[tor-bugs] #19859 [Core Tor/Tor]: Expose stream isolation information to controllers

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#19859: Expose stream isolation information to controllers
-------------------------------------------------+-------------------------
 Reporter:  nickm                                |          Owner:  (none)
     Type:  enhancement                          |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.4.3.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-hs tor-control dns isolation     |  Actual Points:
  needs-spec needs-design term-project           |
Parent ID:                                       |         Points:  3
 Reviewer:  nickm                                |        Sponsor:
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Comment (by JeremyRand):

 Thanks for the review Nick!

 > So what if, instead of having a bunch of different ISOLATE_XYZ flags, we
 have one item that is a comma-separated list of entries flags, each
 matching the name of one of the other fields?

 If I'm understanding you correctly, you're suggesting having an
 `ISO_FIELDS` field, such that `ISO_FIELDS=FOO,BAR` means that the `FOO`
 and `BAR` fields of the `STREAM` event represent fields that the SOCKS
 port is configured to isolate on?  I think this is a good idea, but there
 is a caveat.  Tor can isolate based on destination address, destination
 port, and client address, but those don't have a 1:1 correspondence to
 `STREAM` fields (they're components of fields that contain both an address
 and a port).  So in order for this to work, I'd need to add 3 additional
 fields to `STREAM` events that are arguably redundant.  Is that
 acceptable?

 Agreed on the other spec suggestions.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19859#comment:15>
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