IP (Internet protocol) fragment processing method based on two-level table storage and transport layer information inquiry

• Main Authors: LV GAOFENG, CHEN SHUHUI, MAO XILONG, SUN ZHIGANG, CHEN YIJIAO, CUI XIANGDONG, ZHAO GUOHONG, SU JINSHU, TANG YONG, LU HUABIAO, LI TAO
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2012
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses an IP (Internet protocol) fragment processing method based on two-level table storage and transport layer information inquiry, which aims to provide an IP fragment processing scheme with small storage overhead and easy implementation for network equipment and to reduce the cost and complexity of the network equipment. The technical scheme is that the method comprises the following steps of: firstly, designing an IP fragment message processing logic consisting of a fragment message analysis module, a network layer/transport layer fragment data buffer area, a control module, a hash module, an address generation module, a two-level table and an overtime maintenance module, wherein the two-level table comprises an initial fragment information table and a conflict fragment information table; and then, processing the IP fragments which are divided into a first fragment message, other fragment (intermediate fragment or tail fragment) messages and non-fragment messagesby the IP fragment messag