Unity - Scripting API:

public static function GetBroadcastConnectionMessage(hostId: int, buffer: byte[], bufferSize: int, out receivedSize: int, out error: byte): void;

Parameters

hostId	Id of broadcast receiver (returns with Receve() function).
buffer	Message buffer provided by caller.
bufferSize	Buffer size.
receivedSize	Received size (if received size > bufferSize, corresponding error will be set).
error	Possible error.

If Receive() function returns BroadcastEvent, immedeately this function will return complimentary message of broadcast sender.