[tor-bugs] #31782 [Core Tor/Tor]: Circuit padding is not subject to flow control

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed Sep 18 17:31:11 UTC 2019


#31782: Circuit padding is not subject to flow control
------------------------------+--------------------------------------------
     Reporter:  mikeperry     |      Owner:  (none)
         Type:  enhancement   |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  circpad-researchers-maybe-want
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+--------------------------------------------
 Because Tor's flow control only applies to RELAY_COMMAND_DATA cells, the
 padding injected by circuit padding is not subject to flow control
 (RELAY_COMMAND_SENDME).

 For small amounts of padding, this is insignificant, but for larger
 amounts, it may be desirable to subject it to flow control, or to create
 some other form of flow control specifically for padding.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31782>
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