US Patent 7817572 Communications apparatus and communication method

A communications apparatus for directly transferring payload data included in a received packet to an application memory area. The communications apparatus comprises an error check unit for checking the payload data for an error, a write processing unit for performing write processing for writing the payload data into the application memory area, and a protocol processing unit for causing the write processing unit to start write processing to write the payload data into the application memory without waiting for the completion of the error check, and upon detection of an error, returning a valid section in the application area that has been overwritten by write processing to an invalid section which has not stored normal data.