babeld/files/babeld.init

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