I made a little chat applet using multicast. It works fine between computers on the same network, but fails if the computers are on different networks. Why is this? import java.io.*; import java.net.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class ClientA extends JApplet implements ActionListener, Runn...
I need to multicast an x11 application window to multiple (sai 100) clients in a lossy (wireless) environment. Right now, I was able to do it through screen grabbing (vlc) and h264 compression, but there should be a cleaner solution, something along the lines of a multicast NX session. Is there anything which could work with some glue,...
I have an application that is receiving data from multiple multicast sources on the same port. I am able to receive the data. However, I am trying to account for statistics of each group (i.e. msgs received, bytes received) and all the data is getting mixed up. Does anyone know how to solved this problem? If I try to look at the sender's...
2 vote down star I have an application that is receiving data from multiple multicast sources on the same port. I am able to receive the data. However, I am trying to account for statistics of each group (i.e. msgs received, bytes received) and all the data is getting mixed up. Does anyone know how to solved this problem? If I try to ...
I am going through some exam questions for the 70-536 exam and an actual question one developer posted on his blog has popped up in my exam questions. I cannot remember what his answer was .... but below is the question: You need to write a multicast delegate that accepts a DateTime argument and returns a bool value. Which code segment ...
I'm using multicast UDP over localhost to implement a loose collection of cooperative programs running on a single machine. The following code works well on Mac OSX, Windows and linux. The flaw is that the code will receive UDP packets outside of the localhost network as well. For example, sendSock.sendto(pkt, ('192.168.0.25', 1600)) ...
I'm developing a diagnostic tool on a PC with several Network Interfaces based on multicast/udp. The user can select a NIC, the application creates sockets, binds them to this NIC and adds them to the specific multicast group. The sending of multicast messages works fine. However receiving of messages only succeeds if I bind the sockets...
Hello, I'm making a script to to run a bunch of multicast asr streams, but I do not know how to "stop" or "end" a multicast asr stream after a certain amount of time. Loop Suspend does not do what I'm looking for. I've also tried to add a sleep command followed by a kill command, but they kick in after the stream ends (so that approach ...
My manager has asked me to assess what changes would be required to add multicast support to a socket-based TCP/IP networking program that is part of a trading system. As far as I can tell, from the perspective of a Java program, it doesn't seem to matter too much whether the program is unicast or multicast. Doesn't the Java networki...
I've been asked to look into adding multicast support to a Java trading system but, to be honest, I don't have the slightest clue what this could be for. Would this mainly be to allow the trading system to broadcast trade messages to different types of clients, say, a mobile phone as well as a server? Why might a trading system need mult...
I'm trying to figure out how to do the equivalent of an IPV4 broadcast using IPV6. I'm creating a non-blocking IPV6 UDP socket. From the side broadcasting i'm literally just doing a sendto "FF02::1" on port 12346. On the listen side I discovered I need to join the group so I did the following: ipv6_mreq membership; memset( ...
I'm not sure how best to approach my problem. I have a service with runs on a remote machine with receives and process UDP packets. I want the service to be able to re-send these packets to anyone that happens to want them (could be no-one, will typically be one machine, but may be more) I figured UDP Multicasting would be ideal - the s...
Hello folks, I've got a computer with multiple NICs - and UDPClient's send method continually fails. Here's the code: private static void receiveData() { recvSock = new UdpClient(PORT); //recvSock.Client.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastInterface, mainInterface); recvSo...
This following is a straightforward IPv4 UDP broadcast, followed by listening on all interfaces. sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, True) sock.bind(("", 1337)) sock.sendto("hello world", ("255.255.255.255", 1337)) while True: data, addr = sock.recvfrom(0x10...
Hello, everyone! I need help! I have a code in which send multicast datagrams. A critical piece of code: uint32_t port; int sockfd, err_ip; const uint32_t sizebuff = 65535 - (20 + 8); unsigned char *buff = (unsigned char *) malloc(sizebuff); struct sockaddr_in servaddr, cliaddr; struct in_...
Hi All do you know if in C# is it possible to create a communication between client and server using TOPIC names via multicast? Is there any class or free messaging system able to do that? Essentially a server open a communication and send data to a channel represented by a Topic name i.e. a String e.g. "MAIN_DATA" and all clients (mu...
How can I send a multicast ping in .NET ? So that all computers on the network respond ? ...
Hi folks, I made an application using boost.Asio using UDP multicast. I don't think the question is really specific to boost.Asio but to sockets programming in general, since boost.Asio's network facilities are mostly wrappers to socket functions. I constructed the application based on the multicast examples ( http://www.boost.org/doc/...
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.googl...
Hi, Currently I have a process listening and processing a multicast data stream. I'm thinking about seperate it into two processes, one listening, one processing, both will subscribe to the multicast traffic. my question is, will this lower the efficiency because now there are two listener to the multicast stream? ...