#31653: Padding cells sent with 0ms delay cause circuit failures
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Reporter: pulls | Owner:
| mikeperry
Type: defect | Status:
| assigned
Priority: Medium | Milestone: Tor:
| 0.4.2.x-final
Component: Core Tor/Tor | Version: Tor:
| 0.4.1.5
Severity: Normal | Resolution:
Keywords: wtf-pad circpad-researchers-want | Actual Points:
042-should |
Parent ID: | Points:
Reviewer: | Sponsor:
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Comment (by mikeperry):
Bleh. It is unfortunate that clients need more accurate timers than
relays.
1. Do you have any sense as to if client-side timing is more important
because most test crawls tend to use client-side timings as opposed to
guard-side timings (and thus inherently get very high client-side timing
resolution and visibility into Firefox delays), or because of something
else that is just inherent to the HTTP protocol?
2. If I were to write a patch that allowed either clients or relays to
correctly fast-path this 0ms case to insert bursts of back-to-back packets
without the circuit failure, would that help?
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31653#comment:16>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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