DATA TRANSFER ERROR CHECKING

摘要

A network interface controller implementation that performs direct data placement to memory where all segments of a particular connection are aligne d, i.e. cuts-through without accessing reassembly buffers (i.e., a "Fast" connection type), or if all segments are non~aligned moves data through reassembly buffers (i.e., a "Slow" connection type). The type of connection can change from Fast to Slow and back. The implementation preferably conduct s CRC validation for a majority of inbound DDP segments in the Fast connection before sending a TCP acknowledgement confirming segment reception. The metho d of computing a CRC value according to the present invention assumes that eac h TCP segment starts with an aligned DDP segment and that the first two bytes of a TCP payload is an MPA length field of an MPA frame.