July 2014 - tor-dev - lists.torproject.org

[GSoC 2014] Revamp GetTor status report #3
by Israel Leiva 02 Jul '14

02 Jul '14

Hi all! This is my third report for the Revamp GetTor GSoC project. It's not much, since I'm finishing my semester and I haven't had much time to do complex stuff. Achievements: [*] Fixed minor issues pointed out by my mentor on the Core module (still one remaining). The biggest thing was to eliminate unnecessary inspection of the stack to know which service was calling. I implemented a rather simple solution: the service should be specified when calling the Core module. This will help for statistics. [*] Create the basis of the SMTP module. For now, it has the main classes and methods to be used, with basic documentation and logging. There are some methods with working code, but nothing definitive yet. [*] Created a dummy script to test the SMTP module. For now, it just reads emails from stdin (eml files). Goals until next bi-weekly report: [+] Fix the one remaining issue on the Core module. [+] Have a functional SMTP module, hopefully tested on a real server. As always, you can check what's been done on [0]. As I mentioned earlier, I'm finishing my semester and I'll be free by mid of the next week. After that, I'll considerably increase my productivity in order to achieve the timeline proposed. [0]: https://github.com/ileiva/gettor/tree/master/src Best, -- israel

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(no subject)
by Gareth Owen 01 Jul '14

01 Jul '14

Dear all I'm working on a tor research project and am having difficulty understanding the SENDME cells. The tor spec acknowledges that it isn't particularly clear so I would welcome some clarification please. The spec says that *all* nodes in a circuit maintain a send and receive window, and that this window is decremented on each RELAY_DATA and incremented on each SENDME. Cells that are neither of these do not affect the window size. The problem I have understanding is, that only edge nodes will know whether a cell is a RELAY_DATA, the intermediate nodes only know that its a RELAY but not what type. So, if only RELAY_DATA decrements the window size, and intermediate nodes cannot spot these, what point is there in intermediate nodes having a window? Any help greatly appreciated. Gareth --- Dr Gareth Owen Senior Lecturer School of Computing, University of Portsmouth W: ghowen.me

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Re: [tor-dev] I have a group at internet archive that are, interested in buying a lot of OnionPi's
by Virgil Griffith 01 Jul '14

01 Jul '14

It's already established that, for clients, onion-pi's are discouraged---onion-pi wifi doesn't protect enough (I.e., at all) from browser-based attacks. Given that, The question is now, "Are onion-pi's are good enough to be useful relays?" Roger said no. Is there a more informed opinion on this matter---particularly from someone who has actually tried this? Are there any relays that are known to run on onion-pi? If an onion-pi is insufficient for a useful Tor relay, what is the limiting reagent? What more does it need to be useful? -V

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