[tor-bugs] #14843 [Tor]: Control: add command that fetches an HS descriptor on all hsdir for a given .onion

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#14843: Control: add command that fetches an HS descriptor on all hsdir for a given
.onion
----------------------------------------+------------------------------
 Reporter:  dgoulet                     |          Owner:  dgoulet
     Type:  enhancement                 |         Status:  new
 Priority:  normal                      |      Milestone:  Tor: 0.2.???
Component:  Tor                         |        Version:
 Keywords:  SponsorR tor-hs controller  |  Actual Points:
Parent ID:  #13209                      |         Points:
----------------------------------------+------------------------------
 Ticket for the command to be added to the control-spec document. An
 implementation ticket will be created once this is accepted. (You never
 know, might be a bad idea :)

 Ref: https://lists.torproject.org/pipermail/tor-
 dev/2015-February/008230.html

 The goal is to have a command on the control port that tells tor to fetch
 the HS descriptor on all HSDir for a given onion address. The full dump of
 the descriptor will be printed out as they come in. For instance:

 {{{
 C: setconf HS_DESC_FETCHALL onionorians.onion
 S: 250 OK
 [...]
 S: 650 HS_DESC REQUESTED [...] <-- same as "HS_DESC" event
 S: 650 HS_DESC RECEIVED [...] <-- same as "HS_DESC" event
 S: 650 HS_DESC INFO
 S: rendezvous-service-descriptor xz7f4tg4u3eam7iricupjz6qoupfyv3u
 S: version 2
 S: permanent-key
 S: -----BEGIN RSA PUBLIC KEY-----
 [...]
 }}}

 The command should also be able to take an optional list of hsdir to be
 used. This is an important feature needed for the HS health measurer
 (#13209).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/14843>
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