multicast

For Internet Protocol (IP) I can use multicast : in IPv4: Internet Group Management Protocol (IGMP) in IPv6: Multicast Listener Discovery Also, in example, for UDP I can use: broadcast - to send packet to range of addresses multicast - to send packet to list of specified addresses But can I use something of these for TCP? No, you can't. TCP is a protocol for communication between exactly two endpoints. Compared to UDP it features reliable transport, that means, that packets get not only send, but it is expected that the peer acknowledges the receipt of the data and that data will be

after progress on the question how to create socket.io multicast groups , I found making rooms a great way to do what I needed. However, it would be great to know about all the rooms, without an extra data-structure. Is it possible to get a list of all rooms on the server from the server socket? Alfred The short answer: io.sockets.adapter.rooms I analysed io : I got the following output: { server: { stack: [ [Object], [Object], [Object], [Object], [Object], [Object] ], connections: 3, allowHalfOpen: true, watcher: { host: [Circular], callback: [Function] }, _events: { request: [Function],

Has anyone gotten Multicast to work on Android 2.2, specifically JmDNS for Bonjour service detection. There are many questions & answers from the Android 1.5->2.0 timeframe, including on stackOverflow, that indicate varying levels of success, and a bug in the bug tracker that indicate it was fixed, and closed, for 2.2 ( http://code.google.com/p/android/issues/detail?id=2323 ) . I've tried the "TuneControl" source code, but that worked on ~1.5 and has not been updated, and does not work for me on 2.2. So, the questions... 1) Has anyone seen multicast work on 2.2, specifically JmDNS, and

I was trying to write a simple program communicating between kernel and user space using Netlink. Basically here's what I wanted to achieve: User space program starts binding to a user defined multicast group. Insert kernel module Kernel module sends a message to this multicast group User space program receives the message Here's my code: ======User space program====== #include<stdio.h> #include<string.h> #include<stdlib.h> #include<sys/socket.h> #include<linux/netlink.h> #include<sys/types.h> #include<unistd.h> #define MYPROTO NETLINK_USERSOCK #define MYMGRP 0x21 //User defined group,

I have a problem with setting the TTL on my Datagram packets. I am calling the setTTL(...) method on the packet before sending the packet to the multicastSocket but if I capture the packet with ethereal the TTL field is always set to 0 pfranza Funny that you should ask this, because I just wrote about this yesterday , I was having the same problem about 6 months ago. Basically you have to set an special system property telling the JVM to use an IPv4 stack: -Djava.net.preferIPv4Stack=true To implement pfranza's fix in Oracle, where you don't have a command line: Set the property java.net

How do you programmatically configure hazelcast for the multicast discovery mechanism? Details: The documentation only supplies an example for TCP/IP and is out-of-date: it uses Config.setPort(), which no longer exists. My configuration looks like this, but discovery does not work (i.e. I get the output "Members: 1" : Config cfg = new Config(); NetworkConfig network = cfg.getNetworkConfig(); network.setPort(PORT_NUMBER); JoinConfig join = network.getJoin(); join.getTcpIpConfig().setEnabled(false); join.getAwsConfig().setEnabled(false); join.getMulticastConfig().setEnabled(true); join