240 lines
6.6 KiB
Bash
Executable File
240 lines
6.6 KiB
Bash
Executable File
#!/bin/sh /etc/rc.common
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. /lib/functions/network.sh
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START=70
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pidfile='/var/run/babeld.pid'
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CONFIGFILE='/var/etc/babeld.conf'
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OTHERCONFIGFILE="/etc/babeld.conf"
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EXTRA_COMMANDS="status"
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EXTRA_HELP=" status Dump Babel's table to the log file."
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# Options to ignore for the global section (old options that are translated
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# for backward compatibility with old configuration files)
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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"
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# Append a line to the configuration file
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cfg_append() {
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local value="$1"
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echo "$value" >> $CONFIGFILE
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}
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cfg_append_option() {
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local section="$1"
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local option="$2"
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local value
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config_get value "$section" "$option"
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# babeld convention for options is '-', not '_'
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[ -n "$value" ] && cfg_append "${option//_/-} $value"
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}
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# Append to the "$buffer" variable
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append_ifname() {
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local section="$1"
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local option="$2"
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local switch="$3"
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local _name
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config_get _name "$section" "$option"
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[ -z "$_name" ] && return 0
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local ifname=$(uci_get_state network "$_name" ifname "$_name")
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append buffer "$switch $ifname"
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}
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append_bool() {
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local section="$1"
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local option="$2"
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local value="$3"
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local _loctmp
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config_get_bool _loctmp "$section" "$option" 0
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[ "$_loctmp" -gt 0 ] && append buffer "$value"
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}
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append_parm() {
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local section="$1"
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local option="$2"
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local switch="$3"
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local _loctmp
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config_get _loctmp "$section" "$option"
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[ -z "$_loctmp" ] && return 0
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append buffer "$switch $_loctmp"
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}
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# Provides backward compatibility for old option names in the global section.
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translate_option() {
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local section="$1"
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local old_option="$2"
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local new_option="$3"
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local _value
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config_get _value "$section" "$old_option"
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[ -z "$_value" ] && return
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cfg_append "${new_option//_/-} $_value"
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}
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translate_bool() {
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local section="$1"
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local old_option="$2"
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local new_option="$3"
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local _bool
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local _value
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config_get_bool _bool "$section" "$old_option" 0
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[ "$_bool" -eq 0 ] && return
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cfg_append "${new_option//_/-} true"
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}
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# Adds a new interface section for setting default interface options.
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add_default_option() {
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local option="$1"
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local value="$2"
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cfg_append "default ${option//_/-} $value"
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}
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# Global 'hello_interval' and 'wired_hello_interval' options are ignored,
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# because they have no direct equivalent: you should use
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# interface-specific settings.
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parse_old_global_options() {
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local section="$1"
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translate_bool "$section" 'carrier_sense' 'link_detect'
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translate_bool "$section" 'random_router_id' 'random_id'
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translate_option "$section" 'multicast_address' 'protocol_group'
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translate_option "$section" 'port' 'protocol_port'
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translate_option "$section" 'local_server' 'local_port'
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translate_option "$section" 'smoothing_half_time' 'smoothing_half_life'
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translate_option "$section" 'duplication_priority' 'allow_duplicates'
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# These two global options are turned into default interface options.
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local _bool
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config_get_bool _bool "$section" 'assume_wireless' 0
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[ "$_bool" -eq 1 ] && add_default_option "wired" "false"
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config_get_bool _bool "$section" 'no_split_horizon' 0
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[ "$_bool" -eq 1 ] && add_default_option "split_horizon" "false"
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}
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babel_filter() {
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local cfg="$1"
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local _loctmp
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local _ignored
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config_get_bool _ignored "$cfg" 'ignore' 0
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[ "$_ignored" -eq 1 ] && return 0
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unset buffer
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append_parm "$cfg" 'type' ''
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append_bool "$cfg" 'local' 'local'
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append_parm "$cfg" 'ip' 'ip'
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append_parm "$cfg" 'eq' 'eq'
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append_parm "$cfg" 'le' 'le'
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append_parm "$cfg" 'ge' 'ge'
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append_parm "$cfg" 'neigh' 'neigh'
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append_parm "$cfg" 'id' 'id'
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append_parm "$cfg" 'proto' 'proto'
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append_ifname "$cfg" 'if' 'if'
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append_parm "$cfg" 'action' ''
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cfg_append "$buffer"
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}
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# Only one of babeld's options is allowed multiple times, "import-table".
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# We just append it multiple times.
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list_cb() {
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option_cb "$@"
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}
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babel_config_cb() {
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local type="$1"
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local section="$2"
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case "$type" in
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"general")
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option_cb() {
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local option="$1"
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local value="$2"
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# Ignore old options
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list_contains ignored_options "$option" && return
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cfg_append "${option//_/-} $value"
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}
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;;
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"interface")
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local _ifname
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config_get _ifname "$section" 'ifname'
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# Backward compatibility: try to use the section name
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# if no "option ifname" was used.
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[ -z "$_ifname" -a "${section:0:3}" != "cfg" ] && _ifname="$section"
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# Try to resolve the logical interface name
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unset interface
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network_get_device interface "$_ifname" || interface="$_ifname"
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option_cb() {
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local option="$1"
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local value="$2"
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local _interface
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# "option ifname" is a special option, don't actually
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# generate configuration for it.
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[ "$option" = "ifname" ] && return
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[ -n "$interface" ] && _interface="interface $interface" || _interface="default"
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cfg_append "$_interface ${option//_/-} $value"
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}
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# Handle ignore options.
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local _ignored
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# This works because we loaded the whole configuration
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# beforehand (see config_load below).
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config_get_bool _ignored "$section" 'ignore' 0
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if [ "$_ignored" -eq 1 ]
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then
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option_cb() { return; }
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else
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# Also include an empty "interface $interface" statement,
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# so that babeld operates on this interface.
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[ -n "$interface" ] && cfg_append "interface $interface"
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fi
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;;
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*)
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# Don't use reset_cb, this would also reset config_cb
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option_cb() { return; }
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;;
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esac
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}
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start() {
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mkdir -p /var/lib
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mkdir -p /var/etc
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# Start by emptying the generated config file
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>"$CONFIGFILE"
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# First load the whole config file, without callbacks, so that we are
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# aware of all "ignore" options in the second pass.
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config_load babeld
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# Parse general and interface sections thanks to the "config_cb()"
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# callback. This allows to loop over all options without having to
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# know their name in advance.
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config_cb() { babel_config_cb "$@"; }
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config_load babeld
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# Backward compatibility
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config_foreach parse_old_global_options general
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# Parse filters separately, since we know which options we expect
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config_foreach babel_filter filter
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# Using multiple config files is supported since babeld 1.5.1
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/usr/sbin/babeld -D -I "$pidfile" -c "$OTHERCONFIGFILE" -c "$CONFIGFILE"
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# Wait for the pidfile to appear
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for i in 1 2
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do
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[ -f "$pidfile" ] || sleep 1
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done
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[ -f "$pidfile" ] || (echo "Failed to start babeld"; exit 42)
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}
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stop() {
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[ -f "$pidfile" ] && kill $(cat $pidfile)
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# avoid race-condition on restart: wait for
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# babeld to die for real.
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[ -f "$pidfile" ] && sleep 1
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[ -f "$pidfile" ] && sleep 1
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[ -f "$pidfile" ] && sleep 1
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[ -f "$pidfile" ] && exit 42
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}
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status() {
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[ -f "$pidfile" ] && kill -USR1 $(cat $pidfile)
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}
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