[tor-bugs] #18547 [Nyx]: Add hostnames and geoip to connection panel

[Tor Bug Tracker & Wiki]

#18547: Add hostnames and geoip to connection panel
-----------------------------+-------------------------
     Reporter:  atagar       |      Owner:  atagar
         Type:  enhancement  |     Status:  new
     Priority:  High         |  Milestone:
    Component:  Nyx          |    Version:
     Severity:  Normal       |   Keywords:  connections
Actual Points:               |  Parent ID:
       Points:               |   Reviewer:
      Sponsor:               |
-----------------------------+-------------------------
 Many releases ago Nyx
 [https://gitweb.torproject.org/nyx.git/tree/src/util/hostnames.py?id=1.4.5.0
 showed hostnames on the connection panel], but dropped this because it
 leaked our connections to our DNS provider. We can still get this
 information, but it must be on **every** relay or none at all.

 Turns out Onionoo already supports exactly what we want! In particular
 here's the query we want...

 [https://onionoo.torproject.org/details?fields=fingerprint,country,country_name,region_name,city_name,host_name&running=true&type=relay
 https://onionoo.torproject.org/details?fields=fingerprint,country,country_name,region_name,city_name,host_name&running=true&type=relay]

 Note that [https://onionoo.torproject.org/protocol.html Onionoo supports
 gzip compression] and we want to take advantage since it drops the size of
 our replies from 1.5 MB to 432.6 KB.

 For this we want a new **Daemon subclass** in **tracker.py**. This class
 would have a single **relay_details(fingerprint)** method that returns a
 struct with these attributes. If we meet the following two constraints
 then it calls Onionoo to update our cache...

 1. We make a request for a fingerprint the cache doesn't have.
 2. It's been over an hour since the relays_published date in our last
 reply (like the consensus Onionoo updates hourly, so no point in
 requesting more frequently).

 Note that we might not want all of these geoip fields (we'll need to
 fiddle with the panel to see what is nice to have).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18547>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online