CANtact is now working with Wireshark! Here's what that looks like:
This is done using SocketCAN on Linux. The slcand daemon is used to provide a bridge between the CANtact's USB CDC interface and SocketCAN. With this working, you can open up Wireshark and sniff the bus.
Like any packet capture, this can be filtered, saved, and analyzed easily. Wireshark is a great utility for capturing packet data. The candump, cangen, and cansend utilities are also working with the tool.