Hi Wireshark community,

Greetings from me!

I have one question related to classifying the flow as QUIC protocol.
>From the attached pcap file, we can see if missing Initial/Handshake
packets, Wireshark doesn't deem the flow as QUIC flow, and I am just
wondering whether it makes sense to classify the flow as QUIC if:
(1) The flow uses UDP 443 port;
(2) The first two bits of the packet meet the short header packet
requirement, i.e., (first_byte & 0xc0) == 0x40.

I am not sure whether the above criteria is too broad that can
misclassify many flows as QUIC, and am very appreciative if someone
can give some insights, thanks very much in advance!

Best Regards
Nan Xiao

Attachment: quic_missing_initial.pcap
Description: Binary data

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