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40ee0847d9
Dependency-free (stdlib-only) libpcap/Ethernet/IPv4/TCP parser that answers one question: does OmniRoute or the far end (Caddy, on behalf of whichever client it's proxying) close the TCP connection first? Dashboard-level 499s only tell us OmniRoute detected a dropped connection, not which side's FIN/ RST actually landed first -- this settles it from the raw packets. Handles classic Ethernet and both "Linux cooked" linktypes (SLL/SLL2, what `tcpdump -i any` produces) since rootless Podman has no host-visible bridge interface to capture on directly -- the capture instructions in the script document the nsenter-into-container-netns workaround. Adds --find to grep every reassembled stream for a literal marker string -- in practice the reliable way to locate one specific request (the x-correlation-id header isn't echoed on every hop) is dropping a fresh UUID into an actual chat message and searching for it, then cross-referencing the matched stream's timing against data/call_logs/<date>/*.json. Co-authored-by: Markus Hartung <markus.hartream@gmail.com>