BOOLEAN
EthShouldAddressLoopBack(
  IN  PETH_FILTER Filter,
  IN  CHAR Address[ETH_LENGTH_OF_ADDRESS
  );

Routine Description:

	Do a quick check to see whether the input address should
	loopback.

	NOTE: THIS ROUTINE ASSUMES THAT THE LOCK IS HELD.

	NOTE: THIS ROUTINE DOES NOT CHECK THE SPECIAL CASE OF SOURCE
	EQUALS DESTINATION.

Arguments:

	Filter - Pointer to the filter database.

	Address - A network address to check for loopback.


Return Value:

	Returns TRUE if the address is *likely* to need loopback.  It
	will return FALSE if there is *no* chance that the address would
	require loopback.