babeld/files/babeld.init

   1 #!/bin/sh /etc/rc.common
   2
   3 . $IPKG_INSTROOT/lib/functions/network.sh
   4
   5 START=70
   6
   7 pidfile='/var/run/babeld.pid'
   8 CONFIGFILE='/var/etc/babeld.conf'
   9 OTHERCONFIGFILE="/etc/babeld.conf"
  10 OTHERCONFIGDIR="/tmp/babeld.d/"
  11 EXTRA_COMMANDS="status"
  12 EXTRA_HELP="        status Dump Babel's table to the log file."
  13
  14 # Options to ignore for the global section (old options that are translated
  15 # for backward compatibility with old configuration files)
  16 ignored_options="carrier_sense assume_wireless no_split_horizon random_router_id multicast_address port hello_interval wired_hello_interval smoothing_half_time duplication_priority local_server conf_file"
  17
  18 # Append a line to the configuration file
  19 cfg_append() {
  20         local value="$1"
  21         echo "$value" >> $CONFIGFILE
  22 }
  23
  24 cfg_append_option() {
  25         local section="$1"
  26         local option="$2"
  27         local value
  28         config_get value "$section" "$option"
  29         # babeld convention for options is '-', not '_'
  30         [ -n "$value" ] && cfg_append "${option//_/-} $value"
  31 }
  32
  33 # Append to the "$buffer" variable
  34 append_ifname() {
  35         local section="$1"
  36         local option="$2"
  37         local switch="$3"
  38         local _name
  39         config_get _name "$section" "$option"
  40         [ -z "$_name" ] && return 0
  41         local ifname=$(uci_get_state network "$_name" ifname "$_name")
  42         append buffer "$switch $ifname"
  43 }
  44
  45 append_bool() {
  46         local section="$1"
  47         local option="$2"
  48         local value="$3"
  49         local _loctmp
  50         config_get_bool _loctmp "$section" "$option" 0
  51         [ "$_loctmp" -gt 0 ] && append buffer "$value"
  52 }
  53
  54 append_parm() {
  55         local section="$1"
  56         local option="$2"
  57         local switch="$3"
  58         local _loctmp
  59         config_get _loctmp "$section" "$option"
  60         [ -z "$_loctmp" ] && return 0
  61         append buffer "$switch $_loctmp"
  62 }
  63
  64
  65 # Provides backward compatibility for old option names in the global section.
  66 translate_option() {
  67         local section="$1"
  68         local old_option="$2"
  69         local new_option="$3"
  70         local _value
  71         config_get _value "$section" "$old_option"
  72         [ -z "$_value" ] && return
  73         cfg_append "${new_option//_/-} $_value"
  74 }
  75
  76 translate_bool() {
  77         local section="$1"
  78         local old_option="$2"
  79         local new_option="$3"
  80         local _bool
  81         local _value
  82         config_get_bool _bool "$section" "$old_option" 0
  83         [ "$_bool" -eq 0 ] && return
  84         cfg_append "${new_option//_/-} true"
  85 }
  86
  87 # Adds a new interface section for setting default interface options.
  88 add_default_option() {
  89         local option="$1"
  90         local value="$2"
  91         cfg_append "default ${option//_/-} $value"
  92 }
  93
  94 # Global 'hello_interval' and 'wired_hello_interval' options are ignored,
  95 # because they have no direct equivalent: you should use
  96 # interface-specific settings.
  97 parse_old_global_options() {
  98         local section="$1"
  99         translate_bool   "$section" 'carrier_sense'     'link_detect'
 100         translate_bool   "$section" 'random_router_id'  'random_id'
 101         translate_option "$section" 'multicast_address' 'protocol_group'
 102         translate_option "$section" 'port'              'protocol_port'
 103         translate_option "$section" 'local_server'      'local_port'
 104         translate_option "$section" 'smoothing_half_time'       'smoothing_half_life'
 105         translate_option "$section" 'duplication_priority'      'allow_duplicates'
 106         # These two global options are turned into default interface options.
 107         local _bool
 108         config_get_bool _bool "$section" 'assume_wireless' 0
 109         [ "$_bool" -eq 1 ] && add_default_option "wired" "false"
 110         config_get_bool _bool "$section" 'no_split_horizon' 0
 111         [ "$_bool" -eq 1 ] && add_default_option "split_horizon" "false"
 112 }
 113
 114 babel_filter() {
 115         local cfg="$1"
 116         local _loctmp
 117
 118         local _ignored
 119         config_get_bool _ignored "$cfg" 'ignore' 0
 120         [ "$_ignored" -eq 1 ] && return 0
 121
 122         unset buffer
 123         append_parm "$cfg" 'type' ''
 124
 125         append_bool "$cfg" 'local' 'local'
 126
 127         append_parm "$cfg" 'ip' 'ip'
 128         append_parm "$cfg" 'eq' 'eq'
 129         append_parm "$cfg" 'le' 'le'
 130         append_parm "$cfg" 'ge' 'ge'
 131         append_parm "$cfg" 'src_ip' 'src-ip'
 132         append_parm "$cfg" 'src_eq' 'src-eq'
 133         append_parm "$cfg" 'src_le' 'src-le'
 134         append_parm "$cfg" 'src_ge' 'src-ge'
 135         append_parm "$cfg" 'neigh' 'neigh'
 136         append_parm "$cfg" 'id' 'id'
 137         append_parm "$cfg" 'proto' 'proto'
 138
 139         append_ifname "$cfg" 'if' 'if'
 140
 141         append_parm "$cfg" 'action' ''
 142
 143         cfg_append "$buffer"
 144 }
 145
 146 # Only one of babeld's options is allowed multiple times, "import-table".
 147 # We just append it multiple times.
 148 list_cb() {
 149         option_cb "$@"
 150 }
 151
 152 babel_config_cb() {
 153         local type="$1"
 154         local section="$2"
 155         case "$type" in
 156         "general")
 157                 option_cb() {
 158                         local option="$1"
 159                         local value="$2"
 160                         # Ignore old options
 161                         list_contains ignored_options "$option" && return
 162                         cfg_append "${option//_/-} $value"
 163                 }
 164         ;;
 165         "interface")
 166                 local _ifname
 167                 config_get _ifname "$section" 'ifname'
 168                 # Backward compatibility: try to use the section name
 169                 # if no "option ifname" was used.
 170                 [ -z "$_ifname" -a "${section:0:3}" != "cfg" ] && _ifname="$section"
 171                 # Try to resolve the logical interface name
 172                 unset interface
 173                 network_get_device interface "$_ifname" || interface="$_ifname"
 174                 option_cb() {
 175                         local option="$1"
 176                         local value="$2"
 177                         local _interface
 178                         # "option ifname" is a special option, don't actually
 179                         # generate configuration for it.
 180                         [ "$option" = "ifname" ] && return
 181                         [ -n "$interface" ] && _interface="interface $interface" || _interface="default"
 182                         cfg_append "$_interface ${option//_/-} $value"
 183                 }
 184                 # Handle ignore options.
 185                 local _ignored
 186                 # This works because we loaded the whole configuration
 187                 # beforehand (see config_load below).
 188                 config_get_bool _ignored "$section" 'ignore' 0
 189                 if [ "$_ignored" -eq 1 ]
 190                 then
 191                         option_cb() { return; }
 192                 else
 193                         # Also include an empty "interface $interface" statement,
 194                         # so that babeld operates on this interface.
 195                         [ -n "$interface" ] && cfg_append "interface $interface"
 196                 fi
 197         ;;
 198         *)
 199                 # Don't use reset_cb, this would also reset config_cb
 200                 option_cb() { return; }
 201         ;;
 202         esac
 203 }
 204
 205 start() {
 206         mkdir -p /var/lib
 207         mkdir -p /var/etc
 208         mkdir -p $OTHERCONFIGDIR
 209
 210         # Start by emptying the generated config file
 211         >"$CONFIGFILE"
 212         # Import dynamic config files
 213         for f in $OTHERCONFIGDIR/*.conf; do
 214                 [ -f "$f" ] && cat $f >> $CONFIGFILE
 215         done
 216         # First load the whole config file, without callbacks, so that we are
 217         # aware of all "ignore" options in the second pass.
 218         config_load babeld
 219         # Parse general and interface sections thanks to the "config_cb()"
 220         # callback.  This allows to loop over all options without having to
 221         # know their name in advance.
 222         config_cb() { babel_config_cb "$@"; }
 223         config_load babeld
 224         # Backward compatibility
 225         config_foreach parse_old_global_options general
 226         # Parse filters separately, since we know which options we expect
 227         config_foreach babel_filter filter
 228         # Using multiple config files is supported since babeld 1.5.1
 229         /usr/sbin/babeld -D -I "$pidfile" -c "$OTHERCONFIGFILE" -c "$CONFIGFILE"
 230         # Wait for the pidfile to appear
 231         for i in 1 2
 232         do
 233                 [ -f "$pidfile" ] || sleep 1
 234         done
 235         [ -f "$pidfile" ] || (echo "Failed to start babeld"; exit 42)
 236 }
 237
 238 stop() {
 239         [ -f "$pidfile" ] && kill $(cat $pidfile)
 240   # avoid race-condition on restart: wait for
 241   # babeld to die for real.
 242   [ -f "$pidfile" ] && sleep 1
 243   [ -f "$pidfile" ] && sleep 1
 244   [ -f "$pidfile" ] && sleep 1
 245   [ -f "$pidfile" ] && exit 42
 246 }
 247
 248 status() {
 249         [ -f "$pidfile" ] && kill -USR1 $(cat $pidfile)
 250 }