[Dev] Using qtox via tor

[Klaus Ethgen]

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Hi Folks,

please excuse that I jump onto this list. I just subscribed for this
issue and will not stay here forever. :-) 

I try to debug a strange problem in qtox. When I use it without any
proxy, everything works. But when I use socks proxy via tor (I even
tried http proxy with the same result), it fails with the message
"attempted to send message of length 113 on uninitialised socket" and no
connection will be established.

Versions:
OS: Linux
Dist: Gentoo
qtox: 1.16.3 (but tried also with 9999, that is git HEAD.)
toxcore: 0.2.5 (but tried also with 9999, that is git HEAD.)

With versions of toxcore 0.1.10 and qtox 1.11.0, it worked well but
unfortunatelly, the qtox-1.11.0-emerge is not available anymore and I
didn't safe a binary package.

I am not fully sure but I believe that it worked also with the versions
above once before one upgrade.

So I tried to find why it failed recently. That brought me to
toxcore/network.c where this logic was changed heavily around version
0.2.2. However, I cannot find the reason why proxy connections are
failing.

It might be of interest that libsodium was upgraded too around the time
when it broke. But I cannot find any connection between libsodium and
proxy stuff.

As I don't know the qtox and toxcore code that good that I am able to
search deeper, I want to ask you if you have any idea, what could fail
around proxy stuff. If it is a bug, I can open a bug issue on github but
I am even not convinced if it is a bug of toxcore or qtox.

Ah, yes, I seen issue #5174 of qtox. But this is closed and I see only
marginal similarity to my problem.

Regards
   Klaus
- -- 
Klaus Ethgen                                       http://www.ethgen.ch/
pub  4096R/4E20AF1C 2011-05-16            Klaus Ethgen <Klaus at Ethgen.ch>
Fingerprint: 85D4 CA42 952C 949B 1753  62B3 79D0 B06F 4E20 AF1C
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