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We present Flowsim, a new web-based OpenFlow data plane simulator. Flowsim enables users to configure their own OpenFlow switches, issue OpenFlow messages, inject custom packet sequences into the data plane, and observe the resulting behavior. During a simulation, the life cycle of an injected packet is analyzed as it traverses the OpenFlow data plane. The user is presented with visualizations that...
Incorrect implementations of network protocol message specifications affect the stability, security, and cost of network system development. Most implementation defects fall into one of three categories of well defined message constraints. However, the general process of constructing network protocol stacks and systems does not capture these categorical constraints. We introduce a systems programming...
Modern cellular networks are expected to support both voice and a growing volume of data traffic. The rapid growth in data traffic has promoted network operators to move to Long Term Evolution (LTE), a 4th generation of wireless network infrastructure. However, LTE architecture does not support native circuit switching services and relies on the IP Multimedia Subsystem (IMS) for supporting voice and...
Firewalls are ubiquitous security functions and exist in almost all network connected devices whether protecting host stacks or providing transient packet filtering. Firewall performance, which is a key ingredient for network performance, can be greatly degraded by traffic crafted to exploit its filtering algorithms. These attacks can greatly reduce the Quality of Service (QoS) received by existing...
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