Binding to your multicast address will prevent this and ensure you only get multicast packets on that port. EDIT: Fixed the code based on above comment, binding to multicast address, stored in 'group', as opposed to INADDR_ANY to receive only multicast packets sent to multicast address.

2013年3月5日 · I am studying about delegates. Few days back, I did a sample for a multicast delegates and reviewed here My previous question and clearly understood about multicast delegate. But now I trying to do a multicast delegate sample with a event. But I got some doubts while doing sample.

2012年5月22日 · The "join multicast group" operation (IP_ADD_MEMBERSHIP) is needed because it basically tells your network adapter to listen not only for ethernet frames where the destination MAC address is your own, it also tells the ethernet adapter to listen for IP multicast traffic as well for the corresponding multicast ethernet address. Each multicast IP ...

2015年10月14日 · Of course, one can ensure that multicast datagram never leave A, by creating and enforcing a loopback device for multicast: sudo ifconfig lo multicast sudo route add -net 224.0.0.0 netmask 240.0.0.0 dev lo But now, if I want to consume the UDP datagram simultaneously in another linux box, say, "B", there is no way they arrive there.

2013年5月31日 · It's possible that your switch is multicast aware, but if IGMP is disabled it won't notice if any attached hardware subscribes to a particular multicast group so it wouldn't forward those packets. To test this, temporarily connect two machines directly together with a cross-over cable. That should (AFAICR) always work.

2013年1月3日 · I'm trying to send a UDP Multicast Packet to: 230.185.192.108 so everyone subscribed will receive. A bit stuck. I believe it's broadcasting correctly, but can't seem to pick anything up with any cl...

2013年3月5日 · When you have a multicast delegate like d in your question, the return value is the return value from the last method of the invocation list of d. In general, for multicast delegates, it is most natural to use return type void. The compiler had no chance to guess that you were hoping for 10+2+3+4+5+6. You didn't specify it anywhere.

2017年12月13日 · On our phone system, we use multicast for paging. Occasionally someone will hit the button on accident and we have to fire up Wireshark to track down whodunit. So I've built a Powershell script to listen for new multicast packets and log them. Works great, but I can only bind to one port. I've tried using Start-Job and workflows, with no ...

2018年1月17日 · A source host sends data to a multicast group by simply setting the destination IP address of the datagram to be the multicast group address. Any host can become a source and send data to a multicast group. Sources do not need to register in any way before they can begin sending data to a group, and do not need to be members of the group ...

2009年4月24日 · If there is a WAN interface, the multicast doesn't work. So obviously, I figure the multicast is incorrectly going over the WAN interface (eth0), rather than the LAN (eth1.) So, I use the SO_BINDTODEVICE socket option to force the multicast socket to use eth1, and all is well.