feat(traceroute6): goscapy v6 probes and reply matching (#43) - #51
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Add hop aggregation, the Tracer probe builder, and the Sr1 reply matcher for traceroute6. buildProbe constructs IPv6 + ICMPv6 Echo / UDP / TCP SYN via goscapy layers, setting Hop Limit per hop and Traffic Class via MakeIPv6VerTCFL. The matcher accepts ICMPv6 Echo Reply (129), Time Exceeded (3) and Dest Unreachable (1), parsing the embedded original 40-byte IPv6 header (inner dst at [24:40]) past the 4-byte ICMPv6 error preamble to confirm the quoted probe is ours. Closes #43
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Summary
traceroute6/hop.go(ProbeResult/Hop/Result, RTT stats, addr dedup, reverse-DNS, enrichment) adapted for IPv6/ICMPv6 layer names.traceroute6/tracer.go: Tracer + concurrent run loop,buildProbeconstructing IPv6 + ICMPv6 Echo / UDP / TCP SYN via goscapy layers (Hop Limit per hop, Traffic Class viaMakeIPv6VerTCFL), and the Sr1buildMatcher/matchEmbeddedreply matcher.Test plan
go test ./traceroute6/— matcher accepts Time Exceeded / Dest Unreachable quoting our probe, rejects a different destination, Echo Reply identity guard, buildProbe per-protocol + port overrides.go vet ./traceroute6/,go build ./...,gofmt -lclean.Closes #43