ya-packet-trace

Utility for tracing VPN packets

Usage

At any interesting point in the flow of VPN packets, invoke the macro like so:

packet_trace!(
    "possibly-slow-subsystem-before",
    {
        // code returning AsRef<[u8]> corresponding to the packet payload
    }
);

packet_trace_maybe!(
    "whatever",
    {
        // code returning Option<AsRef<[u8]>> corresponding to the packet payload
    }
);

Then, if the ya-packet-trace is compiled with the enabled feature, a log like possibly-slow-subsystem-before,<HASH>,<TS> will be printed at TRACE level to target packet-trace.

• <HASH> is 16-character, 0-padded hex-digest of FxHash output
• <TS> is current datetime as formatted by chrono with the following format string: %Y-%m-%dT%H:%M:%S%.6f%z.