functions.radvd

   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 RADVD_CONFIGFILE="/etc/radvd.conf"
  23
  24 function radvd_update() {
  25         # (Re-)write the configuration file
  26         radvd_write_config
  27
  28         # Reload the radvd service.
  29         service_reload radvd
  30 }
  31
  32 function radvd_write_config() {
  33         # Clear the config file.
  34         __radvd_clear
  35
  36         # Write header to the file.
  37         __radvd_write "#"
  38         __radvd_write "# This is the radvd daemon configuration file."
  39         __radvd_write "# THIS FILE IS AUTOMATICALLY GENERATED AND WILL OVERWRITE"
  40         __radvd_write "# ANY CUSTOM CHANGES!"
  41         __radvd_write "#"
  42         __radvd_write "# $(date -u)"
  43         __radvd_write "#\n"
  44
  45         # Write the configuration for all zones.
  46         local zone
  47         for zone in $(zones_get_local); do
  48                 __radvd_config_interface ${zone}
  49         done
  50 }
  51
  52 function radvd_clear() {
  53         __radvd_clear
  54 }
  55
  56 function __radvd_clear() {
  57         log DEBUG "Clearing radvd config file."
  58
  59         : > ${RADVD_CONFIGFILE}
  60 }
  61
  62 function __radvd_write() {
  63         echo -e "$@" >> ${RADVD_CONFIGFILE}
  64 }
  65
  66 function __radvd_config_interface() {
  67         local zone=${1}
  68         shift
  69
  70         assert isset zone
  71
  72         log DEBUG "Writing radvd configuration for ${zone}"
  73
  74         # If the interface does not provide any routing information,
  75         # we can skip this whole stuff.
  76         if ! routing_db_exists ${zone} ipv6; then
  77                 return ${EXIT_OK}
  78         fi
  79
  80         # Skip if zone is not active.
  81         local active=$(routing_db_get ${zone} ipv6 active)
  82         [ "${active}" = "0" ] && return ${EXIT_OK}
  83
  84         # Skip if there is no prefix or prefix is link-local.
  85         local prefix=$(routing_db_get ${zone} ipv6 local-ip-address)
  86         if [ -z "${prefix}" ] || [ "${prefix:0:5}" = "fe80:" ]; then
  87                 return ${EXIT_OK}
  88         fi
  89
  90         __radvd_write "interface ${zone} {"
  91         __radvd_write " AdvSendAdvert on;"
  92         __radvd_write " MinRtrAdvInterval 3;"
  93         __radvd_write " MaxRtrAdvInterval 10;"
  94         __radvd_write " IgnoreIfMissing on;"
  95         __radvd_write ""
  96         __radvd_write " prefix ${prefix} {"
  97         __radvd_write "         AdvOnLink on;"
  98         __radvd_write "         AdvAutonomous on;"
  99         __radvd_write "         AdvRouterAddr on;"
 100         __radvd_write " };"
 101         __radvd_write "};\n"
 102 }