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 # Append a line to the configuration file
  14 cfg_append() {
  15         local value="$1"
  16         echo "$value" >> $CONFIGFILE
  17 }
  18
  19 cfg_append_option() {
  20         local section="$1"
  21         local option="$2"
  22         local value
  23         config_get value "$section" "$option"
  24         # babeld convention for options is '-', not '_'
  25         [ -n "$value" ] && cfg_append "${option//_/-} $value"
  26 }
  27
  28 # Append to the "$buffer" variable
  29 append_ifname() {
  30         local section="$1"
  31         local option="$2"
  32         local switch="$3"
  33         local _name
  34         config_get _name "$section" "$option"
  35         [ -z "$_name" ] && return 0
  36         local ifname=$(uci_get_state network "$_name" ifname "$_name")
  37         append buffer "$switch $ifname"
  38 }
  39
  40 append_bool() {
  41         local section="$1"
  42         local option="$2"
  43         local value="$3"
  44         local _loctmp
  45         config_get_bool _loctmp "$section" "$option" 0
  46         [ "$_loctmp" -gt 0 ] && append buffer "$value"
  47 }
  48
  49 append_parm() {
  50         local section="$1"
  51         local option="$2"
  52         local switch="$3"
  53         local _loctmp
  54         config_get _loctmp "$section" "$option"
  55         [ -z "$_loctmp" ] && return 0
  56         append buffer "$switch $_loctmp"
  57 }
  58
  59 babel_filter() {
  60         local cfg="$1"
  61         local _loctmp
  62
  63         local _ignored
  64         config_get_bool _ignored "$cfg" 'ignore' 0
  65         [ "$_ignored" -eq 1 ] && return 0
  66
  67         unset buffer
  68         append_parm "$cfg" 'type' ''
  69
  70         append_bool "$cfg" 'local' 'local'
  71
  72         append_parm "$cfg" 'ip' 'ip'
  73         append_parm "$cfg" 'eq' 'eq'
  74         append_parm "$cfg" 'le' 'le'
  75         append_parm "$cfg" 'ge' 'ge'
  76         append_parm "$cfg" 'neigh' 'neigh'
  77         append_parm "$cfg" 'id' 'id'
  78         append_parm "$cfg" 'proto' 'proto'
  79
  80         append_ifname "$cfg" 'if' 'if'
  81
  82         append_parm "$cfg" 'action' ''
  83
  84         cfg_append "$buffer"
  85 }
  86
  87 # Only one of babeld's options is allowed multiple times, "import-table".
  88 # We just append it multiple times.
  89 list_cb() {
  90         option_cb "$@"
  91 }
  92
  93 babel_config_cb() {
  94         local type="$1"
  95         local section="$2"
  96         case "$type" in
  97         "general")
  98                 option_cb() {
  99                         local option="$1"
 100                         local value="$2"
 101                         cfg_append "${option//_/-} $value"
 102                 }
 103         ;;
 104         "interface")
 105                 unset interface
 106                 network_get_device interface "$section" || interface="$section"
 107                 option_cb() {
 108                         local option="$1"
 109                         local value="$2"
 110                         cfg_append "interface $interface ${option//_/-} $value"
 111                 }
 112                 # Handle ignore options.
 113                 local _ignored
 114                 # This works because we loaded the whole configuration
 115                 # beforehand (see config_load below).
 116                 config_get_bool _ignored "$section" 'ignore' 0
 117                 if [ "$_ignored" -eq 1 ]
 118                 then
 119                         option_cb() { return; }
 120                 else
 121                         # Also include an empty "interface $interface" statement,
 122                         # so that babeld operates on this interface.
 123                         cfg_append "interface $interface"
 124                 fi
 125         ;;
 126         *)
 127                 # Don't use reset_cb, this would also reset config_cb
 128                 option_cb() { return; }
 129         ;;
 130         esac
 131 }
 132
 133 start() {
 134         mkdir -p /var/lib
 135         # Start by emptying the generated config file
 136         >"$CONFIGFILE"
 137         # First load the whole config file, without callbacks, so that we are
 138         # aware of all "ignore" options in the second pass.
 139         config_load babeld
 140         # Parse general and interface sections thanks to the "config_cb()"
 141         # callback.  This allows to loop over all options without having to
 142         # know their name in advance.
 143         config_cb() { babel_config_cb "$@"; }
 144         config_load babeld
 145         # Parse filters separately, since we know which options we expect
 146         config_foreach babel_filter filter
 147         # Using multiple config files is supported since babeld 1.5.1
 148         /usr/sbin/babeld -D -I "$pidfile" -c "$OTHERCONFIGFILE" -c "$CONFIGFILE"
 149         # Wait for the pidfile to appear
 150         for i in 1 2
 151         do
 152                 [ -f "$pidfile" ] || sleep 1
 153         done
 154         [ -f "$pidfile" ] || (echo "Failed to start babeld"; exit 42)
 155 }
 156
 157 stop() {
 158         [ -f "$pidfile" ] && kill $(cat $pidfile)
 159   # avoid race-condition on restart: wait for
 160   # babeld to die for real.
 161   [ -f "$pidfile" ] && sleep 1
 162   [ -f "$pidfile" ] && sleep 1
 163   [ -f "$pidfile" ] && sleep 1
 164   [ -f "$pidfile" ] && exit 42
 165 }
 166
 167 status() {
 168         [ -f "$pidfile" ] && kill -USR1 $(cat $pidfile)
 169 }