commit a5a241a56e509c67214f70ebb21d177b111c3f66 Author: Karsten Loesing karsten.loesing@gmx.net Date: Wed Jan 15 13:01:47 2014 +0100
Revise proposal 147 based on discussion with Nick.
https://lists.torproject.org/pipermail/tor-dev/2014-January/006022.html --- proposals/147-prevoting-opinions.txt | 33 ++++++++++++++++++++++++++++++--- 1 file changed, 30 insertions(+), 3 deletions(-)
diff --git a/proposals/147-prevoting-opinions.txt b/proposals/147-prevoting-opinions.txt index b9c571e..a149e31 100644 --- a/proposals/147-prevoting-opinions.txt +++ b/proposals/147-prevoting-opinions.txt @@ -33,17 +33,41 @@ Design: and sign an opinion document as if they were generating a vote, except that they generate opinions earlier than they generate votes.
+ [This proposal doesn't say what lines must be contained in opinion + documents. It seems that an authority that parses an opinion + document is only interested in a) relay fingerprint, b) descriptor + publication time, and c) descriptor digest; unless there's more + information that helps authorities decide whether "they might + accept" a descriptor. If not, opinion documents only need to + contain a small subset of headers and all the "r" lines that would + be contained in a later vote. -KL] + [This seems okay. It would however mean that we can't use the same + parsing logic as we use for regular votes. -NM] + + [Authorities should use the same "valid-after", "fresh-until", + and "valid-until" lines in opinion documents as they are going to + use in their next vote. -KL] + [Maybe these lines should just get ignored on opinions. Or + omitted. -NM] + Authorities don't need to generate more than one opinion document per voting interval, but may. They should send it to the other - authorities they know about, at the regular vote upload URL, before - the authorities begin voting, so that enough time remains for the - authorities to fetch new descriptors. + authorities they know about, at + http://<hostname>/tor/post/opinion , + before the authorities begin voting, so that enough time remains for + the authorities to fetch new descriptors.
Additionally, authories make their opinions available at http://<hostname>/tor/status-vote/next/opinion.z and download opinions from authorities they haven't heard from in a while.
+ Authorities SHOULD send their opinion document to all other + authorities OpinionSeconds seconds before voting and request + missing opinion documents OpinionSeconds/2 seconds before voting. + OpinionSeconds SHOULD be defined as part of "voting-delay" lines + and otherwise default to the same number of seconds as VoteSeconds. + Authorities MAY generate opinions on demand.
Upon receiving an opinion document, authorities scan it for any @@ -54,5 +78,8 @@ Design: Authorities then begin downloading such descriptors from authorities that claim to have them.
+ Authorities also download corresponding extra-info descriptors for + any router descriptor they learned from parsing an opinion document. + Authorities MAY cache opinion documents, but don't need to.