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[tor-bugs] #2812 [- Select a component]: TorCtl Zombie Connections
#2812: TorCtl Zombie Connections
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Reporter: atagar | Owner:
Type: defect | Status: new
Priority: normal | Milestone:
Component: - Select a component | Version:
Keywords: | Parent:
Points: | Actualpoints:
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Hi, when TorCtl fails to authenticate it leaves a connection to the
ControlPort. To repro...
a. Start TBB with it configured to use cookie authentication. TBB uses
relative paths for cookies so TorCtl is gonna fail to connect (separate
issue, related to https://trac.torproject.org/projects/tor/ticket/1101).
On a side note, arm has a somewhat platform specific workaround for this
(no windows) if you're interested.
b. Check initial connections. You'll see one for Vidalia.
atagar@fenrir:~/Desktop/arm/src$ netstat -np | grep
"127.0.0.1:9051.*ESTABLISHED 5267/tor"
tcp 0 0 127.0.0.1:9051 127.0.0.1:36863
ESTABLISHED 5267/tor
c. Have TorCtl try (and fail) to connect a few times:
>>> from TorCtl import TorCtl
>>> TorCtl.connect()
Failed to read authentication cookie (file doesn't exist):
./Data/Tor/control_auth_cookie
>>> TorCtl.connect()
Failed to read authentication cookie (file doesn't exist):
./Data/Tor/control_auth_cookie
d. Check again with netstat. You'll see a new connection for each attempt
you made:
atagar@fenrir:~/Desktop/arm/src$ netstat -np | grep
"127.0.0.1:9051.*ESTABLISHED 5267/tor"
tcp 0 0 127.0.0.1:9051 127.0.0.1:45175
ESTABLISHED 5267/tor
tcp 0 0 127.0.0.1:9051 127.0.0.1:36863
ESTABLISHED 5267/tor
tcp 0 0 127.0.0.1:9051 127.0.0.1:45177
ESTABLISHED 5267/tor
Note that calling close on the connections or sockets is *not* sufficient
(nor is most other things I've tried this last hour). The only thing I've
found that does the trick is calling "s.shutdown(socket.SHUT_RDWR)" on the
failed socket (see attached patch).
Cheers! -Damian
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2812>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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