usbsnoop

usbsnoop is a real-time USB traffic sniffer that provides a colorized, compact feed of USB transactions system-wide, utilizing fentry hooks for universal compatibility across various host-controller drivers. Its primary use cases include reverse-engineering USB peripherals, debugging drivers, inspecting mass-storage commands, and capturing errors, with features such as decoded SETUP packets, latency measurements, and JSON output for offline analysis. The tool operates without the need for hardware sniffers or traditional monitoring setups, allowing instantaneous observation and analysis of USB device communications.