matchp->match->userspacesize);
1428 mptr += IP6T_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001429 }
1430
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001431 memset(mptr, 0xFF,
1432 IP6T_ALIGN(sizeof(struct ip6t_entry_target))
1433 + ip6tables_targets->userspacesize);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001434
1435 return mask;
1436}
1437
1438static int
1439delete_entry(const ip6t_chainlabel chain,
1440 struct ip6t_entry *fw,
1441 unsigned int nsaddrs,
1442 const struct in6_addr saddrs[],
1443 unsigned int ndaddrs,
1444 const struct in6_addr daddrs[],
1445 int verbose,
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001446 ip6tc_handle_t *handle,
1447 struct ip6tables_rule_match *matches)
Rusty Russell5eed48a2000-06-02 20:12:24 +00001448{
1449 unsigned int i, j;
1450 int ret = 1;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001451 unsigned char *mask;
1452
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001453 mask = make_delete_mask(fw, matches);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001454 for (i = 0; i < nsaddrs; i++) {
Philip Blundell57e07af2000-06-04 17:25:33 +00001455 fw->ipv6.src = saddrs[i];
Rusty Russell5eed48a2000-06-02 20:12:24 +00001456 for (j = 0; j < ndaddrs; j++) {
Philip Blundell57e07af2000-06-04 17:25:33 +00001457 fw->ipv6.dst = daddrs[j];
Rusty Russell5eed48a2000-06-02 20:12:24 +00001458 if (verbose)
1459 print_firewall_line(fw, *handle);
Philip Blundell57e07af2000-06-04 17:25:33 +00001460 ret &= ip6tc_delete_entry(chain, fw, mask, handle);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001461 }
1462 }
Martin Josefsson4dd5fed2004-05-18 18:09:43 +00001463 free(mask);
1464
Rusty Russell5eed48a2000-06-02 20:12:24 +00001465 return ret;
1466}
1467
András Kis-Szabó764316a2001-02-26 17:31:20 +00001468int
Rusty Russell5eed48a2000-06-02 20:12:24 +00001469for_each_chain(int (*fn)(const ip6t_chainlabel, int, ip6tc_handle_t *),
1470 int verbose, int builtinstoo, ip6tc_handle_t *handle)
1471{
1472 int ret = 1;
1473 const char *chain;
1474 char *chains;
1475 unsigned int i, chaincount = 0;
1476
1477 chain = ip6tc_first_chain(handle);
1478 while (chain) {
1479 chaincount++;
1480 chain = ip6tc_next_chain(handle);
1481 }
1482
1483 chains = fw_malloc(sizeof(ip6t_chainlabel) * chaincount);
1484 i = 0;
1485 chain = ip6tc_first_chain(handle);
1486 while (chain) {
1487 strcpy(chains + i*sizeof(ip6t_chainlabel), chain);
1488 i++;
1489 chain = ip6tc_next_chain(handle);
1490 }
1491
1492 for (i = 0; i < chaincount; i++) {
1493 if (!builtinstoo
1494 && ip6tc_builtin(chains + i*sizeof(ip6t_chainlabel),
Harald Weltedf1c71c2004-08-30 16:00:32 +00001495 *handle) == 1)
Rusty Russell5eed48a2000-06-02 20:12:24 +00001496 continue;
1497 ret &= fn(chains + i*sizeof(ip6t_chainlabel), verbose, handle);
1498 }
1499
1500 free(chains);
1501 return ret;
1502}
1503
András Kis-Szabó764316a2001-02-26 17:31:20 +00001504int
Rusty Russell5eed48a2000-06-02 20:12:24 +00001505flush_entries(const ip6t_chainlabel chain, int verbose,
1506 ip6tc_handle_t *handle)
1507{
1508 if (!chain)
1509 return for_each_chain(flush_entries, verbose, 1, handle);
1510
1511 if (verbose)
1512 fprintf(stdout, "Flushing chain `%s'\n", chain);
1513 return ip6tc_flush_entries(chain, handle);
1514}
1515
1516static int
1517zero_entries(const ip6t_chainlabel chain, int verbose,
1518 ip6tc_handle_t *handle)
1519{
1520 if (!chain)
1521 return for_each_chain(zero_entries, verbose, 1, handle);
1522
1523 if (verbose)
1524 fprintf(stdout, "Zeroing chain `%s'\n", chain);
1525 return ip6tc_zero_entries(chain, handle);
1526}
1527
András Kis-Szabó764316a2001-02-26 17:31:20 +00001528int
Rusty Russell5eed48a2000-06-02 20:12:24 +00001529delete_chain(const ip6t_chainlabel chain, int verbose,
1530 ip6tc_handle_t *handle)
1531{
1532 if (!chain)
1533 return for_each_chain(delete_chain, verbose, 0, handle);
1534
1535 if (verbose)
1536 fprintf(stdout, "Deleting chain `%s'\n", chain);
1537 return ip6tc_delete_chain(chain, handle);
1538}
1539
1540static int
1541list_entries(const ip6t_chainlabel chain, int verbose, int numeric,
1542 int expanded, int linenumbers, ip6tc_handle_t *handle)
1543{
1544 int found = 0;
1545 unsigned int format;
1546 const char *this;
1547
1548 format = FMT_OPTIONS;
1549 if (!verbose)
1550 format |= FMT_NOCOUNTS;
1551 else
1552 format |= FMT_VIA;
1553
1554 if (numeric)
1555 format |= FMT_NUMERIC;
1556
1557 if (!expanded)
1558 format |= FMT_KILOMEGAGIGA;
1559
1560 if (linenumbers)
1561 format |= FMT_LINENUMBERS;
1562
1563 for (this = ip6tc_first_chain(handle);
1564 this;
1565 this = ip6tc_next_chain(handle)) {
1566 const struct ip6t_entry *i;
1567 unsigned int num;
1568
1569 if (chain && strcmp(chain, this) != 0)
1570 continue;
1571
1572 if (found) printf("\n");
1573
1574 print_header(format, this, handle);
1575 i = ip6tc_first_rule(this, handle);
1576
1577 num = 0;
1578 while (i) {
1579 print_firewall(i,
1580 ip6tc_get_target(i, handle),
1581 num++,
1582 format,
1583 *handle);
1584 i = ip6tc_next_rule(i, handle);
1585 }
1586 found = 1;
1587 }
1588
1589 errno = ENOENT;
1590 return found;
1591}
1592
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001593static char *get_modprobe(void)
1594{
Harald Welte43ac1912002-03-03 09:43:07 +00001595 int procfile;
1596 char *ret;
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001597
Harald Welte43ac1912002-03-03 09:43:07 +00001598 procfile = open(PROC_SYS_MODPROBE, O_RDONLY);
1599 if (procfile < 0)
1600 return NULL;
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001601
Harald Welte43ac1912002-03-03 09:43:07 +00001602 ret = malloc(1024);
1603 if (ret) {
1604 switch (read(procfile, ret, 1024)) {
1605 case -1: goto fail;
1606 case 1024: goto fail; /* Partial read. Wierd */
1607 }
1608 if (ret[strlen(ret)-1]=='\n')
1609 ret[strlen(ret)-1]=0;
1610 close(procfile);
1611 return ret;
1612 }
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001613 fail:
Harald Welte43ac1912002-03-03 09:43:07 +00001614 free(ret);
1615 close(procfile);
1616 return NULL;
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001617}
1618
Harald Welte58918652001-06-16 18:25:25 +00001619int ip6tables_insmod(const char *modname, const char *modprobe)
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001620{
Harald Welte43ac1912002-03-03 09:43:07 +00001621 char *buf = NULL;
1622 char *argv[3];
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001623
Harald Welte43ac1912002-03-03 09:43:07 +00001624 /* If they don't explicitly set it, read out of kernel */
1625 if (!modprobe) {
1626 buf = get_modprobe();
1627 if (!buf)
1628 return -1;
1629 modprobe = buf;
1630 }
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001631
Harald Welte43ac1912002-03-03 09:43:07 +00001632 switch (fork()) {
1633 case 0:
1634 argv[0] = (char *)modprobe;
1635 argv[1] = (char *)modname;
1636 argv[2] = NULL;
1637 execv(argv[0], argv);
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001638
Harald Welte43ac1912002-03-03 09:43:07 +00001639 /* not usually reached */
1640 exit(0);
1641 case -1:
1642 return -1;
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001643
Harald Welte43ac1912002-03-03 09:43:07 +00001644 default: /* parent */
1645 wait(NULL);
1646 }
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001647
Harald Welte43ac1912002-03-03 09:43:07 +00001648 free(buf);
1649 return 0;
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00001650}
1651
Rusty Russell5eed48a2000-06-02 20:12:24 +00001652static struct ip6t_entry *
1653generate_entry(const struct ip6t_entry *fw,
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001654 struct ip6tables_rule_match *matches,
Rusty Russell5eed48a2000-06-02 20:12:24 +00001655 struct ip6t_entry_target *target)
1656{
1657 unsigned int size;
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001658 struct ip6tables_rule_match *matchp;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001659 struct ip6t_entry *e;
1660
1661 size = sizeof(struct ip6t_entry);
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001662 for (matchp = matches; matchp; matchp = matchp->next)
1663 size += matchp->match->m->u.match_size;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001664
1665 e = fw_malloc(size + target->u.target_size);
1666 *e = *fw;
1667 e->target_offset = size;
1668 e->next_offset = size + target->u.target_size;
1669
1670 size = 0;
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001671 for (matchp = matches; matchp; matchp = matchp->next) {
1672 memcpy(e->elems + size, matchp->match->m, matchp->match->m->u.match_size);
1673 size += matchp->match->m->u.match_size;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001674 }
1675 memcpy(e->elems + size, target, target->u.target_size);
1676
1677 return e;
1678}
1679
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001680void clear_rule_matches(struct ip6tables_rule_match **matches)
1681{
1682 struct ip6tables_rule_match *matchp, *tmp;
1683
1684 for (matchp = *matches; matchp;) {
1685 tmp = matchp->next;
Martin Josefsson4dd5fed2004-05-18 18:09:43 +00001686 if (matchp->match->m)
1687 free(matchp->match->m);
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001688 free(matchp);
1689 matchp = tmp;
1690 }
1691
1692 *matches = NULL;
1693}
1694
Rusty Russell5eed48a2000-06-02 20:12:24 +00001695int do_command6(int argc, char *argv[], char **table, ip6tc_handle_t *handle)
1696{
1697 struct ip6t_entry fw, *e = NULL;
1698 int invert = 0;
1699 unsigned int nsaddrs = 0, ndaddrs = 0;
1700 struct in6_addr *saddrs = NULL, *daddrs = NULL;
1701
1702 int c, verbose = 0;
1703 const char *chain = NULL;
1704 const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL;
1705 const char *policy = NULL, *newname = NULL;
1706 unsigned int rulenum = 0, options = 0, command = 0;
Harald Welte43ac1912002-03-03 09:43:07 +00001707 const char *pcnt = NULL, *bcnt = NULL;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001708 int ret = 1;
1709 struct ip6tables_match *m;
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001710 struct ip6tables_rule_match *matches = NULL;
1711 struct ip6tables_rule_match *matchp;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001712 struct ip6tables_target *target = NULL;
András Kis-Szabó3aa62872001-05-03 01:01:41 +00001713 struct ip6tables_target *t;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001714 const char *jumpto = "";
1715 char *protocol = NULL;
Harald Welte43ac1912002-03-03 09:43:07 +00001716 const char *modprobe = NULL;
Harald Welte00f5a9c2002-08-26 14:37:35 +00001717 int proto_used = 0;
Harald Weltecfaed1f2001-10-04 08:11:44 +00001718 char icmp6p[] = "icmpv6";
Rusty Russell5eed48a2000-06-02 20:12:24 +00001719
1720 memset(&fw, 0, sizeof(fw));
1721
Harald Welte43ac1912002-03-03 09:43:07 +00001722 /* re-set optind to 0 in case do_command gets called
András Kis-Szabó3aa62872001-05-03 01:01:41 +00001723 * a second time */
1724 optind = 0;
1725
Harald Welte43ac1912002-03-03 09:43:07 +00001726 /* clear mflags in case do_command gets called a second time
1727 * (we clear the global list of all matches for security)*/
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001728 for (m = ip6tables_matches; m; m = m->next)
Harald Welte43ac1912002-03-03 09:43:07 +00001729 m->mflags = 0;
András Kis-Szabó3aa62872001-05-03 01:01:41 +00001730
Harald Welte43ac1912002-03-03 09:43:07 +00001731 for (t = ip6tables_targets; t; t = t->next) {
1732 t->tflags = 0;
1733 t->used = 0;
1734 }
András Kis-Szabó3aa62872001-05-03 01:01:41 +00001735
Rusty Russell5eed48a2000-06-02 20:12:24 +00001736 /* Suppress error messages: we may add new options if we
1737 demand-load a protocol. */
1738 opterr = 0;
1739
1740 while ((c = getopt_long(argc, argv,
András Kis-Szabó0c4188f2002-08-14 11:40:41 +00001741 "-A:D:R:I:L::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:bvnt:m:xc:",
Rusty Russell5eed48a2000-06-02 20:12:24 +00001742 opts, NULL)) != -1) {
1743 switch (c) {
1744 /*
1745 * Command selection
1746 */
1747 case 'A':
1748 add_command(&command, CMD_APPEND, CMD_NONE,
1749 invert);
1750 chain = optarg;
1751 break;
1752
1753 case 'D':
1754 add_command(&command, CMD_DELETE, CMD_NONE,
1755 invert);
1756 chain = optarg;
1757 if (optind < argc && argv[optind][0] != '-'
1758 && argv[optind][0] != '!') {
1759 rulenum = parse_rulenumber(argv[optind++]);
1760 command = CMD_DELETE_NUM;
1761 }
1762 break;
1763
Rusty Russell5eed48a2000-06-02 20:12:24 +00001764 case 'R':
1765 add_command(&command, CMD_REPLACE, CMD_NONE,
1766 invert);
1767 chain = optarg;
1768 if (optind < argc && argv[optind][0] != '-'
1769 && argv[optind][0] != '!')
1770 rulenum = parse_rulenumber(argv[optind++]);
1771 else
1772 exit_error(PARAMETER_PROBLEM,
1773 "-%c requires a rule number",
1774 cmd2char(CMD_REPLACE));
1775 break;
1776
1777 case 'I':
1778 add_command(&command, CMD_INSERT, CMD_NONE,
1779 invert);
1780 chain = optarg;
1781 if (optind < argc && argv[optind][0] != '-'
1782 && argv[optind][0] != '!')
1783 rulenum = parse_rulenumber(argv[optind++]);
1784 else rulenum = 1;
1785 break;
1786
1787 case 'L':
1788 add_command(&command, CMD_LIST, CMD_ZERO,
1789 invert);
1790 if (optarg) chain = optarg;
1791 else if (optind < argc && argv[optind][0] != '-'
1792 && argv[optind][0] != '!')
1793 chain = argv[optind++];
1794 break;
1795
1796 case 'F':
1797 add_command(&command, CMD_FLUSH, CMD_NONE,
1798 invert);
1799 if (optarg) chain = optarg;
1800 else if (optind < argc && argv[optind][0] != '-'
1801 && argv[optind][0] != '!')
1802 chain = argv[optind++];
1803 break;
1804
1805 case 'Z':
1806 add_command(&command, CMD_ZERO, CMD_LIST,
1807 invert);
1808 if (optarg) chain = optarg;
1809 else if (optind < argc && argv[optind][0] != '-'
1810 && argv[optind][0] != '!')
1811 chain = argv[optind++];
1812 break;
1813
1814 case 'N':
Joszef Kadlecsik08f15272002-06-24 12:37:29 +00001815 if (optarg && *optarg == '-')
1816 exit_error(PARAMETER_PROBLEM,
1817 "chain name not allowed to start "
1818 "with `-'\n");
1819 if (find_target(optarg, TRY_LOAD))
1820 exit_error(PARAMETER_PROBLEM,
1821 "chain name may not clash "
1822 "with target name\n");
Rusty Russell5eed48a2000-06-02 20:12:24 +00001823 add_command(&command, CMD_NEW_CHAIN, CMD_NONE,
1824 invert);
1825 chain = optarg;
1826 break;
1827
1828 case 'X':
1829 add_command(&command, CMD_DELETE_CHAIN, CMD_NONE,
1830 invert);
1831 if (optarg) chain = optarg;
1832 else if (optind < argc && argv[optind][0] != '-'
1833 && argv[optind][0] != '!')
1834 chain = argv[optind++];
1835 break;
1836
1837 case 'E':
1838 add_command(&command, CMD_RENAME_CHAIN, CMD_NONE,
1839 invert);
1840 chain = optarg;
1841 if (optind < argc && argv[optind][0] != '-'
1842 && argv[optind][0] != '!')
1843 newname = argv[optind++];
M.P.Anand Babuc9f20d32000-06-09 09:22:38 +00001844 else
1845 exit_error(PARAMETER_PROBLEM,
1846 "-%c requires old-chain-name and "
1847 "new-chain-name",
Harald Welte43ac1912002-03-03 09:43:07 +00001848 cmd2char(CMD_RENAME_CHAIN));
Rusty Russell5eed48a2000-06-02 20:12:24 +00001849 break;
1850
1851 case 'P':
1852 add_command(&command, CMD_SET_POLICY, CMD_NONE,
1853 invert);
1854 chain = optarg;
1855 if (optind < argc && argv[optind][0] != '-'
1856 && argv[optind][0] != '!')
1857 policy = argv[optind++];
1858 else
1859 exit_error(PARAMETER_PROBLEM,
1860 "-%c requires a chain and a policy",
1861 cmd2char(CMD_SET_POLICY));
1862 break;
1863
1864 case 'h':
1865 if (!optarg)
1866 optarg = argv[optind];
1867
1868 /* iptables -p icmp -h */
Martin Josefsson66aea6f2004-05-26 15:41:54 +00001869 if (!matches && protocol)
1870 find_match(protocol, TRY_LOAD, &matches);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001871
Martin Josefsson66aea6f2004-05-26 15:41:54 +00001872 exit_printhelp(matches);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001873
1874 /*
1875 * Option selection
1876 */
1877 case 'p':
Harald Welteb77f1da2002-03-14 11:35:58 +00001878 check_inverse(optarg, &invert, &optind, argc);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001879 set_option(&options, OPT_PROTOCOL, &fw.ipv6.invflags,
1880 invert);
1881
1882 /* Canonicalize into lower case */
1883 for (protocol = argv[optind-1]; *protocol; protocol++)
1884 *protocol = tolower(*protocol);
1885
1886 protocol = argv[optind-1];
Harald Weltecfaed1f2001-10-04 08:11:44 +00001887 if ( strcmp(protocol,"ipv6-icmp") == 0)
1888 protocol = icmp6p;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001889 fw.ipv6.proto = parse_protocol(protocol);
1890 fw.ipv6.flags |= IP6T_F_PROTO;
1891
1892 if (fw.ipv6.proto == 0
1893 && (fw.ipv6.invflags & IP6T_INV_PROTO))
1894 exit_error(PARAMETER_PROBLEM,
1895 "rule would never match protocol");
1896 fw.nfcache |= NFC_IP6_PROTO;
1897 break;
1898
1899 case 's':
Harald Welteb77f1da2002-03-14 11:35:58 +00001900 check_inverse(optarg, &invert, &optind, argc);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001901 set_option(&options, OPT_SOURCE, &fw.ipv6.invflags,
1902 invert);
1903 shostnetworkmask = argv[optind-1];
1904 fw.nfcache |= NFC_IP6_SRC;
1905 break;
1906
1907 case 'd':
Harald Welteb77f1da2002-03-14 11:35:58 +00001908 check_inverse(optarg, &invert, &optind, argc);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001909 set_option(&options, OPT_DESTINATION, &fw.ipv6.invflags,
1910 invert);
1911 dhostnetworkmask = argv[optind-1];
1912 fw.nfcache |= NFC_IP6_DST;
1913 break;
1914
1915 case 'j':
1916 set_option(&options, OPT_JUMP, &fw.ipv6.invflags,
1917 invert);
1918 jumpto = parse_target(optarg);
Harald Welte43ac1912002-03-03 09:43:07 +00001919 /* TRY_LOAD (may be chain name) */
Rusty Russell5eed48a2000-06-02 20:12:24 +00001920 target = find_target(jumpto, TRY_LOAD);
1921
1922 if (target) {
1923 size_t size;
1924
Harald Welte43ac1912002-03-03 09:43:07 +00001925 size = IP6T_ALIGN(sizeof(struct ip6t_entry_target))
1926 + target->size;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001927
1928 target->t = fw_calloc(1, size);
1929 target->t->u.target_size = size;
1930 strcpy(target->t->u.user.name, jumpto);
1931 target->init(target->t, &fw.nfcache);
András Kis-Szabó3aa62872001-05-03 01:01:41 +00001932 opts = merge_options(opts, target->extra_opts, &target->option_offset);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001933 }
1934 break;
1935
1936
1937 case 'i':
Harald Welteb77f1da2002-03-14 11:35:58 +00001938 check_inverse(optarg, &invert, &optind, argc);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001939 set_option(&options, OPT_VIANAMEIN, &fw.ipv6.invflags,
1940 invert);
1941 parse_interface(argv[optind-1],
1942 fw.ipv6.iniface,
1943 fw.ipv6.iniface_mask);
1944 fw.nfcache |= NFC_IP6_IF_IN;
1945 break;
1946
1947 case 'o':
Harald Welteb77f1da2002-03-14 11:35:58 +00001948 check_inverse(optarg, &invert, &optind, argc);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001949 set_option(&options, OPT_VIANAMEOUT, &fw.ipv6.invflags,
1950 invert);
1951 parse_interface(argv[optind-1],
1952 fw.ipv6.outiface,
1953 fw.ipv6.outiface_mask);
1954 fw.nfcache |= NFC_IP6_IF_OUT;
1955 break;
1956
1957 case 'v':
1958 if (!verbose)
1959 set_option(&options, OPT_VERBOSE,
1960 &fw.ipv6.invflags, invert);
1961 verbose++;
1962 break;
1963
1964 case 'm': {
1965 size_t size;
1966
1967 if (invert)
1968 exit_error(PARAMETER_PROBLEM,
1969 "unexpected ! flag before --match");
1970
Martin Josefsson69ac0e02004-02-02 20:02:10 +00001971 m = find_match(optarg, LOAD_MUST_SUCCEED, &matches);
Harald Welte43ac1912002-03-03 09:43:07 +00001972 size = IP6T_ALIGN(sizeof(struct ip6t_entry_match))
1973 + m->size;
Rusty Russell5eed48a2000-06-02 20:12:24 +00001974 m->m = fw_calloc(1, size);
1975 m->m->u.match_size = size;
1976 strcpy(m->m->u.user.name, m->name);
1977 m->init(m->m, &fw.nfcache);
András Kis-Szabó3aa62872001-05-03 01:01:41 +00001978 opts = merge_options(opts, m->extra_opts, &m->option_offset);
Rusty Russell5eed48a2000-06-02 20:12:24 +00001979 }
1980 break;
1981
1982 case 'n':
1983 set_option(&options, OPT_NUMERIC, &fw.ipv6.invflags,
1984 invert);
1985 break;
1986
1987 case 't':
1988 if (invert)
1989 exit_error(PARAMETER_PROBLEM,
1990 "unexpected ! flag before --table");
1991 *table = argv[optind-1];
1992 break;
1993
1994 case 'x':
1995 set_option(&options, OPT_EXPANDED, &fw.ipv6.invflags,
1996 invert);
1997 break;
1998
1999 case 'V':
2000 if (invert)
2001 printf("Not %s ;-)\n", program_version);
2002 else
2003 printf("%s v%s\n",
2004 program_name, program_version);
2005 exit(0);
2006
2007 case '0':
2008 set_option(&options, OPT_LINENUMBERS, &fw.ipv6.invflags,
2009 invert);
2010 break;
2011
Harald Welte43ac1912002-03-03 09:43:07 +00002012 case 'M':
2013 modprobe = optarg;
2014 break;
2015
2016 case 'c':
2017
2018 set_option(&options, OPT_COUNTERS, &fw.ipv6.invflags,
2019 invert);
2020 pcnt = optarg;
2021 if (optind < argc && argv[optind][0] != '-'
2022 && argv[optind][0] != '!')
2023 bcnt = argv[optind++];
2024 else
2025 exit_error(PARAMETER_PROBLEM,
2026 "-%c requires packet and byte counter",
2027 opt2char(OPT_COUNTERS));
2028
Martin Josefssona28d4952004-05-26 16:04:48 +00002029 if (sscanf(pcnt, "%llu", (unsigned long long *)&fw.counters.pcnt) != 1)
Harald Welte43ac1912002-03-03 09:43:07 +00002030 exit_error(PARAMETER_PROBLEM,
2031 "-%c packet counter not numeric",
2032 opt2char(OPT_COUNTERS));
2033
Martin Josefssona28d4952004-05-26 16:04:48 +00002034 if (sscanf(bcnt, "%llu", (unsigned long long *)&fw.counters.bcnt) != 1)
Harald Welte43ac1912002-03-03 09:43:07 +00002035 exit_error(PARAMETER_PROBLEM,
2036 "-%c byte counter not numeric",
2037 opt2char(OPT_COUNTERS));
2038
2039 break;
2040
2041
Rusty Russell5eed48a2000-06-02 20:12:24 +00002042 case 1: /* non option */
2043 if (optarg[0] == '!' && optarg[1] == '\0') {
2044 if (invert)
2045 exit_error(PARAMETER_PROBLEM,
2046 "multiple consecutive ! not"
2047 " allowed");
2048 invert = TRUE;
2049 optarg[0] = '\0';
2050 continue;
2051 }
2052 printf("Bad argument `%s'\n", optarg);
2053 exit_tryhelp(2);
2054
2055 default:
2056 /* FIXME: This scheme doesn't allow two of the same
2057 matches --RR */
2058 if (!target
2059 || !(target->parse(c - target->option_offset,
2060 argv, invert,
2061 &target->tflags,
2062 &fw, &target->t))) {
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002063 for (matchp = matches; matchp; matchp = matchp->next) {
2064 if (matchp->match->parse(c - matchp->match->option_offset,
Rusty Russell5eed48a2000-06-02 20:12:24 +00002065 argv, invert,
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002066 &matchp->match->mflags,
Rusty Russell5eed48a2000-06-02 20:12:24 +00002067 &fw,
2068 &fw.nfcache,
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002069 &matchp->match->m))
Rusty Russell5eed48a2000-06-02 20:12:24 +00002070 break;
2071 }
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002072 m = matchp ? matchp->match : NULL;
Harald Welte00f5a9c2002-08-26 14:37:35 +00002073
2074 /* If you listen carefully, you can
2075 actually hear this code suck. */
2076
2077 /* some explanations (after four different bugs
2078 * in 3 different releases): If we encountere a
2079 * parameter, that has not been parsed yet,
2080 * it's not an option of an explicitly loaded
2081 * match or a target. However, we support
2082 * implicit loading of the protocol match
2083 * extension. '-p tcp' means 'l4 proto 6' and
2084 * at the same time 'load tcp protocol match on
2085 * demand if we specify --dport'.
2086 *
2087 * To make this work, we need to make sure:
2088 * - the parameter has not been parsed by
2089 * a match (m above)
2090 * - a protocol has been specified
2091 * - the protocol extension has not been
2092 * loaded yet, or is loaded and unused
2093 * [think of iptables-restore!]
2094 * - the protocol extension can be successively
2095 * loaded
2096 */
2097 if (m == NULL
2098 && protocol
2099 && (!find_proto(protocol, DONT_LOAD,
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002100 options&OPT_NUMERIC, NULL)
Harald Welte00f5a9c2002-08-26 14:37:35 +00002101 || (find_proto(protocol, DONT_LOAD,
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002102 options&OPT_NUMERIC, NULL)
Harald Welte00f5a9c2002-08-26 14:37:35 +00002103 && (proto_used == 0))
2104 )
2105 && (m = find_proto(protocol, TRY_LOAD,
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002106 options&OPT_NUMERIC, &matches))) {
Harald Welte00f5a9c2002-08-26 14:37:35 +00002107 /* Try loading protocol */
2108 size_t size;
2109
2110 proto_used = 1;
2111
2112 size = IP6T_ALIGN(sizeof(struct ip6t_entry_match))
2113 + m->size;
2114
2115 m->m = fw_calloc(1, size);
2116 m->m->u.match_size = size;
2117 strcpy(m->m->u.user.name, m->name);
2118 m->init(m->m, &fw.nfcache);
2119
2120 opts = merge_options(opts,
2121 m->extra_opts, &m->option_offset);
2122
2123 optind--;
2124 continue;
2125 }
2126
Rusty Russell5eed48a2000-06-02 20:12:24 +00002127 if (!m)
2128 exit_error(PARAMETER_PROBLEM,
2129 "Unknown arg `%s'",
2130 argv[optind-1]);
2131 }
2132 }
2133 invert = FALSE;
2134 }
2135
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002136 for (matchp = matches; matchp; matchp = matchp->next)
2137 matchp->match->final_check(matchp->match->mflags);
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00002138
Harald Welte43ac1912002-03-03 09:43:07 +00002139 if (target)
Rusty Russell5eed48a2000-06-02 20:12:24 +00002140 target->final_check(target->tflags);
2141
2142 /* Fix me: must put inverse options checking here --MN */
2143
2144 if (optind < argc)
2145 exit_error(PARAMETER_PROBLEM,
2146 "unknown arguments found on commandline");
2147 if (!command)
2148 exit_error(PARAMETER_PROBLEM, "no command specified");
2149 if (invert)
2150 exit_error(PARAMETER_PROBLEM,
2151 "nothing appropriate following !");
2152
András Kis-Szabó0c4188f2002-08-14 11:40:41 +00002153 if (command & (CMD_REPLACE | CMD_INSERT | CMD_DELETE | CMD_APPEND)) {
Rusty Russell5eed48a2000-06-02 20:12:24 +00002154 if (!(options & OPT_DESTINATION))
András Kis-Szabó764316a2001-02-26 17:31:20 +00002155 dhostnetworkmask = "::0/0";
Rusty Russell5eed48a2000-06-02 20:12:24 +00002156 if (!(options & OPT_SOURCE))
András Kis-Szabó764316a2001-02-26 17:31:20 +00002157 shostnetworkmask = "::0/0";
Rusty Russell5eed48a2000-06-02 20:12:24 +00002158 }
2159
2160 if (shostnetworkmask)
2161 parse_hostnetworkmask(shostnetworkmask, &saddrs,
2162 &(fw.ipv6.smsk), &nsaddrs);
2163
2164 if (dhostnetworkmask)
2165 parse_hostnetworkmask(dhostnetworkmask, &daddrs,
2166 &(fw.ipv6.dmsk), &ndaddrs);
2167
2168 if ((nsaddrs > 1 || ndaddrs > 1) &&
2169 (fw.ipv6.invflags & (IP6T_INV_SRCIP | IP6T_INV_DSTIP)))
2170 exit_error(PARAMETER_PROBLEM, "! not allowed with multiple"
2171 " source or destination IP addresses");
2172
Rusty Russell5eed48a2000-06-02 20:12:24 +00002173 if (command == CMD_REPLACE && (nsaddrs != 1 || ndaddrs != 1))
2174 exit_error(PARAMETER_PROBLEM, "Replacement rule does not "
2175 "specify a unique address");
2176
2177 generic_opt_check(command, options);
2178
2179 if (chain && strlen(chain) > IP6T_FUNCTION_MAXNAMELEN)
2180 exit_error(PARAMETER_PROBLEM,
2181 "chain name `%s' too long (must be under %i chars)",
2182 chain, IP6T_FUNCTION_MAXNAMELEN);
2183
Harald Welte43ac1912002-03-03 09:43:07 +00002184 /* only allocate handle if we weren't called with a handle */
Martin Josefsson8371e152003-05-05 19:33:40 +00002185 if (!*handle)
Harald Welte43ac1912002-03-03 09:43:07 +00002186 *handle = ip6tc_init(*table);
András Kis-Szabó3aa62872001-05-03 01:01:41 +00002187
Harald Welte43ac1912002-03-03 09:43:07 +00002188 if (!*handle) {
2189 /* try to insmod the module if iptc_init failed */
2190 ip6tables_insmod("ip6_tables", modprobe);
2191 *handle = ip6tc_init(*table);
2192 }
Fabrice MARIE8a5eb6d2001-05-05 21:37:47 +00002193
Harald Welte43ac1912002-03-03 09:43:07 +00002194 if (!*handle)
2195 exit_error(VERSION_PROBLEM,
2196 "can't initialize ip6tables table `%s': %s",
2197 *table, ip6tc_strerror(errno));
Rusty Russell5eed48a2000-06-02 20:12:24 +00002198
András Kis-Szabó0c4188f2002-08-14 11:40:41 +00002199 if (command == CMD_APPEND
Rusty Russell5eed48a2000-06-02 20:12:24 +00002200 || command == CMD_DELETE
2201 || command == CMD_INSERT
2202 || command == CMD_REPLACE) {
Harald Welte43ac1912002-03-03 09:43:07 +00002203 if (strcmp(chain, "PREROUTING") == 0
2204 || strcmp(chain, "INPUT") == 0) {
2205 /* -o not valid with incoming packets. */
2206 if (options & OPT_VIANAMEOUT)
2207 exit_error(PARAMETER_PROBLEM,
2208 "Can't use -%c with %s\n",
2209 opt2char(OPT_VIANAMEOUT),
2210 chain);
Harald Welte43ac1912002-03-03 09:43:07 +00002211 }
Rusty Russell5eed48a2000-06-02 20:12:24 +00002212
Harald Welte43ac1912002-03-03 09:43:07 +00002213 if (strcmp(chain, "POSTROUTING") == 0
2214 || strcmp(chain, "OUTPUT") == 0) {
2215 /* -i not valid with outgoing packets */
2216 if (options & OPT_VIANAMEIN)
2217 exit_error(PARAMETER_PROBLEM,
2218 "Can't use -%c with %s\n",
2219 opt2char(OPT_VIANAMEIN),
2220 chain);
Harald Welte43ac1912002-03-03 09:43:07 +00002221 }
Rusty Russell5eed48a2000-06-02 20:12:24 +00002222
2223 if (target && ip6tc_is_chain(jumpto, *handle)) {
2224 printf("Warning: using chain %s, not extension\n",
2225 jumpto);
2226
Martin Josefsson4dd5fed2004-05-18 18:09:43 +00002227 if (target->t)
2228 free(target->t);
2229
Rusty Russell5eed48a2000-06-02 20:12:24 +00002230 target = NULL;
2231 }
2232
2233 /* If they didn't specify a target, or it's a chain
2234 name, use standard. */
2235 if (!target
2236 && (strlen(jumpto) == 0
2237 || ip6tc_is_chain(jumpto, *handle))) {
2238 size_t size;
2239
2240 target = find_target(IP6T_STANDARD_TARGET,
2241 LOAD_MUST_SUCCEED);
2242
2243 size = sizeof(struct ip6t_entry_target)
2244 + target->size;
2245 target->t = fw_calloc(1, size);
2246 target->t->u.target_size = size;
2247 strcpy(target->t->u.user.name, jumpto);
2248 target->init(target->t, &fw.nfcache);
2249 }
2250
2251 if (!target) {
Harald Welte43ac1912002-03-03 09:43:07 +00002252 /* it is no chain, and we can't load a plugin.
2253 * We cannot know if the plugin is corrupt, non
2254 * existant OR if the user just misspelled a
2255 * chain. */
2256 find_target(jumpto, LOAD_MUST_SUCCEED);
Rusty Russell5eed48a2000-06-02 20:12:24 +00002257 } else {
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002258 e = generate_entry(&fw, matches, target->t);
Martin Josefsson4dd5fed2004-05-18 18:09:43 +00002259 free(target->t);
Rusty Russell5eed48a2000-06-02 20:12:24 +00002260 }
2261 }
2262
2263 switch (command) {
2264 case CMD_APPEND:
2265 ret = append_entry(chain, e,
2266 nsaddrs, saddrs, ndaddrs, daddrs,
2267 options&OPT_VERBOSE,
2268 handle);
2269 break;
Rusty Russell5eed48a2000-06-02 20:12:24 +00002270 case CMD_DELETE:
2271 ret = delete_entry(chain, e,
2272 nsaddrs, saddrs, ndaddrs, daddrs,
2273 options&OPT_VERBOSE,
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002274 handle, matches);
Rusty Russell5eed48a2000-06-02 20:12:24 +00002275 break;
2276 case CMD_DELETE_NUM:
2277 ret = ip6tc_delete_num_entry(chain, rulenum - 1, handle);
2278 break;
2279 case CMD_REPLACE:
2280 ret = replace_entry(chain, e, rulenum - 1,
2281 saddrs, daddrs, options&OPT_VERBOSE,
2282 handle);
2283 break;
2284 case CMD_INSERT:
2285 ret = insert_entry(chain, e, rulenum - 1,
2286 nsaddrs, saddrs, ndaddrs, daddrs,
2287 options&OPT_VERBOSE,
2288 handle);
2289 break;
2290 case CMD_LIST:
2291 ret = list_entries(chain,
2292 options&OPT_VERBOSE,
2293 options&OPT_NUMERIC,
2294 options&OPT_EXPANDED,
2295 options&OPT_LINENUMBERS,
2296 handle);
2297 break;
2298 case CMD_FLUSH:
2299 ret = flush_entries(chain, options&OPT_VERBOSE, handle);
2300 break;
2301 case CMD_ZERO:
2302 ret = zero_entries(chain, options&OPT_VERBOSE, handle);
2303 break;
2304 case CMD_LIST|CMD_ZERO:
2305 ret = list_entries(chain,
2306 options&OPT_VERBOSE,
2307 options&OPT_NUMERIC,
2308 options&OPT_EXPANDED,
2309 options&OPT_LINENUMBERS,
2310 handle);
2311 if (ret)
2312 ret = zero_entries(chain,
2313 options&OPT_VERBOSE, handle);
2314 break;
2315 case CMD_NEW_CHAIN:
2316 ret = ip6tc_create_chain(chain, handle);
2317 break;
2318 case CMD_DELETE_CHAIN:
2319 ret = delete_chain(chain, options&OPT_VERBOSE, handle);
2320 break;
2321 case CMD_RENAME_CHAIN:
2322 ret = ip6tc_rename_chain(chain, newname, handle);
2323 break;
2324 case CMD_SET_POLICY:
Harald Welted8e65632001-01-05 15:20:07 +00002325 ret = ip6tc_set_policy(chain, policy, NULL, handle);
Rusty Russell5eed48a2000-06-02 20:12:24 +00002326 break;
2327 default:
2328 /* We should never reach this... */
2329 exit_tryhelp(2);
2330 }
2331
2332 if (verbose > 1)
2333 dump_entries6(*handle);
2334
Martin Josefsson69ac0e02004-02-02 20:02:10 +00002335 clear_rule_matches(&matches);
2336
Martin Josefsson4dd5fed2004-05-18 18:09:43 +00002337 if (e != NULL) {
2338 free(e);
2339 e = NULL;
2340 }
2341
2342 for (c = 0; c < nsaddrs; c++)
2343 free(&saddrs[c]);
2344
2345 for (c = 0; c < ndaddrs; c++)
2346 free(&daddrs[c]);
2347
2348 if (opts != original_opts) {
2349 free(opts);
2350 opts = original_opts;
2351 global_option_offset = 0;
2352 }
2353
Rusty Russell5eed48a2000-06-02 20:12:24 +00002354 return ret;
2355}