#!/bin/sh

#
# save routes.sh
# Copyright (C) 2010 System-Linux.eu
#
#  This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

PG_NAME=$0
PG_VERSION="0.1a"
SAVE_DEFAULT_GW=1

print_help ()
{
  printf \
"Usage: %s [OPTION]\n\
Dump the current running routing table\n\n\
\t-n, --no-default-gw\tNot print the default gateway.\n\
\t-h, --help\t\tPrint help\n" $PG_NAME

}

die ()
{
  if [ "$1" ]; then
    echo -e $1
  fi

  exit 1
}

dump_using_nt ()
{
  which route >/dev/null || die

  if [ $SAVE_DEFAULT_GW -eq 1 ] ;then
    GW_CMD="cat"
  else
    GW_CMD="head -n -1"
  fi

  route -n | `echo $GW_CMD`  | awk '($4 ~ /G/) {
   if ($3 == "255.255.255.255")
    {
     printf "route add -host %s metric %s gw %s\n", $1, $5, $2
    }
   else
     printf "route add -net %s netmask %s metric %s gw %s\n", $1, $3, $5, $2
    }'
}

for argv in $@
do
  case "$argv" in
    --version)
      echo "$PG_NAME version $PG_VERSION"
      exit 0
    ;;
    -n | --no-default-gw)
    SAVE_DEFAULT_GW=0
    ;;
    -h | --help)
      print_help
      exit 0
    ;;
    *)
      print_help
      exit 1
    ;;

  esac
done

dump_using_nt

exit 0