Re: counting the number of connections?

From: David Kågedal <davidk@lysator.liu.se>
Date: Mar 5, 2009, 16:18 UTC
Message-ID: <87ab80j649.fsf@krank.kagedal.org>
In-Reply-To: <be6fef0d0902272244q468b1fa4sacdc15afa9a65f15@mail.gmail.com>

Tay Ray Chuan <rctay89@gmail.com> writes:

Show 15 quoted lines

> Hi,
>
> some time ago I noticed curl doesn't remember your credentials (apart
> from those it can get from ~/.netrc), and very recently there was an
> thread on repeated prompting for credentials while pushing to https.
>
> I've written a simple patch series, which allows git to play nice
> without curl_multi. That is, git uses a single persistent connection
> throughout.
>
> However, I'm at a loss at how to test for this. How does one count the
> number of connections made during the lifespan of a program's
> execution? So far, I've been relying on my firewall log (Comodo on
> windows). Perhaps there a more operating system/software-agnostic
> method to do this?

You could set up a single-use tcp forwarder which will make any second connection fail. Using socat, for instance:

  $ socat tcp-listen:2222,bind=localhost tcp:my.server:22 &
  $ nc localhost 2222
  SSH-2.0-OpenSSH_5.1p1 Debian-3ubuntu1
  ^C
  $ nc localhost 2222
  localhost [127.0.0.1] 2222 (?) : Connection refused

-- 
David Kågedal