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Packit |
7b22a4 |
/* Code to save the iptables state, in human readable-form. */
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Packit |
7b22a4 |
/* (C) 1999 by Paul 'Rusty' Russell <rusty@rustcorp.com.au> and
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Packit |
7b22a4 |
* (C) 2000-2002 by Harald Welte <laforge@gnumonks.org>
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Packit |
7b22a4 |
*
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Packit |
7b22a4 |
* This code is distributed under the terms of GNU GPL v2
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Packit |
7b22a4 |
*
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Packit |
7b22a4 |
*/
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Packit |
7b22a4 |
#include "config.h"
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Packit |
7b22a4 |
#include <getopt.h>
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Packit |
7b22a4 |
#include <errno.h>
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Packit |
7b22a4 |
#include <stdio.h>
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Packit |
7b22a4 |
#include <fcntl.h>
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Packit |
7b22a4 |
#include <stdlib.h>
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Packit |
7b22a4 |
#include <string.h>
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Packit |
7b22a4 |
#include <time.h>
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Packit |
7b22a4 |
#include <netdb.h>
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Packit |
7b22a4 |
#include <unistd.h>
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Packit |
7b22a4 |
#include "libiptc/libiptc.h"
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Packit |
7b22a4 |
#include "libiptc/libip6tc.h"
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Packit |
7b22a4 |
#include "iptables.h"
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Packit |
7b22a4 |
#include "ip6tables.h"
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Packit |
7b22a4 |
#include "iptables-multi.h"
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Packit |
7b22a4 |
#include "ip6tables-multi.h"
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Packit |
7b22a4 |
#include "xshared.h"
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Packit |
7b22a4 |
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Packit |
7b22a4 |
static int show_counters;
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Packit |
7b22a4 |
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Packit |
7b22a4 |
static const struct option options[] = {
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Packit |
7b22a4 |
{.name = "counters", .has_arg = false, .val = 'c'},
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Packit |
7b22a4 |
{.name = "dump", .has_arg = false, .val = 'd'},
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Packit |
7b22a4 |
{.name = "table", .has_arg = true, .val = 't'},
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Packit |
7b22a4 |
{.name = "modprobe", .has_arg = true, .val = 'M'},
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Packit |
7b22a4 |
{.name = "file", .has_arg = true, .val = 'f'},
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Packit |
7b22a4 |
{.name = "version", .has_arg = false, .val = 'V'},
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Packit |
7b22a4 |
{NULL},
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Packit |
7b22a4 |
};
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Packit |
7b22a4 |
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Packit |
7b22a4 |
struct iptables_save_cb {
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Packit |
7b22a4 |
const struct xtc_ops *ops;
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Packit |
7b22a4 |
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Packit |
7b22a4 |
void (*dump_rules)(const char *chain, struct xtc_handle *handle);
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Packit |
7b22a4 |
};
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Packit |
7b22a4 |
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Packit |
7b22a4 |
static int
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Packit |
7b22a4 |
for_each_table(int (*func)(struct iptables_save_cb *cb, const char *tablename),
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Packit |
7b22a4 |
struct iptables_save_cb *cb)
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Packit |
7b22a4 |
{
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Packit |
7b22a4 |
int ret = 1;
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Packit |
7b22a4 |
FILE *procfile = NULL;
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Packit |
7b22a4 |
char tablename[XT_TABLE_MAXNAMELEN+1];
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Packit |
7b22a4 |
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Packit |
7b22a4 |
procfile = fopen(afinfo->proc_exists, "re");
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Packit |
7b22a4 |
if (!procfile) {
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Packit |
7b22a4 |
if (errno == ENOENT)
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Packit |
7b22a4 |
return ret;
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Packit |
7b22a4 |
fprintf(stderr, "Failed to list table names in %s: %s\n",
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Packit |
7b22a4 |
afinfo->proc_exists, strerror(errno));
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Packit |
7b22a4 |
exit(1);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
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Packit |
7b22a4 |
while (fgets(tablename, sizeof(tablename), procfile)) {
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Packit |
7b22a4 |
if (tablename[strlen(tablename) - 1] != '\n')
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Packit |
7b22a4 |
xtables_error(OTHER_PROBLEM,
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Packit |
7b22a4 |
"Badly formed tablename `%s'\n",
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Packit |
7b22a4 |
tablename);
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Packit |
7b22a4 |
tablename[strlen(tablename) - 1] = '\0';
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Packit |
7b22a4 |
ret &= func(cb, tablename);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
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Packit |
7b22a4 |
fclose(procfile);
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Packit |
7b22a4 |
return ret;
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
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Packit |
7b22a4 |
static int do_output(struct iptables_save_cb *cb, const char *tablename)
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Packit |
7b22a4 |
{
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Packit |
7b22a4 |
struct xtc_handle *h;
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Packit |
7b22a4 |
const char *chain = NULL;
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Packit |
7b22a4 |
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Packit |
7b22a4 |
if (!tablename)
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Packit |
7b22a4 |
return for_each_table(&do_output, cb);
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Packit |
7b22a4 |
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Packit |
7b22a4 |
h = cb->ops->init(tablename);
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Packit |
7b22a4 |
if (h == NULL) {
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Packit |
7b22a4 |
xtables_load_ko(xtables_modprobe_program, false);
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Packit |
7b22a4 |
h = cb->ops->init(tablename);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
if (!h)
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Packit |
7b22a4 |
xtables_error(OTHER_PROBLEM, "Cannot initialize: %s\n",
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Packit |
7b22a4 |
cb->ops->strerror(errno));
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Packit |
7b22a4 |
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Packit |
7b22a4 |
time_t now = time(NULL);
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Packit |
7b22a4 |
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Packit |
7b22a4 |
printf("# Generated by %s v%s on %s",
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Packit |
7b22a4 |
xt_params->program_name, PACKAGE_VERSION, ctime(&now));
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Packit |
7b22a4 |
printf("*%s\n", tablename);
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Packit |
7b22a4 |
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Packit |
7b22a4 |
/* Dump out chain names first,
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Packit |
7b22a4 |
* thereby preventing dependency conflicts */
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Packit |
7b22a4 |
for (chain = cb->ops->first_chain(h);
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Packit |
7b22a4 |
chain;
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Packit |
7b22a4 |
chain = cb->ops->next_chain(h)) {
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Packit |
7b22a4 |
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Packit |
7b22a4 |
printf(":%s ", chain);
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Packit |
7b22a4 |
if (cb->ops->builtin(chain, h)) {
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Packit |
7b22a4 |
struct xt_counters count;
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Packit |
7b22a4 |
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Packit |
7b22a4 |
printf("%s ", cb->ops->get_policy(chain, &count, h));
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Packit |
7b22a4 |
printf("[%llu:%llu]\n",
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Packit |
7b22a4 |
(unsigned long long)count.pcnt,
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Packit |
7b22a4 |
(unsigned long long)count.bcnt);
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Packit |
7b22a4 |
} else {
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Packit |
7b22a4 |
printf("- [0:0]\n");
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
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Packit |
7b22a4 |
for (chain = cb->ops->first_chain(h);
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Packit |
7b22a4 |
chain;
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Packit |
7b22a4 |
chain = cb->ops->next_chain(h)) {
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Packit |
7b22a4 |
cb->dump_rules(chain, h);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
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Packit |
7b22a4 |
now = time(NULL);
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Packit |
7b22a4 |
printf("COMMIT\n");
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Packit |
7b22a4 |
printf("# Completed on %s", ctime(&now));
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Packit |
7b22a4 |
cb->ops->free(h);
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Packit |
7b22a4 |
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Packit |
7b22a4 |
return 1;
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
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Packit |
7b22a4 |
/* Format:
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Packit |
7b22a4 |
* :Chain name POLICY packets bytes
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Packit |
7b22a4 |
* rule
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Packit |
7b22a4 |
*/
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Packit |
7b22a4 |
static int
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Packit |
7b22a4 |
do_iptables_save(struct iptables_save_cb *cb, int argc, char *argv[])
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Packit |
7b22a4 |
{
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Packit |
7b22a4 |
const char *tablename = NULL;
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Packit |
7b22a4 |
FILE *file = NULL;
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Packit |
7b22a4 |
int ret, c;
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Packit |
7b22a4 |
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Packit |
7b22a4 |
while ((c = getopt_long(argc, argv, "bcdt:M:f:V", options, NULL)) != -1) {
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Packit |
7b22a4 |
switch (c) {
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Packit |
7b22a4 |
case 'b':
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Packit |
7b22a4 |
fprintf(stderr, "-b/--binary option is not implemented\n");
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Packit |
7b22a4 |
break;
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Packit |
7b22a4 |
case 'c':
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Packit |
7b22a4 |
show_counters = 1;
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Packit |
7b22a4 |
break;
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Packit |
7b22a4 |
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Packit |
7b22a4 |
case 't':
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Packit |
7b22a4 |
/* Select specific table. */
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Packit |
7b22a4 |
tablename = optarg;
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Packit |
7b22a4 |
break;
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Packit |
7b22a4 |
case 'M':
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Packit |
7b22a4 |
xtables_modprobe_program = optarg;
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Packit |
7b22a4 |
break;
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Packit |
7b22a4 |
case 'f':
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Packit |
7b22a4 |
file = fopen(optarg, "w");
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Packit |
7b22a4 |
if (file == NULL) {
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Packit |
7b22a4 |
fprintf(stderr, "Failed to open file, error: %s\n",
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Packit |
7b22a4 |
strerror(errno));
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Packit |
7b22a4 |
exit(1);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
ret = dup2(fileno(file), STDOUT_FILENO);
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Packit |
7b22a4 |
if (ret == -1) {
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Packit |
7b22a4 |
fprintf(stderr, "Failed to redirect stdout, error: %s\n",
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Packit |
7b22a4 |
strerror(errno));
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Packit |
7b22a4 |
exit(1);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
fclose(file);
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Packit |
7b22a4 |
break;
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Packit |
7b22a4 |
case 'd':
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Packit |
7b22a4 |
do_output(cb, tablename);
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Packit |
7b22a4 |
exit(0);
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Packit |
7b22a4 |
case 'V':
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Packit |
7b22a4 |
printf("%s v%s (legacy)\n",
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Packit |
7b22a4 |
xt_params->program_name,
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Packit |
7b22a4 |
xt_params->program_version);
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Packit |
7b22a4 |
exit(0);
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Packit |
7b22a4 |
default:
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Packit |
7b22a4 |
fprintf(stderr,
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Packit |
7b22a4 |
"Look at manual page `%s.8' for more information.\n",
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Packit |
7b22a4 |
xt_params->program_name);
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Packit |
7b22a4 |
exit(1);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
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Packit |
7b22a4 |
if (optind < argc) {
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Packit |
7b22a4 |
fprintf(stderr, "Unknown arguments found on commandline\n");
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Packit |
7b22a4 |
exit(1);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
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Packit |
7b22a4 |
return !do_output(cb, tablename);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
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Packit |
7b22a4 |
#ifdef ENABLE_IPV4
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Packit |
7b22a4 |
static void iptables_dump_rules(const char *chain, struct xtc_handle *h)
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Packit |
7b22a4 |
{
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Packit |
7b22a4 |
const struct ipt_entry *e;
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Packit |
7b22a4 |
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Packit |
7b22a4 |
/* Dump out rules */
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Packit |
7b22a4 |
e = iptc_first_rule(chain, h);
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Packit |
7b22a4 |
while(e) {
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Packit |
7b22a4 |
print_rule4(e, h, chain, show_counters);
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Packit |
7b22a4 |
e = iptc_next_rule(e, h);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
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Packit |
7b22a4 |
struct iptables_save_cb ipt_save_cb = {
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Packit |
7b22a4 |
.ops = &iptc_ops,
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Packit |
7b22a4 |
.dump_rules = iptables_dump_rules,
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Packit |
7b22a4 |
};
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Packit |
7b22a4 |
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Packit |
7b22a4 |
/* Format:
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Packit |
7b22a4 |
* :Chain name POLICY packets bytes
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Packit |
7b22a4 |
* rule
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Packit |
7b22a4 |
*/
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Packit |
7b22a4 |
int
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Packit |
7b22a4 |
iptables_save_main(int argc, char *argv[])
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Packit |
7b22a4 |
{
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Packit |
7b22a4 |
iptables_globals.program_name = "iptables-save";
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Packit |
7b22a4 |
if (xtables_init_all(&iptables_globals, NFPROTO_IPV4) < 0) {
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Packit |
7b22a4 |
fprintf(stderr, "%s/%s Failed to initialize xtables\n",
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Packit |
7b22a4 |
iptables_globals.program_name,
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Packit |
7b22a4 |
iptables_globals.program_version);
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Packit |
7b22a4 |
exit(1);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS)
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Packit |
7b22a4 |
init_extensions();
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Packit |
7b22a4 |
init_extensions4();
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Packit |
7b22a4 |
#endif
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Packit |
7b22a4 |
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Packit |
7b22a4 |
return do_iptables_save(&ipt_save_cb, argc, argv);
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Packit |
7b22a4 |
}
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Packit |
7b22a4 |
#endif /* ENABLE_IPV4 */
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Packit |
7b22a4 |
|
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Packit |
7b22a4 |
#ifdef ENABLE_IPV6
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Packit |
7b22a4 |
static void ip6tables_dump_rules(const char *chain, struct xtc_handle *h)
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Packit |
7b22a4 |
{
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Packit |
7b22a4 |
const struct ip6t_entry *e;
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Packit |
7b22a4 |
|
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Packit |
7b22a4 |
/* Dump out rules */
|
|
Packit |
7b22a4 |
e = ip6tc_first_rule(chain, h);
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|
Packit |
7b22a4 |
while(e) {
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|
Packit |
7b22a4 |
print_rule6(e, h, chain, show_counters);
|
|
Packit |
7b22a4 |
e = ip6tc_next_rule(e, h);
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|
Packit |
7b22a4 |
}
|
|
Packit |
7b22a4 |
}
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Packit |
7b22a4 |
|
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Packit |
7b22a4 |
struct iptables_save_cb ip6t_save_cb = {
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Packit |
7b22a4 |
.ops = &ip6tc_ops,
|
|
Packit |
7b22a4 |
.dump_rules = ip6tables_dump_rules,
|
|
Packit |
7b22a4 |
};
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|
Packit |
7b22a4 |
|
|
Packit |
7b22a4 |
/* Format:
|
|
Packit |
7b22a4 |
* :Chain name POLICY packets bytes
|
|
Packit |
7b22a4 |
* rule
|
|
Packit |
7b22a4 |
*/
|
|
Packit |
7b22a4 |
int
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Packit |
7b22a4 |
ip6tables_save_main(int argc, char *argv[])
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|
Packit |
7b22a4 |
{
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|
Packit |
7b22a4 |
ip6tables_globals.program_name = "ip6tables-save";
|
|
Packit |
7b22a4 |
if (xtables_init_all(&ip6tables_globals, NFPROTO_IPV6) < 0) {
|
|
Packit |
7b22a4 |
fprintf(stderr, "%s/%s Failed to initialize xtables\n",
|
|
Packit |
7b22a4 |
ip6tables_globals.program_name,
|
|
Packit |
7b22a4 |
ip6tables_globals.program_version);
|
|
Packit |
7b22a4 |
exit(1);
|
|
Packit |
7b22a4 |
}
|
|
Packit |
7b22a4 |
#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS)
|
|
Packit |
7b22a4 |
init_extensions();
|
|
Packit |
7b22a4 |
init_extensions6();
|
|
Packit |
7b22a4 |
#endif
|
|
Packit |
7b22a4 |
|
|
Packit |
7b22a4 |
return do_iptables_save(&ip6t_save_cb, argc, argv);
|
|
Packit |
7b22a4 |
}
|
|
Packit |
7b22a4 |
#endif /* ENABLE_IPV6 */
|