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 #ifdef IPTABLES_MULTI
  42 int
  43 iptables_main(int argc, char *argv[])
  44 #else
  45 int
  46 main(int argc, char *argv[])
  47 #endif
  48 {
  49         int ret;
  50         char *table = "filter";
  51         struct iptc_handle *handle = NULL;
  52
  53         program_name = "iptables";
  54         program_version = XTABLES_VERSION;
  55
  56         lib_dir = getenv("XTABLES_LIBDIR");
  57         if (lib_dir == NULL) {
  58                 lib_dir = getenv("IPTABLES_LIB_DIR");
  59                 if (lib_dir != NULL)
  60                         fprintf(stderr, "IPTABLES_LIB_DIR is deprecated\n");
  61         }
  62         if (lib_dir == NULL)
  63                 lib_dir = XTABLES_LIBDIR;
  64
  65 #ifdef NO_SHARED_LIBS
  66         init_extensions();
  67 #endif
  68
  69         ret = do_command(argc, argv, &table, &handle);
  70         if (ret) {
  71                 ret = iptc_commit(handle);
  72                 iptc_free(handle);
  73         }
  74
  75         if (!ret) {
  76                 fprintf(stderr, "iptables: %s. "
  77                                 "Run `dmesg' for more information.\n",
  78                         iptc_strerror(errno));
  79                 if (errno == EAGAIN) {
  80                         exit(RESOURCE_PROBLEM);
  81                 }
  82         }
  83
  84         exit(!ret);
  85 }