Nettle: Functional Reactive Programming for OpenFlow Networks
Andreas Voellmy, Ashish K. Agarwal, Paul Hudak · 2010
We describe a language-centric approach to solving the complex, low-level, and error-prone nature of network control. Specifically, we have designed a domain-specific language called Nettle, embeddedinHaskell, thatallowsprogrammingOpenFlow networksinanelegant, declarative style. Nettle is designed in layers to accommodate a family of DSLs targeted for specific network applications. The primary core of Nettle is based on the principles of functional reactive programming (FRP). Aside from its useful signal abstraction, FRP facilitates the integration of components written in different higher-level DSLs. We demonstrate our methodology by writing several non-trivial OpenFlow controllers. 1 1