The multicast address you choose also has and impact on the message scope/TTL. Multicast also has limitations, like it may or may not work on WANs, because not all routers allow multicast. At the same time I can shoot a single message to multiple hosts. The best part of UDP multicast is that it sits between unicast and broadcast and allows selective reception of multicasted messages. These I guess is obvious if you have spent some time in the Erlang world. # copied from: children =, ]), listener_spec, supervisor ( OutgoingSupervisor, , ]), worker ( MulticastHandler, ]) ] First I need to create a supervisor spec with the help of :ranch.child_spec like this:
#Netcat udp multicast how to
This ranch doc gives hints about how to do that, but this has to be adapted to Elixir. Only the ranch specific stuff stays under the :ranch tree: Now I want my Listener/Acceptor/Handler stuff to sit under my supervision tree like this: In my previous examples I used the default supervision tree under the :ranch application. I am working on integrating ranch for accepting TCP connections. Combining UDP multicast and the logarithmic broadcast.
Then I will slowly move to the big picture, the applicability of the useful bits in scalesmall and the rationale. This post goes in reverse order, rather than starting with something abstract and progress towards the results, I start with those things that may be useful for you independent of the scalesmall experiment. Please note that for this to work the local network must be capable of supporting multicast.Scalesmall W5 Udp Multicast Mixed With Tcp The above assumes that there is a multicast stream on a multicast group with ip address of 238.1.1.1 on port 5000. VLC then connects to this group on a specified port and plays the stream(s). In a multicast configuration the Encoder/Gateway sends the UDP stream to a multicast group, such as: 238.1.1.1. Multicast is used for one-to-many broadcast. Please make sure that your encoder/gateway is sending to this port and that all proper firewall rules are in place. The above assumes that VLC on your computer is listening on an incoming port 5000 for UDP streams.
#Netcat udp multicast free
It would not be an exaggeration to say that 99% of all support questions are in fact related to incorrect networking setup.įor those not familiar with VLC (VideoLan), it is a free multimedia player supporting most file and streaming media formats.
In most cases the first thing we do is ask the customer to confirm that their setup works with VLC, because if it works with VLC then their issue is most likely not IP networking related. As a company that specializes in the manufacture and sale of H.264/MPEG-2 video encoders and decoders we often find ourself having to offer technical support to our customers.