TCP & UDP Binding listen for multicast packets

Add-ons Bindings
1

Hi,

I’m try’ing to listen a packet that is sent to a multicast address. Through tcpdump command I see the packet:

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on any, link-type LINUX_SLL (Linux cooked), capture size 65535 bytes
18:09:24.557609 IP 192.168.1.65.22600 > 224.192.32.19.22600: UDP, length 363

But in the tcp/udp binding log I don’t see anything.

If force to send a packet to the server and port (not to a multicast address), I see the log in the binding:

nc -u 192.168.1.1 22600
teste
2018-09-19 18:07:21.875 [DEBUG] [g.tcp.AbstractDatagramChannelBinding] - Received teste
 on the listener port from /192.168.1.1:53228
2018-09-19 18:07:21.876 [WARN ] [g.tcp.AbstractDatagramChannelBinding] - Received data teste
 from an undefined remote end /192.168.1.1:53228. We will not process it
2018-09-19 18:07:21.877 [WARN ] [g.tcp.AbstractDatagramChannelBinding] - No channel is active or defined for the data we received from /192.168.1.1:53228. It will be discarded.

The tcp/udp binding does not receive multicast packets?

Best Regards,
Fernando Gomes

2

I would be surprised if it did. There is no mention of support for it in the README and the configuration for handling multicast would be pretty different.

3

You known any binding/workaround to capture multicast packets?

Best Regards,
Fernando Gomes

4

I do not. You might need to write something external to OH that reports the contents to OH using the REST API or MQTT or the like.