[tor-talk] Data storage in cached-descriptors

["Fabio Pietrosanti (naif)" <lists@xxxxxxxxxxxxxxx>]

Hi all,

i've been thinking some days ago that the Tor infrastructure maybe a
very valuable infrastructure also for other software that would like to
stay distributed without a "central directory".

In order to do so, a server-software for a distributed network, may also
run a Tor Relay and write it's meta-data to cached-descriptors, de-facto
relying on Tor's Directory Authority infrastructure.

The question is:
- How much "custom data" a Tor Relay can write in cached-descriptors, by
running a Tor Relay?

In particular i noticed the following entries as valuable to store
custom-data without breaking other Tor relay functionalities:

- router
- contact

Those can be setup with the following torrc configuration:
* Nickname
* ContactInfo

How much data can be stored in those two variables?

-naif
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