[erlang-questions] igmp v3 and join source specific multicast

[Mark Geib]

Using the code below I am able to join a source specific multicast
group and receive the datagrams from the specified source. However,
when I open a second socket and join a second group,  i.e. different
multicast address, I start to see the datagrams from both groups on
both sockets. Any ideas would be greatly appreciated.

Bin = << GroupIp/binary, LocalIp/binary, SourceIp/binary >>,

{ok, Socket} = gen_udp:open(Port,
                            [inet,
                             binary,
                             {active,true},
                             {reuseaddr,true},
                             {recbuf, RecBuf},
                             {buffer, Buffer},
                             {read_packets, ReadPackets},
                             {raw, 0, 39, Bin}]),

Thanks,
Mark.