| # Neutron VPN plugin | 
 | # --------------------------- | 
 |  | 
 | # Save trace setting | 
 | VPN_XTRACE=$(set +o | grep xtrace) | 
 | set +o xtrace | 
 |  | 
 |  | 
 | AGENT_VPN_BINARY="$NEUTRON_BIN_DIR/neutron-vpn-agent" | 
 | VPN_PLUGIN=${VPN_PLUGIN:-"neutron.services.vpn.plugin.VPNDriverPlugin"} | 
 | IPSEC_PACKAGE=${IPSEC_PACKAGE:-"openswan"} | 
 |  | 
 | function neutron_vpn_install_agent_packages { | 
 |     install_package $IPSEC_PACKAGE | 
 | } | 
 |  | 
 | function neutron_vpn_configure_common { | 
 |     _neutron_service_plugin_class_add $VPN_PLUGIN | 
 | } | 
 |  | 
 | function neutron_vpn_stop { | 
 |     local ipsec_data_dir=$DATA_DIR/neutron/ipsec | 
 |     local pids | 
 |     if [ -d $ipsec_data_dir ]; then | 
 |         pids=$(find $ipsec_data_dir -name 'pluto.pid' -exec cat {} \;) | 
 |     fi | 
 |     if [ -n "$pids" ]; then | 
 |         sudo kill $pids | 
 |     fi | 
 | } | 
 |  | 
 | # Restore xtrace | 
 | $VPN_XTRACE |