A network packet capture compiler for rapidly modeling and generating network traffic in hexdump or libpcap format.
Flowsynth is a network packet capture compiler that translates high-level flow descriptions into actual packet captures. It allows users to model network traffic using a custom syntax language, automating protocol details like TCP handshakes and generating output in hexdump or libpcap formats. This tool solves the problem of manually crafting packet captures for testing, simulation, or analysis purposes.
Network engineers, security researchers, and developers who need to generate or simulate network traffic for testing, analysis, or educational scenarios.
Developers choose Flowsynth for its ability to rapidly model complex network interactions with a simple syntax, automating tedious protocol calculations and supporting multiple output formats. Its unique selling point is the compilation approach, turning abstract flow descriptions into ready-to-use packet captures.
a network packet capture compiler
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Allows rapid modeling of network flows with a simple, readable syntax, as shown in the HTTP example where a full interaction is defined in just a few lines.
Handles TCP three-way handshakes, sequence/acknowledgment calculations, and flag generation automatically, reducing manual packet crafting effort.
Generates output in both hexdump and libpcap (.pcap) formats, enabling easy integration with tools like Wireshark for analysis.
Supports domain name resolution and IPv6 addresses in flow declarations, though DNS queries are not captured in the output.
Still tested on Python 2.7, which is end-of-life, posing security risks and compatibility issues in modern Python environments.
The use of global variables prevents safe concurrent use of multiple Model objects, as explicitly warned in the README, limiting scalability.
Focuses primarily on TCP and UDP; lacks built-in support for other common protocols like ICMP, requiring workarounds for broader simulations.
The syntax is described as 'less-than-ideal' and subject to change, which could lead to breaking changes in future releases.