src/functions/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 radvd_update() {
  25         # (Re-)write the configuration file
  26         radvd_write_config
  27
  28         # Reload the radvd service if it is already running
  29         if service_is_active radvd; then
  30                 service_reload radvd
  31                 return ${EXIT_OK}
  32         fi
  33
  34         # Start the radvd service
  35         service_start radvd
  36 }
  37
  38 radvd_write_config() {
  39         config_header "radv daemon configuration file" > ${RADVD_CONFIGFILE}
  40
  41         # Write the configuration for all zones.
  42         local zone
  43         for zone in $(zones_get_local); do
  44                 __radvd_config_interface ${zone}
  45
  46         done >> ${RADVD_CONFIGFILE}
  47
  48         return ${EXIT_OK}
  49 }
  50
  51 __radvd_config_interface() {
  52         local zone=${1}
  53         assert isset zone
  54
  55         log DEBUG "Writing radvd configuration for ${zone}."
  56
  57         # If the interface does not provide any routing information,
  58         # we can skip this whole stuff.
  59         if ! db_exists "${zone}/ipv6"; then
  60                 return ${EXIT_OK}
  61         fi
  62
  63         # Skip if zone is not active.
  64         local active="$(db_get "${zone}/ipv6/active")"
  65         [ "${active}" = "0" ] && return ${EXIT_OK}
  66
  67         # Skip if there is no prefix or prefix is link-local.
  68         local addr="$(db_get "${zone}/ipv6/local-ip-address")"
  69         if [ -z "${addr}" ] || [ "${addr:0:5}" = "fe80:" ]; then
  70                 return ${EXIT_OK}
  71         fi
  72         local prefix=$(ipv6_get_network ${addr})
  73
  74         # Check if the subnet is configured by the DHCP server.
  75         local dhcpd="false"
  76         if dhcpd_subnet_match ipv6 "${prefix}"; then
  77                 dhcpd="true"
  78         fi
  79
  80         print "interface ${zone} {"
  81         print " AdvSendAdvert on;"
  82         print " MinRtrAdvInterval 3;"
  83         print " MaxRtrAdvInterval 10;"
  84         print " IgnoreIfMissing on;"
  85
  86         if enabled dhcpd; then
  87                 print " AdvManagedFlag on;"
  88                 print " AdvOtherConfigFlag on;"
  89         fi
  90
  91         print
  92         print " prefix ::/64 {"
  93         print "         AdvOnLink on;"
  94
  95         if enabled dhcpd; then
  96                 print "         AdvRouterAddr off;"
  97                 print "         AdvAutonomous off;"
  98         else
  99                 print "         AdvRouterAddr on;"
 100                 print "         AdvAutonomous on;"
 101         fi
 102
 103         print " };"
 104         print
 105
 106         # Add the DNS configuration.
 107         __radvd_config_dns ${zone}
 108
 109         print "};"
 110         print
 111 }
 112
 113 __radvd_config_dns() {
 114         local zone=${1}
 115
 116         # Do nothing, when this option is not enabled.
 117         enabled DNS_ADVERTISE_SERVERS || return ${EXIT_OK}
 118
 119         # XXX it is kind of difficult to announce our local
 120         # resolver.
 121
 122         local server servers
 123         for server in $(dns_server_list_sorted); do
 124                 # Filter out non IPv6 addresses.
 125                 ipv6_is_valid ${server} || continue
 126
 127                 servers="${servers} ${server}"
 128         done
 129
 130         # Remove whitespaces.
 131         servers=$(echo ${servers})
 132
 133         # If there are no servers to announce, we stop right here.
 134         if ! isset servers; then
 135                 log DEBUG "No servers to announce."
 136                 return ${EXIT_OK}
 137         fi
 138
 139         print " RDNSS ${servers} {"
 140         print "         # Use the defaults here."
 141         print " };"
 142         print
 143 }