3.2.5.1 DATA Trigger
The client MUST validate that the payload provided by the DATA Trigger specifies the DATA packet as per section 2.2.4. The client MUST check the value of the bit at the index specified by the BlockNumber field of the DATA packet in MissingBlocksBitmap (section 3.2.1). If the value is set to one, then the client MUST ignore the DATA packet and stop further processing.
If the bit value is not set to one, the client MUST set the bit to one and MUST send the Cache Done Trigger to the WDS Multicast Transport Protocol [MS-WDSMT] specifying the size of the DATA packet.
The client MUST check whether all bits of MissingBlocksBitmap (section 3.2.1) are now set to one. If so then the download of Content has completed and the client MUST terminate.