METHOD FOR PARSING PACKET HEADER, HEADER PARSING PRE-PROCESSING DEVICE AND NETWORK PROCESSOR

摘要

The present invention provides a method for parsing a packet header, a header parsing pre-processing device and a network processor. The method comprises: when the number of header types of a packet exceeds nine, analyzing a header of the packet, and re-defining a repetitive header type as a new header type; and adding a new parsing rule according to the new header type, and parsing a header type of the packet according to the new parsing rule. Through the present invention, a repetitive header type is re-defined as a new header type, a new parsing rule is added according to the new header type, and a header type of the packet is parsed according to the new parsing rule, so that in an original system, without increasing the hardware cost, an effective header type can still be parsed as required, and is provided to be used by a microcode.