Safe and Efficient Active Network Programming

Active networks are aimed at incorporating programmability into the network to achieve extensibility. One approach to obtaining extensibility is to download router programs into network nodes. This programmability is critical to allow multipoint distributed systems to adapt to network conditions and individual clients’ needs. Although promising, this approach raises critical issues such as safety to achieve reliability despite the complexity of a distributed system, security to protect shared resources, and efficiency to maximize usage of bandwidth. This paper proposes the use of a domain-specific language, PLAN-P, to address all of the above issues. To address safety and security, we give examples of properties of PLAN-P programs that can be automatically checked due to the use of a restricted language. For efficiency, we show that an automatically generated run-time compiler for PLAN-P produces code which outperforms an equivalent compiled Java program. Additionally, we present performance results on a real application (learning bridge) where we obtain 100% of the maximum possible throughput. Copyright 1998 IEEE. Published in the Proceedings of SRDS’98, October 1998. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works, must be obtained from the IEEE. Contact: Manager, Copyrights and Permissions / IEEE Service Center / 445 Hoes Lane / P.O. Box 1331 / Piscataway, NJ 08855-1331, USA. Telephone: + Intl. 908-562-3966.