feat(traceroute6): IPv6 endpoint/source resolution (#42)#50
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localEndpoint resolves the source IPv6 via a UDP6 connect (no packets sent), honoring explicit --local-addr/--interface and rejecting non-IPv6 local addresses. Returns a clear error when the outbound interface can't be determined. Closes #42
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Summary
localEndpointresolves the source IPv6 via a UDP6 connect (no packets sent), honoring--local-addr/--interface.Test plan
go vet ./traceroute6/...go test ./traceroute6/...(interface-mapping test skips gracefully when no v6 addr present)Closes #42