lixonet-ee/tinc/subnet-up.tmpl

#!/bin/ash
echo "Route up: \$SUBNET weight \$WEIGHT via \$NODE (\$REMOTEADDRESS:\$REMOTEPORT)"
nonMACChars=`echo \$SUBNET | tr -d "[:digit:]" | tr -d [:ABCDEFabcdef]`
macFile="/tmp/tinc_peer_mac_\$NODE"
if [ -z "\$nonMACChars" ]; then
  # This subnet is a MAC
  echo "\$SUBNET" > \$macFile
else
  if echo "\$SUBNET" | grep -q -E ".+/32\$"; then
    # This subnet is likely an IP address, add it to the ARP table
    if test -f "\$macFile"; then
      mac=`cat \$macFile`
      address=`echo "\$SUBNET" | cut -d '/' -f 1`
      echo "Mapping \$address <=> \$mac in ARP table"
      arp -s "\$address" "\$mac"
    else
      echo "[WARNING] No MAC known for node \$NODE, can't route \$SUBNET. This is only a problem if this is a remote route."
    fi
  fi
fi