> On my system (Ubuntu 12.10, amd64), IP_ADD_SOURCE_MEMBERSHIP is defined
> in /usr/include/x86_64-linux-gnu/bits/in.h (<bits/in.h>)
> and /usr/include/linux/in.h (<linux/in.h>). struct ip_mreq_source is
> defined in /usr/include/netinet/in.h (<netinet/in.h>).
> 
> On Debian GNU/Hurd, IP_ADD_SOURCE_MEMBERSHIP is defined nowhere
> in /usr/include and struct ip_mreq_source is defined
> in /usr/include/netinet/in.h (<netinet/in.h>) as on Linux.

OK, so it sounds like (someone) should submit a bug report for "Debian 
GNU/Hurd", noting that it needs to define IP_ADD_SOURCE_MEMBERSHIP (and 
IP_DROP_SOURCE_MEMBERSHIP) - presumably in "in.h" - in order for the 
source-specific multicast API (using "struct ip_mreq_source") to work.


Ross Finlayson
Live Networks, Inc.
http://www.live555.com/

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