On 03/04/2018 22:39, Brian Candler wrote:
Aha, "powerdns recursor protobuf export" was the search term I needed,
thanks!
https://doc.powerdns.com/recursor/lua-config/protobuf.html
One question. Protobuf messages are in general not self-delimiting[^1],
but I couldn't find any description of how PDNS delimits protobuf
messages. Are they wrapped? Or does tag 1 mark the start of each
message (which I note is the only required tag) [^2]?
Perhaps someone can share some code which is capable of receiving these
messages, e.g. as referred to in
https://github.com/PowerDNS/pdns/issues/6294
Thanks,
Brian.
[^1]
https://developers.google.com/protocol-buffers/docs/techniques#streaming
[^2] This would depend on the generator outputting tags in increasing
tag sequence, which is a "should" requirement for generators, but
parsers are not supposed to depend on it.
https://developers.google.com/protocol-buffers/docs/encoding#order
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