babeld/files/babeld.init

   1 #!/bin/sh /etc/rc.common
   2
   3 . $IPKG_INSTROOT/lib/functions/network.sh
   4
   5 USE_PROCD=1
   6 START=70
   7
   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 conf_dir"
  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         # Configure alternative configuration file and directory
 113         local conf_file
 114         config_get conf_file "$section" "conf_file"
 115         [ -n "$conf_file" ] && OTHERCONFIGFILE="$conf_file"
 116         local conf_dir
 117         config_get conf_dir "$section" "conf_dir"
 118         [ -n "$conf_dir" ] && OTHERCONFIGDIR="$conf_dir"
 119 }
 120
 121 babel_filter() {
 122         local cfg="$1"
 123         local _loctmp
 124
 125         local _ignored
 126         config_get_bool _ignored "$cfg" 'ignore' 0
 127         [ "$_ignored" -eq 1 ] && return 0
 128
 129         unset buffer
 130         append_parm "$cfg" 'type' ''
 131
 132         append_bool "$cfg" 'local' 'local'
 133
 134         append_parm "$cfg" 'ip' 'ip'
 135         append_parm "$cfg" 'eq' 'eq'
 136         append_parm "$cfg" 'le' 'le'
 137         append_parm "$cfg" 'ge' 'ge'
 138         append_parm "$cfg" 'src_ip' 'src-ip'
 139         append_parm "$cfg" 'src_eq' 'src-eq'
 140         append_parm "$cfg" 'src_le' 'src-le'
 141         append_parm "$cfg" 'src_ge' 'src-ge'
 142         append_parm "$cfg" 'neigh' 'neigh'
 143         append_parm "$cfg" 'id' 'id'
 144         append_parm "$cfg" 'proto' 'proto'
 145
 146         append_ifname "$cfg" 'if' 'if'
 147
 148         append_parm "$cfg" 'action' ''
 149
 150         cfg_append "$buffer"
 151 }
 152
 153 # Only one of babeld's options is allowed multiple times, "import-table".
 154 # We just append it multiple times.
 155 list_cb() {
 156         option_cb "$@"
 157 }
 158
 159 babel_config_cb() {
 160         local type="$1"
 161         local section="$2"
 162         case "$type" in
 163         "general")
 164                 option_cb() {
 165                         local option="$1"
 166                         local value="$2"
 167                         # Ignore old options
 168                         list_contains ignored_options "$option" && return
 169                         # Skip lists. They will be taken care of by list_cb
 170                         test "${option#*_ITEM}" != "$option" && return
 171                         test "${option#*_LENGTH}" != "$option" && return
 172                         cfg_append "${option//_/-} $value"
 173                 }
 174         ;;
 175         "interface")
 176                 local _ifname
 177                 config_get _ifname "$section" 'ifname'
 178                 # Backward compatibility: try to use the section name
 179                 # if no "option ifname" was used.
 180                 [ -z "$_ifname" -a "${section:0:3}" != "cfg" ] && _ifname="$section"
 181                 # Try to resolve the logical interface name
 182                 unset interface
 183                 network_get_device interface "$_ifname" || interface="$_ifname"
 184                 option_cb() {
 185                         local option="$1"
 186                         local value="$2"
 187                         local _interface
 188                         # "option ifname" is a special option, don't actually
 189                         # generate configuration for it.
 190                         [ "$option" = "ifname" ] && return
 191                         [ -n "$interface" ] && _interface="interface $interface" || _interface="default"
 192                         cfg_append "$_interface ${option//_/-} $value"
 193                 }
 194                 # Handle ignore options.
 195                 local _ignored
 196                 # This works because we loaded the whole configuration
 197                 # beforehand (see config_load below).
 198                 config_get_bool _ignored "$section" 'ignore' 0
 199                 if [ "$_ignored" -eq 1 ]
 200                 then
 201                         option_cb() { return; }
 202                 else
 203                         # Also include an empty "interface $interface" statement,
 204                         # so that babeld operates on this interface.
 205                         [ -n "$interface" ] && cfg_append "interface $interface"
 206                 fi
 207         ;;
 208         *)
 209                 # Don't use reset_cb, this would also reset config_cb
 210                 option_cb() { return; }
 211         ;;
 212         esac
 213 }
 214
 215 start_service() {
 216         mkdir -p /var/lib
 217         mkdir -p /var/etc
 218         mkdir -p "$OTHERCONFIGDIR"
 219
 220         # Start by emptying the generated config file
 221         >"$CONFIGFILE"
 222         # Import dynamic config files
 223         for f in "$OTHERCONFIGDIR"/*.conf; do
 224                 [ -f "$f" ] && cat "$f" >> "$CONFIGFILE"
 225         done
 226         # First load the whole config file, without callbacks, so that we are
 227         # aware of all "ignore" options in the second pass.
 228         config_load babeld
 229         # Parse general and interface sections thanks to the "config_cb()"
 230         # callback.  This allows to loop over all options without having to
 231         # know their name in advance.
 232         config_cb() { babel_config_cb "$@"; }
 233         config_load babeld
 234         # Backward compatibility
 235         config_foreach parse_old_global_options general
 236         # Parse filters separately, since we know which options we expect
 237         config_foreach babel_filter filter
 238         procd_open_instance
 239         # Using multiple config files is supported since babeld 1.5.1
 240         procd_set_param command /usr/sbin/babeld -I "" -c "$OTHERCONFIGFILE" -c "$CONFIGFILE"
 241         procd_set_param stdout 1
 242         procd_set_param stderr 1
 243         procd_set_param file "$OTHERCONFIGFILE" "$OTHERCONFIGDIR"/*.conf "$CONFIGFILE"
 244         procd_set_param respawn
 245         procd_close_instance
 246 }
 247
 248 service_triggers() {
 249         procd_add_reload_trigger babeld
 250 }
 251
 252 status() {
 253         kill -USR1 $(pgrep -P 1 babeld)
 254 }