/* Code to save the xtables state, in human readable-form. */
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/* (C) 1999 by Paul 'Rusty' Russell <rusty@rustcorp.com.au> and
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* (C) 2000-2002 by Harald Welte <laforge@gnumonks.org>
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* (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
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*
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* This code is distributed under the terms of GNU GPL v2
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*
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*/
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#include <getopt.h>
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#include <errno.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <netdb.h>
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#include "libiptc/libiptc.h"
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#include "iptables.h"
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#include "xtables-multi.h"
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#include "nft.h"
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#include <libnftnl/chain.h>
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#ifndef NO_SHARED_LIBS
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#include <dlfcn.h>
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#endif
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static bool show_counters = false;
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static const struct option options[] = {
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{.name = "counters", .has_arg = false, .val = 'c'},
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{.name = "dump", .has_arg = false, .val = 'd'},
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{.name = "table", .has_arg = true, .val = 't'},
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{.name = "modprobe", .has_arg = true, .val = 'M'},
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{.name = "ipv4", .has_arg = false, .val = '4'},
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{.name = "ipv6", .has_arg = false, .val = '6'},
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{NULL},
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};
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static int
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do_output(struct nft_handle *h, const char *tablename, bool counters)
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{
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struct nftnl_chain_list *chain_list;
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if (!tablename)
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return nft_for_each_table(h, do_output, counters);
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if (!nft_table_find(h, tablename)) {
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printf("Table `%s' does not exist\n", tablename);
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return 0;
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}
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chain_list = nft_chain_dump(h);
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time_t now = time(NULL);
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printf("# Generated by xtables-save v%s on %s",
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IPTABLES_VERSION, ctime(&now));
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printf("*%s\n", tablename);
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/* Dump out chain names first,
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* thereby preventing dependency conflicts */
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nft_chain_save(h, chain_list, tablename);
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nft_rule_save(h, tablename, counters);
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now = time(NULL);
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printf("COMMIT\n");
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printf("# Completed on %s", ctime(&now));
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return 1;
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}
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/* Format:
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* :Chain name POLICY packets bytes
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* rule
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*/
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static int
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xtables_save_main(int family, const char *progname, int argc, char *argv[])
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{
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const char *tablename = NULL;
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bool dump = false;
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struct nft_handle h = {
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.family = family,
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};
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int c;
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xtables_globals.program_name = progname;
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c = xtables_init_all(&xtables_globals, family);
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if (c < 0) {
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fprintf(stderr, "%s/%s Failed to initialize xtables\n",
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xtables_globals.program_name,
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xtables_globals.program_version);
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exit(1);
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}
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#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS)
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init_extensions();
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init_extensions4();
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#endif
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if (nft_init(&h, xtables_ipv4) < 0) {
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fprintf(stderr, "%s/%s Failed to initialize nft: %s\n",
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xtables_globals.program_name,
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xtables_globals.program_version,
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strerror(errno));
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exit(EXIT_FAILURE);
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}
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while ((c = getopt_long(argc, argv, "bcdt:M:46", options, NULL)) != -1) {
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switch (c) {
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case 'b':
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fprintf(stderr, "-b/--binary option is not implemented\n");
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break;
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case 'c':
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show_counters = true;
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break;
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case 't':
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/* Select specific table. */
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tablename = optarg;
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break;
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case 'M':
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xtables_modprobe_program = optarg;
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break;
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case 'd':
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dump = true;
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break;
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case '4':
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h.family = AF_INET;
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break;
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case '6':
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h.family = AF_INET6;
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xtables_set_nfproto(AF_INET6);
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break;
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}
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}
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if (optind < argc) {
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fprintf(stderr, "Unknown arguments found on commandline\n");
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exit(1);
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}
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if (nft_is_ruleset_compatible(&h) == 1) {
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printf("ERROR: You're using nft features that cannot be mapped to iptables, please keep using nft.\n");
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exit(EXIT_FAILURE);
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}
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if (dump) {
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do_output(&h, tablename, show_counters);
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exit(0);
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}
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return !do_output(&h, tablename, show_counters);
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}
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int xtables_ip4_save_main(int argc, char *argv[])
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{
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return xtables_save_main(NFPROTO_IPV4, "iptables-save", argc, argv);
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}
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int xtables_ip6_save_main(int argc, char *argv[])
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{
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return xtables_save_main(NFPROTO_IPV6, "ip6tables-save", argc, argv);
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}
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