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Tool

Packetry

Great Scott Gadgets' USB 2.0 protocol analysis application for live capture with the Cynthion analyzer or for exploring previously captured traffic, working from physical-layer packet data at High, Full and Low Speed. Its GTK 4 interface offers a hierarchical view that expands high-level events into their transactions and packets, plus chronological transaction and packet views, while a device pane summarizes each observed device from its decoded descriptors, including HID report descriptors. Captures are opened and saved as pcap files with the LINKTYPE_USB_2_0 link type, and v0.5.0 added pcapng with custom blocks for non-packet events.

Requirements & limits

  • Release at review: v0.5.0, published 2025-09-30 with a Windows installer and a Linux x86_64 AppImage; the quick-start guide installs it on macOS with Homebrew. The reviewed main commit is 47 commits ahead with interface, dependency and minimum-Rust changes, while Cargo.toml still reports 0.5.0.
  • Live capture needs a Cynthion analyzer whose host software is installed and updated with cynthion update; the code also probes iCE40-usbtrace devices, which the documentation does not cover. Viewing existing capture files needs no hardware.
  • Source builds need Rust 1.93+ according to the README and Cargo.toml (the quick-start guide still says 1.85.1) and GTK 4 headers discoverable through pkg-config. The documentation warns not to build with --all-features, whose optional features are for debugging and testing and degrade normal use.
  • Captures come from the user's own USB devices and buses. The documentation notes that the hierarchical view can show packets out of chronological order. BSD-3-Clause. No capture was made or loaded.

About this entry

Type
Tool
Category
Protocol analysis tools
Relationship
Foundation tool
Targets
Protocol

Sources reviewed

The description was reviewed against primary sources. This does not establish runtime testing, security auditing or verified compatibility.

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Primary sources

  1. README.md GitHub · greatscottgadgets/packetry · Revision 5a7f98b
  2. docs/source/what_is_packetry.rst GitHub · greatscottgadgets/packetry · Revision 5a7f98b
  3. docs/source/quick_start.rst GitHub · greatscottgadgets/packetry · Revision 5a7f98b
  4. docs/source/user_interface.rst GitHub · greatscottgadgets/packetry · Revision 5a7f98b
  5. CHANGELOG.md GitHub · greatscottgadgets/packetry · Revision 5a7f98b
  6. Cargo.toml GitHub · greatscottgadgets/packetry · Revision 5a7f98b
  7. src/backend/mod.rs#L32-L40 GitHub · greatscottgadgets/packetry · Revision 5a7f98b
  8. LICENSE GitHub · greatscottgadgets/packetry · Revision 5a7f98b
  9. https://github.com/greatscottgadgets/packetry/releases/tag/v0.5.0

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