hooks/bridge.configs/ipv4-static

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2010  Michael Tremer & Christian Schmidt                      #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 . /lib/network/header-port
  23
  24 HOOK_SETTINGS="HOOK ADDRESS PREFIX GATEWAY"
  25
  26 function _check() {
  27         assert isset ADDRESS
  28         assert isinteger PREFIX
  29
  30         if [ ${PREFIX} -gt 30 ]; then
  31                 error "PREFIX is greater than 30."
  32                 exit ${EXIT_ERROR}
  33         fi
  34 }
  35
  36 function _create() {
  37         local zone=${1}
  38         shift
  39
  40         while [ $# -gt 0 ]; do
  41                 case "${1}" in
  42                         --address=*)
  43                                 ADDRESS=${1#--address=}
  44                                 ;;
  45                         --netmask=*)
  46                                 NETMASK=${1#--netmask=}
  47                                 ;;
  48                         --prefix=*)
  49                                 PREFIX=${1#--prefix=}
  50                                 ;;
  51                         --gateway=*)
  52                                 GATEWAY=${1#--gateway=}
  53                                 ;;
  54                 esac
  55                 shift
  56         done
  57
  58         if [ -z "${PREFIX}" -a -n "${NETMASK}" ]; then
  59                 PREFIX=$(ipv4_mask_to_cidr ${NETMASK})
  60         fi
  61
  62         config_write $(zone_dir ${zone})/config.${HOOK}.$(uuid) ${HOOK_SETTINGS}
  63
  64         exit ${EXIT_OK}
  65 }
  66
  67 function _up() {
  68         local zone=${1}
  69         local config=${2}
  70         shift 2
  71
  72         if ! device_exists ${zone}; then
  73                 error "Zone '${zone}' doesn't exist."
  74                 exit ${EXIT_ERROR}
  75         fi
  76
  77         config_read $(zone_dir ${zone})/${config}
  78
  79         if ! zone_has_ipv4 ${zone} ${ADDRESS}/${PREFIX}; then
  80                 ip addr add ${ADDRESS}/${PREFIX} dev ${zone}
  81         else
  82                 warning "Do not set IPv4 address '${ADDRESS}/${PREFIX}' because it was already configured on zone '${zone}'."
  83         fi
  84
  85         warning "XXX Gateway stuff has to be done."
  86         if [ -n "${GATEWAY}" ]; then
  87                 : # What do we do with the gateway?
  88         fi
  89
  90         exit ${EXIT_OK}
  91 }
  92
  93 function _down() {
  94         local zone=${1}
  95         local config=${2}
  96         shift 2
  97
  98         if ! device_exists ${zone}; then
  99                 error "Zone '${zone}' doesn't exist."
 100                 exit ${EXIT_ERROR}
 101         fi
 102
 103         config_read $(zone_dir ${zone})/${config}
 104
 105         if zone_has_ipv4 ${zone} ${ADDRESS}/${PREFIX}; then
 106                 ip addr del ${ADDRESS}/${PREFIX} dev ${zone}
 107         fi
 108
 109         exit ${EXIT_OK}
 110 }
 111
 112 function ipv4_mask_to_cidr() {
 113         local mask=0
 114
 115         local field
 116         for field in $(tr '.' ' ' <<<${1}); do
 117                 mask=$(( $(( ${mask} << 8 )) | ${field} ))
 118         done
 119
 120         local cidr=0
 121         local x=$(( 128 << 24 )) # 0x80000000
 122
 123         while [ $(( ${x} & ${mask} )) -ne 0 ]; do
 124                 [ ${mask} -eq ${x} ] && mask=0 || mask=$(( ${mask} << 1 ))
 125                 cidr=$((${cidr} + 1))
 126         done
 127
 128         if [ $(( ${mask} & 2147483647 )) -ne 0 ]; then # 2147483647 = 0x7fffffff
 129                 echo "Invalid net mask: $1" >&2
 130         else
 131                 echo ${cidr}
 132         fi
 133 }
 134
 135 run $@