#!/bin/bash
# -------
# File:        llxcfg-dnsd
# Description: LliureX DNS command line utility
# Author:      Luis Atonio Garcia Gisbert <garcia_luigis@gva.es>
# 
# 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., 
# 51 Franklin St, Fifth Floor, Boston MA 02110-1301 USA
# --------

set -e

# variables
# ---------

CPKGS="dns"

# functions
# ---------

usage(){
   CMD="$(basename "$0")"
   exit_message \
"Usage: $CMD {start|stop|restart|reload|allow|deny|info|listfiles|update|revert|cpkgs}\n\
       $CMD grepinfo FIELD\n\
       $CMD {addalias|delalias} HOSTNAME HOSTALIAS1 [ HOSTALIAS2 ... HOSTALIASN ]\n\
       $CMD {listalias} HOSTNAME\n\
       options: -u|--update"
}

exit_message() {
   echo -e "$1" >&2
   exit 1
}

test_hostname(){
   [ -z "${1}" ] && exit_message "Missing hostname !!"
   return 0
}

test_alias(){
   [ -z "${1}" ]  && exit_message "Missing aliases !!"
   return 0
}

test_hostnum(){
   [ -z "${1}" ] && exit_message "Invalid hostname !!"
   return 0
}

# main
# ---------

LIB_FILE="/usr/share/lliurex/lliurex-srv-common/lliurex-netfuncs.sh"
[ -e "$LIB_FILE" ] || exit_message "No se encuentra la libreria ${LIB_FILE}"
. ${LIB_FILE}

case "$1" in
   -u|--update)
      AUTOUPDATE="Y"
      shift
      ;;
esac
ACTION="$1"
rc=0

case "$ACTION" in
   start|stop|restart|reload)
      llxcfg-cpkg invoke "$ACTION" $CPKGS || rc=$?
      exit $rc
    ;;
  cpkgs)
    for c in $CPKGS ; do
       echo $c
    done
    exit 0
    ;;
  allow|deny|listfiles|update|revert|info)
    llxcfg-cpkg "$ACTION" $CPKGS || rc=$?
    exit $rc
    ;;
  grepinfo)
    [ "$2" ] || usage
    llxcfg-cpkg grepinfo "$2" $CPKGS || rc=$?
    exit $rc
    ;;
  addalias)
    HOST_NAME="$2"
    shift 2
    HOST_ALIAS="$@"
    test_hostname "${HOST_NAME}"
    test_alias "${HOST_ALIAS}"
    HOST_NUM="`get_dhcp_host_num ${HOST_NAME}`"
    test_hostnum "${HOST_NUM}"
    add_dhcp_host_alias ${HOST_NUM} ${HOST_ALIAS}
    ;;
  delalias)
    HOST_NAME="$2"
    shift 2
    HOST_ALIAS="$@"
    test_hostname "${HOST_NAME}"
    test_alias "${HOST_ALIAS}"
    HOST_NUM="`get_dhcp_host_num ${HOST_NAME}`"
    test_hostnum "${HOST_NUM}"
    del_dhcp_host_alias ${HOST_NUM} ${HOST_ALIAS}
    ;;
  listalias)
    HOST_NAME="$2"
    test_hostname "${HOST_NAME}"
    HOST_NUM="`get_dhcp_host_num ${HOST_NAME}`"
    test_hostnum "${HOST_NUM}"
    get_dhcp_host_alias ${HOST_NUM}
    ;;
  *)
      usage
    ;;
esac

[ -z "$AUTOUPDATE" ] || llxcfg-cpkg update $CPKGS || rc=$?
exit $rc