Patent ID: 7817572

Claim:
A communications apparatus for directly transferring payload data included in a received packet to an application memory area, said apparatus comprising: an error check unit for checking the payload data for an error; a write processing unit for performing a write processing to write the payload data into the application memory area; and a protocol processing unit for causing said write processing unit to start said write processing for writing the payload data into the application memory area without waiting for a completion of the error check to an extent that a valid section in the application memory area is not overwritten by the payload data, wherein: said protocol processing unit checks whether or not the payload data intended for said write processing overlaps with a valid section in the application memory area, and causes said write processing unit to write a portion of the payload data which does not overlap with the valid section into the application memory area without waiting for the completion of the error check when at least a part of the payload data does not overlap with the valid section, and said protocol processing unit causes said write processing unit to write a data portion of the payload data which overlaps with a valid section into the application memory area if no error is found after the completion of the error check.