[zeromq-dev] Does ZMQ "Over Send" Using OpenPGM

[Martin Sustrik]

On 10/27/2010 12:23 PM, Steven McCoy wrote:

> Incoming packets with the same port, the multicast address is ignored
> by the networking stack.

Ok. IIRC OpenPGM is using raw IP sockets.

There are no ports on that level so we can forget about them for now.

So what you are saying is that when you join a multicast group, network 
stack has no concept of individual application, so you'll get all the 
packets received on the particular interface, even those that other apps 
have subscribed to.

Example:

Application A subscribes for 239.0.0.1
Application B subscribes for 239.0.0.2

When packet arrives on 239.0.0.1 it is dispatched to both A and B.

Right?

Martin