[erlang-questions] Multicast UDP and Linux

Rob Elsner thatsnotright@REDACTED
Wed Jun 10 05:33:27 CEST 2009

Is it possible to use the {raw} option for gen_udp:setopts to pass a
struct?  I looked at the source, it seems correct, but when I format a
struct that I believe matches ip_mreq_source, I must be doing
something wrong because no IGMPv3 packet is produced.  Of course, I
don't know if this option is checkable via a getopts because the group
management is done on the router and I would hope that the linux
kernel doesn't store what it thinks is its state.

Has anyone had luck passing arbitrary structs via the raw option for
setopts?  Any hints?


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