Wild idea: Generate qlogs from pcaps

[larseggert]

I had been noodling around the idea of visualizing a QUIC connection similar how qvis does it, but based on a network trace (pcap). My strawman was reading a pcap file, using tshark to parse the packets/frames, and then visualizing things based off that. However, I quickly realized I would need to implement quite a bit of machinery to properly manage the connection state. Almost like a proper QUIC stack...

So that made me wonder whether we could drive a neqo connection by feeding it captured IP payloads from a pcap file, and have it generate a qlog for us, which we then could visualize with the normal qlog tools. Packet I/O and time are (mostly) already not part of neqo, which helps a lot.

We could also compare the packets that neqo generates in response to being fed pcap payloads against what the pcap recorded as a response. Might be useful for regression testing, etc.

[mxinden]

For the record, linking previous work here.

https://github.com/quiclog/pcap2qlog