contrib/fwd/src/fwd.c

   1 /*
   2  * fwd - OpenWrt firewall daemon - main part
   3  *
   4  *   Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
   5  *
   6  * The fwd program is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation.
   9  *
  10  * The fwd program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with the fwd program. If not, see http://www.gnu.org/licenses/.
  17  */
  18
  19
  20 #include "fwd.h"
  21 #include "fwd_addr.h"
  22 #include "fwd_rules.h"
  23 #include "fwd_config.h"
  24 #include "fwd_xtables.h"
  25
  26
  27 int main(int argc, const char *argv[])
  28 {
  29         struct fwd_handle *h;
  30
  31         if( getuid() > 0 )
  32                 fwd_fatal("Need root permissions!");
  33
  34         if( !(h = fwd_alloc_ptr(struct fwd_handle)) )
  35                 fwd_fatal("Out of memory");
  36
  37         if( !(h->conf = fwd_read_config()) )
  38                 fwd_fatal("Failed to read configuration");
  39
  40         if( (h->rtnl_socket = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) == -1 )
  41                 fwd_fatal("Failed to create AF_NETLINK socket (%m)");
  42
  43         if( !(h->addrs = fwd_get_addrs(h->rtnl_socket, AF_INET)) )
  44                 fwd_fatal("Failed to issue RTM_GETADDR (%m)");
  45
  46         fwd_ipt_build_ruleset(h);
  47
  48         fwd_ipt_addif(h, "lan");
  49         fwd_ipt_addif(h, "wan");
  50
  51         sleep(1);
  52
  53         fwd_ipt_delif(h, "wan");
  54         fwd_ipt_delif(h, "lan");
  55
  56         fwd_ipt_clear_ruleset(h);
  57
  58         close(h->rtnl_socket);
  59         fwd_free_config(h->conf);
  60         fwd_free_addrs(h->addrs);
  61         fwd_free_ptr(h);
  62
  63         return 0;
  64 }