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A TCP Test System Specifying Only Exceptional Packet Sequences

2002; Springer Science+Business Media; Linguagem: Inglês

10.1007/978-0-387-35497-2_2

1868-422X

Tomohiko Ogishi, Tōru Hasegawa, Toshihiko Kato, Kenji Suzuki,

Software-Defined Networks and 5G

Although TCP is widely used in Internet, new specifications are still proposed and implemented. In the circumstance above, it is highly possible that some errors are detected on the communication between new and old implementations. Several test tools were developed so far. However, they do not have enough function to customize test sequence or need significant effort to specify the sequence. We developed a TCP test system which specifies only exceptional packet sequence in the test scenario. The system performs exceptional packet sequence only when the condition specified in the test scenario is satisfied. Otherwise, it performs ordinary TCP behavior. The system is implemented by modifying TCP module of NetBSD with SACK code developed by Pittsburgh Supercomputing Center. We also evaluated SACK implementation as an example of recent specification using the test system.