#!/bin/sh

running() {
  [ -n "$(pgrep -f $1)" ]
}

write_configs() {
  AREA=1
  IPADDR=$(ip addr show lan0 | grep "^    inet " | sed -e 's/^    inet // ; s/ .*$//')

  cat > /tmp/zebra.conf <<EOF
EOF
  chown quagga:quagga /tmp/zebra.conf
  chmod 600 /tmp/zebra.conf

  cat > /tmp/ospfd.conf <<EOF
router ospf
  network ${IPADDR} area ${AREA}
  redistribute connected
  passive-interface lo
!
log stdout
EOF
  chown quagga:quagga /tmp/ospfd.conf
  chmod 600 /tmp/ospfd.conf
}

start() {
  if running zebra || running ospfd ; then
    exit 0
  fi

  CFGFILE=/config/spacecast/SpacecastAnycast.json
  # Exit if anycast is not enabled.
  if [ ! -f $CFGFILE ] || grep -qv ENABLE_ANYCAST $CFGFILE ; then
    exit 0
  fi

  write_configs
  babysit 60 zebra -f /tmp/zebra.conf 2>&1 | logos "zebra" &
  babysit 60 ospfd -f /tmp/ospfd.conf 2>&1 | logos "ospfd" &
}

stop() {
  pkillwait -x zebra
  pkillwait -x ospfd
  rm -f /tmp/ospfd.conf
  rm -f /tmp/zebra.conf
}

case "$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  restart)
    stop
    start
    ;;
  sleep)
    sleep 60
    ;;
  *)
    echo "Usage: $0 {start|stop|restart}"
    exit 1
    ;;
esac

exit 0