#!/bin/bash
set -Eeuo pipefail

EMPTYBR=$(for br in /sys/devices/virtual/net/br*; do if [ ! -d $br ]; then continue; fi; ls $br/brif/ | grep -qv "vxlan\|vlan" || echo ${br##*/}; done)

for BRIDGE in $EMPTYBR
  do
    echo "removing unused customer bridge/vxlan: $BRIDGE"
    for uplinkif in /sys/devices/virtual/net/$BRIDGE/brif/*; do
      ip link del dev ${uplinkif##*/}
    done
    ip link set down $BRIDGE
    brctl delbr $BRIDGE
done



for route in $(vtysh -c "show ip route kernel" | grep 'unknown inactive' | sed 's|.* \([0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\/[0-9]\{1,3\}\) \[.\/\([0-9]\{1,3\}\)\].*|\1-met-\2|')
  do
    echo "removing zombie route: ${route/-met-/ metric }"
    ip route add ${route/-met-/ via 127.1.1.1 metric }
    ip route del ${route/-met-/ metric }
done


#all this spiel is not needed for ipv6
#for route in $(vtysh -c "show ipv6 route kernel" | grep 'unknown inactive' | awk '{ print $3 }')
#  do
#    echo "removing zombie route: $route"
#    ip route add blackhole $route
#    ip route del $route
#done