[tor-bugs] #13171 [meek]: meek's reflector should forward the client's IP address/port to the bridge.

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#13171: meek's reflector should forward the client's IP address/port to the bridge.
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     Reporter:  yawning      |      Owner:  dcf
         Type:  enhancement  |     Status:  new
     Priority:  normal       |  Milestone:
    Component:  meek         |    Version:
   Resolution:               |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by dcf):

 Can you be more specific about the metrics you're looking for? The one I
 can think of is user graphs that are broken down by pluggable transport
 ''and'' geoip, but there aren't graphs like that and they aren't planned:
 #10218.

 If you're just looking for user counts, we already have that. The user
 graphs don't come from counting unique IPs (they used to); they come from
 counting directory requests: see #8462 and https://gitweb.torproject.org
 /metrics-web.git/blob/HEAD:/doc/users-q-and-a.txt and
 https://research.torproject.org/techreports/counting-daily-bridge-
 users-2012-10-24.pdf.

 I'm a little opposed to adding a custom header, for a few reasons:
  * It can be considered a feature that the bridge doesn't know client IPs.
 From the client point of view, "screw your metrics, I want my anonymity."
  * We don't actually control the reflector code on any platform other than
 Google. When we use a CDN, the CDN just adds whatever headers it wants.
 Actually it seems that CloudFront
 [https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/RequestAndResponseBehaviorCustomOrigin.html#RequestCustomIPAddresses
 already adds X-Forwarded-For].
  * As I understand it, Tor could be modified to have its clients send a
 NETINFO cell containing the address. That's what we would want to do if
 metrics are really important, because it would generalize across other
 transports.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13171#comment:1>
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