Re: [tor-dev] Link protocol version

To: tor-dev <tor-dev@xxxxxxxxxxxxxxxxxxxx>

Subject: Re: [tor-dev] Link protocol version

From: ÐÐÐÐÐÐÐÑ ÐÐÑÑÑÑÐÐÐ <vilgeforce@xxxxxxxxx>

Date: Tue, 28 Oct 2014 14:37:51 +0300

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Thank you, now I know that Descriptor's field is obsolete :-)

Node info:
name = xshells
identity = +czI3CZ3wvWJREtPs5VrOd8b8Ts
host = 178.217.187.39
orPort = 443
dirPort = 80
version = 0.2.5.8-rc
flags = V2Dir Fast Valid Exit Stable HSDir Running Guard

The data I sent: "00 00 07 00 02 00 03"

Is it strange for node to support link v3 and link v4? By reading tor protocol specification I understnd it's OK. BTW, all the nodes I try responded with v3+v4 in VERSIONS cell.

2014-10-28 14:32 GMT+03:00 Roger Dingledine <arma@xxxxxxx>:

On Tue, Oct 28, 2014 at 02:19:17PM +0400, ???????????????? ?????????????????? wrote:
> I'm trying to understand link protocol versions, but I have some problems.
> I requested descriptor from the root server and it contains line "protocols
> Link 1 2 Circuit 1". Then I connected to the node, sent VERSIONS cell and
> got a responce: "00 00 07 00 04 00 03 00 04". But according to that
> responce, the node supports link protocol v3 and v4, not v1 and v2.
> Could you please explain that moment?

I think the versions listed in the descriptor are no longer considered.
You should instead listen to the VERSIONS cell. I've opened
https://bugs.torproject.org/13593 so we can fix the inconsistency.

That said, what relay is this? It seems weird that it would tell you
that it supports link versions 4, 3, and 4.

--Roger

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