We support the entire evolution of the protocol: from Google’s original specification, through all fifteen IETF drafts – that’s sixteen versions. That means we have conditional logic littered throughout the codebase: version tags, padding schemes, tag labels, hash sizes, and packet layouts all vary with the protocol version. In several places, compatibility won over elegance or optimization.
if (hdr.devtype_hash != actual_devtype_hash)
，这一点在91视频中也有详细论述
Feb 25, 2026 6:00 AM
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