[robocup-small] Referee Box Proposed Patch

[Tim Laue]

Hi,

the patch has been added and Armin Burchardt has prepared a new version
of the RefereeBox which is available at:

http://small-size.informatik.uni-bremen.de/referee:download

Please note that there is currently no new Windows binary. It would be
nice, if somebody could prepare one.

Best regards,

Tim

Am 03.04.2010 00:01, schrieb Christopher Head:
> Hello,
> I'd like to propose the attached patch to be applied to the referee box
> source code (it's based on the 2009-10-19 release tarball). The purpose
> of this patch is as follows:
> 
> At initialization time, the refbox examines the list of network
> interfaces on the machine and records the addresses of all interfaces
> other than "lo" (the loopback interface is excluded because it does not
> support multicast). When the refbox needs to send a packet, it iterates
> through the network interfaces and sends the packet out on each
> interface.
> 
> Corollary: if no network interfaces other than "lo" are found, no
> packet is ever sent.
> 
> This patch adds a clause which, if no non-lo interfaces were found,
> simply sends the packet out arbitrarily, without trying to set the
> multicast interface address at all.
> 
> This allows one to do tests on a machine without a network connection
> by simply running the refbox and the target software (which intends to
> receive packets) on the same machine, as long as one sets the
> MULTICASTADDRESS parameter in referee.conf to 127.0.0.1 and as long as
> the receiving software treats the failure of the IP_ADD_MEMBERSHIP call
> as nonfatal.
> 
> Thanks for your consideration,
> Christopher Head
> Software Lead
> UBC Thunderbots

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Dipl.-Inf. Tim Laue
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