Hello All!

I've been trying every possible combination and cannot get anything working. (>_<)

This is I think the closest I've got, I think the problem may be with the 3 argument.  I'm not sure how to join the Multicast IP membership?
(this code currently does not work - throws error:
'Unable to set socket option: An invalid argument was supplied'.)

Socket listen_socket = new Socket(AddressFamily.INET, SocketType.DGRAM, ProtocolType.UDP);
listen_socket.setOption(SocketOptionLevel.IGMP, SocketOption.IPV6_JOIN_GROUP, 1);
auto adr = getAddress("0.0.0.0", "56000");
listen_socket.bind(adr[0]);


This is how the messages are sent (which works fine):

Socket udp_broadcast_soc = new UdpSocket();
udp_broadcast_soc.setOption(SocketOptionLevel.SOCKET, SocketOption.BROADCAST, 1);
auto adr = getAddress("239.192.0.10", 54000);
udp_broadcast_soc.sendTo(<message>, adr[0]);


Please Please Please Help, I am desperate!

Many Thanks in Advance for your time & attention,
-joe

On 8/12/18 9:12 PM, Joe wrote:
> Hello All!
> 
> I've been trying every possible combination and cannot get anything working. (>_<)
> 
> This is I think the closest I've got, I think the problem may be with the 3 argument.  I'm not sure how to join the Multicast IP membership?
> (this code currently does not work - throws error:
> 'Unable to set socket option: An invalid argument was supplied'.)
> 
> Socket listen_socket = new Socket(AddressFamily.INET, SocketType.DGRAM, ProtocolType.UDP);
> listen_socket.setOption(SocketOptionLevel.IGMP, SocketOption.IPV6_JOIN_GROUP, 1);
> auto adr = getAddress("0.0.0.0", "56000");
> listen_socket.bind(adr[0]);
> 
> 
> This is how the messages are sent (which works fine):
> 
> Socket udp_broadcast_soc = new UdpSocket();
> udp_broadcast_soc.setOption(SocketOptionLevel.SOCKET, SocketOption.BROADCAST, 1);
> auto adr = getAddress("239.192.0.10", 54000);
> udp_broadcast_soc.sendTo(<message>, adr[0]);
> 
> 
> Please Please Please Help, I am desperate!
> 

This needs more context. What is your platform? Have you tried doing it in C to see what works?

One thing that stands out so far is you are using IPV4 addresses and constants everywhere, yet you are using IPV6_JOIN_GROUP socket option.

-Steve

On Monday, 13 August 2018 at 01:12:16 UTC, Joe wrote:
> Please Please Please Help, I am desperate!
>
> Many Thanks in Advance for your time & attention,
> -joe

I implemented multicast support in vibe.d, I hope looking at the source can help you:

https://github.com/vibe-d/vibe.d/blob/master/core/vibe/core/drivers/libevent2.d#L1129

Also, shouldn't both sending and receiving ports be the same?

Where I use it I call addMembership and then canBroadcast on a vibed socket, and it has worked for me.

It wouldn't be difficult to port that back to std.socket.