{
{    The purpose of this procedure is to deliver the Xerox Internet data events
{ to the network layer external interface.  The data events are queued on the
{ sap descriptor for the specified sap at the external interface to the network
{ layer.
{
{       NAP$DELIVER_INTERNET_EVENT (SAP, USER_SAP_ID, SOURCE_ADDRESS,
{             USER_PROTOCOL, MULTICAST, MESSAGE_HEADER, MESSAGE_HEADER_LENGTH,
{             DATAGRAM)
{
{ SAP: (input)  This parameter specifies the network sap identifier over
{       which the event was received.
{
{ USER_SAP_ID: (input) This is a dummy parameter for this interface.
{
{ SOURCE_ADDRESS: (input)  This parameter specifies the XNS internet address
{       from which the data was sent.
{
{ USER_PROTOCOL: (output) This parameter specifies the user protocol value
{       associated with the datagram.  The user protocol value may be used to
{       distinguish between different types of datagrams sent to the same
{       destination from a single source.
{
{ MULTICAST: (output) This parameter specifies whether or not the datagram was
{       delivered to the local system via a multicast on the underlying
{       network.
{
{ MESSAGE_HEADER: (input, output) This is a dummy parameter for this interface.
{       However, a NIL value is returned in this parameter.
{
{ MESSAGE_HEADER_LENGTH: (input, output): This is a dummy parameter for this interface.
{       However, a value of 0 is returned in this parameter.
{
{ DATAGRAM: (input)  This parameter specifies the data associated with the event.
{
