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d1fe03 |
/* Code to save the xtables state, in human readable-form. */
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d1fe03 |
/* (C) 1999 by Paul 'Rusty' Russell <rusty@rustcorp.com.au> and
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d1fe03 |
* (C) 2000-2002 by Harald Welte <laforge@gnumonks.org>
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d1fe03 |
* (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
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d1fe03 |
*
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d1fe03 |
* This code is distributed under the terms of GNU GPL v2
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d1fe03 |
*
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d1fe03 |
*/
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d1fe03 |
#include "config.h"
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d1fe03 |
#include <getopt.h>
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d1fe03 |
#include <errno.h>
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d1fe03 |
#include <libgen.h>
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d1fe03 |
#include <stdio.h>
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d1fe03 |
#include <fcntl.h>
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d1fe03 |
#include <stdlib.h>
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d1fe03 |
#include <string.h>
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d1fe03 |
#include <time.h>
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d1fe03 |
#include <netdb.h>
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d1fe03 |
#include <unistd.h>
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d1fe03 |
#include "libiptc/libiptc.h"
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d1fe03 |
#include "iptables.h"
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d1fe03 |
#include "xtables-multi.h"
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d1fe03 |
#include "nft.h"
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d1fe03 |
#include "nft-cache.h"
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d1fe03 |
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d1fe03 |
#include <libnftnl/chain.h>
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d1fe03 |
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d1fe03 |
#ifndef NO_SHARED_LIBS
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d1fe03 |
#include <dlfcn.h>
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d1fe03 |
#endif
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d1fe03 |
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d1fe03 |
#define prog_name xtables_globals.program_name
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d1fe03 |
#define prog_vers xtables_globals.program_version
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d1fe03 |
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d1fe03 |
static const char *ipt_save_optstring = "bcdt:M:f:46V";
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d1fe03 |
static const struct option ipt_save_options[] = {
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d1fe03 |
{.name = "counters", .has_arg = false, .val = 'c'},
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d1fe03 |
{.name = "version", .has_arg = false, .val = 'V'},
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d1fe03 |
{.name = "dump", .has_arg = false, .val = 'd'},
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d1fe03 |
{.name = "table", .has_arg = true, .val = 't'},
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d1fe03 |
{.name = "modprobe", .has_arg = true, .val = 'M'},
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d1fe03 |
{.name = "file", .has_arg = true, .val = 'f'},
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d1fe03 |
{.name = "ipv4", .has_arg = false, .val = '4'},
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d1fe03 |
{.name = "ipv6", .has_arg = false, .val = '6'},
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d1fe03 |
{NULL},
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d1fe03 |
};
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d1fe03 |
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d1fe03 |
static const char *arp_save_optstring = "cM:V";
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d1fe03 |
static const struct option arp_save_options[] = {
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d1fe03 |
{.name = "counters", .has_arg = false, .val = 'c'},
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d1fe03 |
{.name = "version", .has_arg = false, .val = 'V'},
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d1fe03 |
{.name = "modprobe", .has_arg = true, .val = 'M'},
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d1fe03 |
{NULL},
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d1fe03 |
};
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d1fe03 |
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d1fe03 |
static const char *ebt_save_optstring = "ct:M:V";
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d1fe03 |
static const struct option ebt_save_options[] = {
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d1fe03 |
{.name = "counters", .has_arg = false, .val = 'c'},
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d1fe03 |
{.name = "version", .has_arg = false, .val = 'V'},
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d1fe03 |
{.name = "table", .has_arg = true, .val = 't'},
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d1fe03 |
{.name = "modprobe", .has_arg = true, .val = 'M'},
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d1fe03 |
{NULL},
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d1fe03 |
};
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d1fe03 |
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d1fe03 |
struct do_output_data {
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d1fe03 |
unsigned int format;
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d1fe03 |
bool commit;
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d1fe03 |
};
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d1fe03 |
|
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d1fe03 |
static int
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d1fe03 |
__do_output(struct nft_handle *h, const char *tablename, void *data)
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d1fe03 |
{
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d1fe03 |
struct nftnl_chain_list *chain_list;
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d1fe03 |
struct do_output_data *d = data;
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d1fe03 |
time_t now;
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d1fe03 |
|
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d1fe03 |
if (!nft_table_builtin_find(h, tablename))
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d1fe03 |
return 0;
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d1fe03 |
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d1fe03 |
if (!nft_is_table_compatible(h, tablename, NULL)) {
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d1fe03 |
printf("# Table `%s' is incompatible, use 'nft' tool.\n",
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|
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d1fe03 |
tablename);
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d1fe03 |
return 0;
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d1fe03 |
}
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d1fe03 |
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d1fe03 |
chain_list = nft_chain_list_get(h, tablename, NULL);
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d1fe03 |
if (!chain_list)
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d1fe03 |
return 0;
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d1fe03 |
|
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d1fe03 |
now = time(NULL);
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|
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d1fe03 |
printf("# Generated by %s v%s on %s", prog_name,
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|
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d1fe03 |
prog_vers, ctime(&now));
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d1fe03 |
|
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d1fe03 |
printf("*%s\n", tablename);
|
|
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d1fe03 |
/* Dump out chain names first,
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|
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d1fe03 |
* thereby preventing dependency conflicts */
|
|
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d1fe03 |
nft_chain_save(h, chain_list);
|
|
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d1fe03 |
nft_rule_save(h, tablename, d->format);
|
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d1fe03 |
if (d->commit)
|
|
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d1fe03 |
printf("COMMIT\n");
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|
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d1fe03 |
|
|
Packit Service |
d1fe03 |
now = time(NULL);
|
|
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d1fe03 |
printf("# Completed on %s", ctime(&now));
|
|
Packit Service |
d1fe03 |
return 0;
|
|
Packit Service |
d1fe03 |
}
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|
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d1fe03 |
|
|
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d1fe03 |
static int
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|
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d1fe03 |
do_output(struct nft_handle *h, const char *tablename, struct do_output_data *d)
|
|
Packit Service |
d1fe03 |
{
|
|
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d1fe03 |
int ret;
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
if (!tablename) {
|
|
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d1fe03 |
ret = nft_for_each_table(h, __do_output, d);
|
|
Packit Service |
d1fe03 |
nft_check_xt_legacy(h->family, true);
|
|
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d1fe03 |
return !!ret;
|
|
Packit Service |
d1fe03 |
}
|
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d1fe03 |
|
|
Packit Service |
d1fe03 |
if (!nft_table_find(h, tablename) &&
|
|
Packit Service |
d1fe03 |
!nft_table_builtin_find(h, tablename)) {
|
|
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d1fe03 |
fprintf(stderr, "Table `%s' does not exist\n", tablename);
|
|
Packit Service |
d1fe03 |
return 1;
|
|
Packit Service |
d1fe03 |
}
|
|
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d1fe03 |
|
|
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d1fe03 |
ret = __do_output(h, tablename, d);
|
|
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d1fe03 |
nft_check_xt_legacy(h->family, true);
|
|
Packit Service |
d1fe03 |
return ret;
|
|
Packit Service |
d1fe03 |
}
|
|
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d1fe03 |
|
|
Packit Service |
d1fe03 |
/* Format:
|
|
Packit Service |
d1fe03 |
* :Chain name POLICY packets bytes
|
|
Packit Service |
d1fe03 |
* rule
|
|
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d1fe03 |
*/
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|
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d1fe03 |
static int
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|
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d1fe03 |
xtables_save_main(int family, int argc, char *argv[],
|
|
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d1fe03 |
const char *optstring, const struct option *longopts)
|
|
Packit Service |
d1fe03 |
{
|
|
Packit Service |
d1fe03 |
const struct builtin_table *tables;
|
|
Packit Service |
d1fe03 |
const char *tablename = NULL;
|
|
Packit Service |
d1fe03 |
struct do_output_data d = {
|
|
Packit Service |
d1fe03 |
.format = FMT_NOCOUNTS,
|
|
Packit Service |
d1fe03 |
};
|
|
Packit Service |
d1fe03 |
bool dump = false;
|
|
Packit Service |
d1fe03 |
struct nft_handle h = {
|
|
Packit Service |
d1fe03 |
.family = family,
|
|
Packit Service |
d1fe03 |
};
|
|
Packit Service |
d1fe03 |
FILE *file = NULL;
|
|
Packit Service |
d1fe03 |
int ret, c;
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
xtables_globals.program_name = basename(*argv);;
|
|
Packit Service |
d1fe03 |
c = xtables_init_all(&xtables_globals, family);
|
|
Packit Service |
d1fe03 |
if (c < 0) {
|
|
Packit Service |
d1fe03 |
fprintf(stderr, "%s/%s Failed to initialize xtables\n",
|
|
Packit Service |
d1fe03 |
xtables_globals.program_name,
|
|
Packit Service |
d1fe03 |
xtables_globals.program_version);
|
|
Packit Service |
d1fe03 |
exit(1);
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
while ((c = getopt_long(argc, argv, optstring, longopts, NULL)) != -1) {
|
|
Packit Service |
d1fe03 |
switch (c) {
|
|
Packit Service |
d1fe03 |
case 'b':
|
|
Packit Service |
d1fe03 |
fprintf(stderr, "-b/--binary option is not implemented\n");
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
case 'c':
|
|
Packit Service |
d1fe03 |
d.format &= ~FMT_NOCOUNTS;
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
case 't':
|
|
Packit Service |
d1fe03 |
/* Select specific table. */
|
|
Packit Service |
d1fe03 |
tablename = optarg;
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
case 'M':
|
|
Packit Service |
d1fe03 |
xtables_modprobe_program = optarg;
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
case 'f':
|
|
Packit Service |
d1fe03 |
file = fopen(optarg, "w");
|
|
Packit Service |
d1fe03 |
if (file == NULL) {
|
|
Packit Service |
d1fe03 |
fprintf(stderr, "Failed to open file, error: %s\n",
|
|
Packit Service |
d1fe03 |
strerror(errno));
|
|
Packit Service |
d1fe03 |
exit(1);
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
ret = dup2(fileno(file), STDOUT_FILENO);
|
|
Packit Service |
d1fe03 |
if (ret == -1) {
|
|
Packit Service |
d1fe03 |
fprintf(stderr, "Failed to redirect stdout, error: %s\n",
|
|
Packit Service |
d1fe03 |
strerror(errno));
|
|
Packit Service |
d1fe03 |
exit(1);
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
fclose(file);
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
case 'd':
|
|
Packit Service |
d1fe03 |
dump = true;
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
case '4':
|
|
Packit Service |
d1fe03 |
h.family = AF_INET;
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
case '6':
|
|
Packit Service |
d1fe03 |
h.family = AF_INET6;
|
|
Packit Service |
d1fe03 |
xtables_set_nfproto(AF_INET6);
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
case 'V':
|
|
Packit Service |
d1fe03 |
printf("%s v%s (nf_tables)\n", prog_name, prog_vers);
|
|
Packit Service |
d1fe03 |
exit(0);
|
|
Packit Service |
d1fe03 |
default:
|
|
Packit Service |
d1fe03 |
fprintf(stderr,
|
|
Packit Service |
d1fe03 |
"Look at manual page `%s.8' for more information.\n",
|
|
Packit Service |
d1fe03 |
prog_name);
|
|
Packit Service |
d1fe03 |
exit(1);
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
if (optind < argc) {
|
|
Packit Service |
d1fe03 |
fprintf(stderr, "Unknown arguments found on commandline\n");
|
|
Packit Service |
d1fe03 |
exit(1);
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
switch (family) {
|
|
Packit Service |
d1fe03 |
case NFPROTO_IPV4:
|
|
Packit Service |
d1fe03 |
case NFPROTO_IPV6: /* fallthough, same table */
|
|
Packit Service |
d1fe03 |
#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS)
|
|
Packit Service |
d1fe03 |
init_extensions();
|
|
Packit Service |
d1fe03 |
init_extensions4();
|
|
Packit Service |
d1fe03 |
#endif
|
|
Packit Service |
d1fe03 |
tables = xtables_ipv4;
|
|
Packit Service |
d1fe03 |
d.commit = true;
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
case NFPROTO_ARP:
|
|
Packit Service |
d1fe03 |
tables = xtables_arp;
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
case NFPROTO_BRIDGE: {
|
|
Packit Service |
d1fe03 |
const char *ctr = getenv("EBTABLES_SAVE_COUNTER");
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
if (!(d.format & FMT_NOCOUNTS)) {
|
|
Packit Service |
d1fe03 |
d.format |= FMT_EBT_SAVE;
|
|
Packit Service |
d1fe03 |
} else if (ctr && !strcmp(ctr, "yes")) {
|
|
Packit Service |
d1fe03 |
d.format &= ~FMT_NOCOUNTS;
|
|
Packit Service |
d1fe03 |
d.format |= FMT_C_COUNTS | FMT_EBT_SAVE;
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
tables = xtables_bridge;
|
|
Packit Service |
d1fe03 |
break;
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
default:
|
|
Packit Service |
d1fe03 |
fprintf(stderr, "Unknown family %d\n", family);
|
|
Packit Service |
d1fe03 |
return 1;
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
if (nft_init(&h, tables) < 0) {
|
|
Packit Service |
d1fe03 |
fprintf(stderr, "%s/%s Failed to initialize nft: %s\n",
|
|
Packit Service |
d1fe03 |
xtables_globals.program_name,
|
|
Packit Service |
d1fe03 |
xtables_globals.program_version,
|
|
Packit Service |
d1fe03 |
strerror(errno));
|
|
Packit Service |
d1fe03 |
exit(EXIT_FAILURE);
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
h.ops = nft_family_ops_lookup(h.family);
|
|
Packit Service |
d1fe03 |
if (!h.ops)
|
|
Packit Service |
d1fe03 |
xtables_error(PARAMETER_PROBLEM, "Unknown family");
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
ret = do_output(&h, tablename, &d);
|
|
Packit Service |
d1fe03 |
nft_fini(&h);
|
|
Packit Service |
d1fe03 |
if (dump)
|
|
Packit Service |
d1fe03 |
exit(0);
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
return ret;
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
int xtables_ip4_save_main(int argc, char *argv[])
|
|
Packit Service |
d1fe03 |
{
|
|
Packit Service |
d1fe03 |
return xtables_save_main(NFPROTO_IPV4, argc, argv,
|
|
Packit Service |
d1fe03 |
ipt_save_optstring, ipt_save_options);
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
int xtables_ip6_save_main(int argc, char *argv[])
|
|
Packit Service |
d1fe03 |
{
|
|
Packit Service |
d1fe03 |
return xtables_save_main(NFPROTO_IPV6, argc, argv,
|
|
Packit Service |
d1fe03 |
ipt_save_optstring, ipt_save_options);
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
int xtables_eb_save_main(int argc, char *argv[])
|
|
Packit Service |
d1fe03 |
{
|
|
Packit Service |
d1fe03 |
return xtables_save_main(NFPROTO_BRIDGE, argc, argv,
|
|
Packit Service |
d1fe03 |
ebt_save_optstring, ebt_save_options);
|
|
Packit Service |
d1fe03 |
}
|
|
Packit Service |
d1fe03 |
|
|
Packit Service |
d1fe03 |
int xtables_arp_save_main(int argc, char *argv[])
|
|
Packit Service |
d1fe03 |
{
|
|
Packit Service |
d1fe03 |
return xtables_save_main(NFPROTO_ARP, argc, argv,
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|
Packit Service |
d1fe03 |
arp_save_optstring, arp_save_options);
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|
Packit Service |
d1fe03 |
}
|