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packetC Programming by Dwight Mulcahy, Ralph Duncan, Peder Jungck

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R E P R I N T  3

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Dynamically Accessing Packet Header Fields at High-speedby Ralph Duncan, Peder Jungck and Kenneth Ross

Abstract

A significant part of packet processing consists of detecting whether certain standard protocol headers are present, where they are located and whether they include optional information. Packet processing programs are on tight time budgets, especially to handle speeds in the gigabits per second (gbps) range. Thus, high-speed mechanisms for finding and accessing headers are critical. Our approach lets users define headers as C-style structures in a high-level language, packetC [1], and specify header locations in terms ...

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