[Bro] BroPing Connection Failure
Fabian Hugelshofer
fh at open.ch
Mon Nov 2 01:53:50 PST 2009
Thanks for the fast response, Robin.
Robin Sommer wrote:
> Sounds like a nasty race condition of some sort. The remote.log only
> shows that something weird is going on but isn't detailed enough to
> understand what's causing it. Please enable debugging output on both
> sides. For Broccoli, see here:
> http://www.icir.org/christian/broccoli/manual/c84.html#AEN814
>
> For Bro, configure with --enable-debug and then run with "-B comm".
> That should produce a debug.log with lots of information.
I enabled debugging on the client with "-d -d" (bropingc.txt) and on the
server with "-B comm" (bropings.txt). I also attached a tcpdump trace of
the communication.
Even if the server seems to finish the handshake, it doesn't send
anything back to the client (see tcpdump trace). As a result of that the
client times out.
I found out that compiling without "--disable-select-loop" doesn't show
these connection problems. I'm not sure whether this is related or a
coincidence. I can use this as a workaround, but would prefer another
solution.
> It would also be good if you could try it with the current
> development version from SVN to see if the problem still occurs with
> that one.
The current development version of Bro 1.5 does still show the same
behaviour.
Fabian
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