iptables/iptables-standalone.c

   1 /*
   2  * Author: Paul.Russell@rustcorp.com.au and mneuling@radlogic.com.au
   3  *
   4  * Based on the ipchains code by Paul Russell and Michael Neuling
   5  *
   6  * (C) 2000-2002 by the netfilter coreteam <coreteam@netfilter.org>:
   7  *                  Paul 'Rusty' Russell <rusty@rustcorp.com.au>
   8  *                  Marc Boucher <marc+nf@mbsi.ca>
   9  *                  James Morris <jmorris@intercode.com.au>
  10  *                  Harald Welte <laforge@gnumonks.org>
  11  *                  Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
  12  *
  13  *      iptables -- IP firewall administration for kernels with
  14  *      firewall table (aimed for the 2.3 kernels)
  15  *
  16  *      See the accompanying manual page iptables(8) for information
  17  *      about proper usage of this program.
  18  *
  19  *      This program is free software; you can redistribute it and/or modify
  20  *      it under the terms of the GNU General Public License as published by
  21  *      the Free Software Foundation; either version 2 of the License, or
  22  *      (at your option) any later version.
  23  *
  24  *      This program is distributed in the hope that it will be useful,
  25  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  *      GNU General Public License for more details.
  28  *
  29  *      You should have received a copy of the GNU General Public License
  30  *      along with this program; if not, write to the Free Software
  31  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  32  */
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <errno.h>
  37 #include <string.h>
  38 #include <iptables.h>
  39 #include "iptables-multi.h"
  40
  41 int
  42 iptables_main(int argc, char *argv[])
  43 {
  44         int ret;
  45         char *table = "filter";
  46         struct xtc_handle *handle = NULL;
  47
  48         iptables_globals.program_name = "iptables";
  49         ret = xtables_init_all(&iptables_globals, NFPROTO_IPV4);
  50         if (ret < 0) {
  51                 fprintf(stderr, "%s/%s Failed to initialize xtables\n",
  52                                 iptables_globals.program_name,
  53                                 iptables_globals.program_version);
  54                                 exit(1);
  55         }
  56         init_extensions();
  57         init_extensions4();
  58
  59         ret = do_command4(argc, argv, &table, &handle, false);
  60         if (ret) {
  61                 ret = iptc_commit(handle);
  62                 iptc_free(handle);
  63         }
  64
  65         xtables_fini();
  66
  67         if (!ret) {
  68                 if (errno == EINVAL) {
  69                         fprintf(stderr, "iptables: %s. "
  70                                         "Run `dmesg' for more information.\n",
  71                                 iptc_strerror(errno));
  72                 } else {
  73                         fprintf(stderr, "iptables: %s.\n",
  74                                 iptc_strerror(errno));
  75                 }
  76                 if (errno == EAGAIN)
  77                         exit(RESOURCE_PROBLEM);
  78         }
  79
  80         exit(!ret);
  81 }