[Gajim-devel] Gajim-svn and problem with SOCKS5 proxy

Marcin Zajączkowski mszpak at wp.pl
Thu Jul 3 00:35:36 CEST 2008

On 2008-07-02 23:20, Yann Leboulanger wrote:
> Marcin Zajączkowski wrote:
>> Today I was debugging the problem at the privoxy side and it seems that
>> gajim hangs at the beginning of the conversation, before sending any
>> "real" data.
>> At gajim side it looks like (gajim.py -v):
>> DEBUG: CONNECTproxy start Plugging
>> <common.xmpp.transports_nb.NBSOCKS5PROXYsocket instance at 0x98015cc>
>> into <common.xmpp.client_nb.NonBlockingClient instance at 0x904e08c>
>> DEBUG: CONNECTproxy start Proxy server contacted, performing
>> authentification
>> DEBUG: CONNECTproxy sent
> that's strange that nothing is sent here. re-reading the code, here
> connector is suppose dto be sent. It's a base64 encoded string, and then
> we wait for the answer.
>> tcpdump shows following traffic on lo (szpak is a hostname):
> [...]
>> In the communication with pure Tor there is one more packet PSH,ACK from
>> Tor, which is confirmed by Gajim and next Gajim sends its request.
>> I'm not a TCP expert, but do you thing the lack of that one PSH packet
>> can cause that ACK is not push to Gajim and it waits for ACK forever (or
>> at least until a timeout)?
>> I have more detailed dump from Wireshark if someone is interested.
> Maybe full sent/reveiced chars could help

I sent a message a few days ago, but it got lost in a moderation 
process. The problem is probably that Privoxy is only a web proxy, not 
SOCKS5 proxy and doesn't "understand" Gajim.
Is it a probable reason in your opinion?

I have also attached a dump. It stops after 5 packets (packet 6 in a 
dump was triggered by closing Gajim).

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