Network programming is widely understood as programming strictly defined socket interfaces. Only some frameworks have made a step towards real network programming by decomposing networking functionality into small modullar blocks that can be assembled in a ?exible manner. In this paper, we tackle the challenge of accommodating 3 partially con?icting objectives: (i) high ?exibility for network programmers, (ii) re-configuration of the network stack at runtime, and (iii) high packet forwarding rates. First experiences with a prototype implementation in Linux suggest little performance overhead compared to the standard Linux protocol stack.
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