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arXiv · 2604.21795

NEST: Network Enforced Session Types (Technical Report)

Jens Kanstrup Larsen·Alceste Scalas·Guy Amir·Jules Jacobs·Jana Wagemaker·Nate Foster
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Abstract

This paper introduces NEST (Network-Enforced Session Types), a runtime verification framework that moves application-level protocol monitoring into the network fabric. Unlike prior work that instruments or wraps application code, we synthesize packet-level monitors that enforce protocols directly in the data plane. We develop algorithms to generate network-level monitors from session types and extend them to handle packet loss and reordering. We implement NEST in P4 and evaluate it on applications including microservice and network-function models, showing that network-level monitors can enforce realistic non-trivial protocols.

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Jens Kanstrup Larsen, Alceste Scalas, Guy Amir, Jules Jacobs, Jana Wagemaker, Nate Foster. 2026-04-23. NEST: Network Enforced Session Types (Technical Report). https://doi.org/10.4230/lipics.ecoop.2026.31

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