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Re: [tor-bugs] #22934 [Core Tor/Tor]: PADDING cells can't be sent immediately after a VERSIONS cell
#22934: PADDING cells can't be sent immediately after a VERSIONS cell
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Reporter: teor | Owner:
Type: defect | Status: new
Priority: Medium | Milestone: Tor: 0.3.2.x-final
Component: Core Tor/Tor | Version:
Severity: Normal | Resolution:
Keywords: tor-spec, tor-relay | Actual Points:
Parent ID: #18856 | Points: 0.5
Reviewer: | Sponsor:
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Comment (by teor):
It appears that the channel state isn't updated until the read completes.
If a send no or one VPADDING cell between VERSIONS and PADDING, the
connection is closed.
If a send 1000, the connection completes.
For a script that demonstrates this, see:
https://github.com/teor2345/endosome/blob/master/client-or-22934.py
I think we should fix this by changing the channel state immediately after
the VERSIONS cell is read, rather than after all the cells in the buffer
are processed.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22934#comment:1>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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