All things related to multicast

[Stig Venaas <>]

Ruud Toonders wrote:
> Hi all,
>  
> First of all, thanks for the helpfull discussions which we all can have here
> at this forum. It really helps, anyhow I am getting more and more a
> multicast freak. 
>  
> I have downloaded Alan's SSMified verion (which was setup together with Stig
> Venaas) from your website at: http://www.columbia.edu/~alan/igmp/rtpqual.c.
>  
> However i am working on compiling this version on Cygwin, which works for he
> ASM part of the code. As soon as i call the openSSM function in the
> succesfull compiled program, the program exits with error:
> "recvfrom: Bad file descriptor"
>  
> Any clue what i am doing wrong or where to look?

OK, so you're compiling this to run on Windows? The setsockopt() for SSM
join on Windows is different from Linux. If you look at the code for
ssmping at http://www.venaas.no/multicast/ssmping/
you can look at joinch.c for how to do SSM join on XP/Vista,

Stig

>  
> regards,
>
> Ruud Toonders
>
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> 14:16
>