141: exit policy summary
peter at palfrader.org
Thu Aug 14 23:03:37 UTC 2008
On Mon, 11 Aug 2008, Peter Palfrader wrote:
> Similarly to IP address, ports, timestamp, and bandwidth a consensus
> should list the exit policy matching the descriptor digest referenced
> in the consensus document.
That doesn't work so well, since some voters can "abstain" - simply by
being too old to support consensus-method 5 and the associated new
fields in votes.
the new version reads:
| 3.4.1 Consensus selection
| When building a consensus, authorities have to agree on a digest of
| the server descriptor to list in the router line for each router.
| This is documented in dir-spec section 3.4.
| All authorities that listed that agreed upon descriptor digest in
| their vote should also list the same exit policy summary - or list
| none at all if the authority has not been upgraded to list that
| information in their vote.
| If we have votes with matching server descriptor digest of which at
| least one of them has an exit policy then we differ between two cases:
| a) all authorities agree (or abstained) on the policy summary, and we
| use the exit policy summary that they all listed in their vote,
| b) something went wrong (or some authority is playing foul) and we
| have different policy summaries. In that case we pick the one
| that is most commonly listed in votes with the matching
| descriptor. We break ties in favour of the lexigraphically larger
| If none one of the votes with a matching server descriptor digest has
| an exit policy summary we use the most commonly listed one in all
| votes, breaking ties like in case b above.
| .''`. ** Debian GNU/Linux **
Peter Palfrader | : :' : The universal
http://www.palfrader.org/ | `. `' Operating System
| `- http://www.debian.org/
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