Packet fragment handling

Abstract

A packet header processing engine includes a packet processing unit that is configured to generate the packet header information based on the packet header data. A checksum generating unit is connected to the packet processing unit. The checksum generating unit is configured to compute and store a partial checksum for a packet header being processed by the packet processing unit. After all packet header information for a packet is stored in the buffer, the checksum generating unit contains a complete checksum for the packet header.

1 . A packet header processing engine comprising:
 a packet processing unit configured to construct packet header information according to a packet header protocol;   a checksum accumulator configured to store a partial checksum for a packet header being processed by the packet processing unit; and   a checksum generator connected to the packet processing unit and the checksum accumulator, the checksum generator being configured to compute a new partial checksum from the packet header information and the stored partial checksum.   
     
     
         2 - 25 . (canceled)