Multicast refers to one-to-many network transmission options, where packets will be automatically propagated just to those nodes wishing to receive them. IP-based multicast is the common case, though other multicast implementations exist.
Questions tagged [multicast]
1621 questions
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Java broadcast group no longer working
I have designed a system in Java where a server creates a broadcast group and sends packets to clients who are also part of the same group. It is a simple multicast socket according to the Java documentation,…
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Cannot capture multicast packets - C#
Using Visual Studio 2010 - C#
Our agency has Utility Mobile Vehicle Rockets. These devices are essentially a mobile wifi router that you plug a broadband card into. They also have a built-in GPS module, and one of the features of the device is…
Jason Miller
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2 answers
Multicast data overhead?
My application uses multicast capability of UDP.
In short I am using java and wish to transmit all data using a single multicast address and port. Although the multicast listeners will be logically divided into subgroups which can change in runtime…
Allahjane
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Multicasting big packet contain all info to multiple clients vs individual packets to targeted clients
I'm writing a C++ application MyMasterApp which sends information (OSC via UDP) to multiple clients (about 5-10), which are mobile devices (Android or iPhone) via wifi.
Each device is to receive unique information, of the same type. Probably about…
memo
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Java multicast socket not received out of localhost
I, i'm developing a mobile application (Android) that works with a server application on PC side. I need to use multicast UDP datagrams to sending information at smartphone connected to WIFI area.
I have two module:
The first module is a UDP…
Alessio Melani
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multi-cast fine tuning - the right approach?
I am the maintainer of some legacy code in my company (sigh). The code uses a fair bit of multi-cast even though 98% of applications are all running on same box. It was done this way to distribute applications across boxes should the need arise to…
Fanatic23
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JGroups does not work on different machines
I made a connector to a cluster by jgroups. My instances of connectors do work right and get others messages when they are running on a same machine, but they do not catch others messages when they are running on tow different machines.
My JGroups…
Saeed
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Throttling multicast datagrams
I have an application that is sending some UDP packets using multicast. I looked at the network traffic and there seems to be a lot of ancillary packets related to using multicast. I don't totally understand it, but does multicast by nature result…
Xofo
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Android live streaming multicast
I have built a Android application based on FFMPEG, reference http://www.roman10.net/how-to-build-android-applications-based-on-ffmpeg-by-an-example/.
Now, I want to live streaming multicast ?
How to convert multicast to unicast url to live…
user1573559
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how to join a multicast group using igmp v3 in C
In order to join a multicast group I am accustomed to having seeing code like this:
struct ip_mreqn mreq;
mreq.im_address.s_addr = INADDR_ANY
mreq.imr_ifindex = 0;
inet_aton("232.etc..", $mreq.imr_multiaddr);
setsockopt(descriptor, SOL_IP,…
Palace Chan
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How I can receive UDP multicast from all subnets?
The following code receive only UDP multicast in my subnet.
How I can receive UDP multicast from all subnets?
sd = socket(AF_INET, SOCK_DGRAM, 0);
int reuse = 1;
setsockopt(sd, SOL_SOCKET, SO_REUSEADDR,
(char *) &reuse,…
AndreyKeen
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Collection replication using multicast
need a technology (open source or build myself) usable from C# that allows me to in one process maintain a “master” collection of objects (says a Dictionary of Customer objects) and in n other “client” processes maintain an in-memory duplicate of…
cppAndcsharpHero
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In C, how to periodically send UDP datagram to multiple peers (possibly thousands)?
(I'm new to network programming, and I am working on C in Linux)
I followed Beej's guide for a simple UDP listener-talker and I know how to create a socket and send that to a destination (with calls to getaddrinfo() and socket() using…
superlumi
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Jgroups multicast file transfer
I try to do a multicast file tranfer with jgroups. It works when I put a sleep between each messages. When I remove this sleep, my received file has the same size but it is not openable (order is maybe not respected).
I read my file with…
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Two tomcat instances with different multicast addresses are grouped when using Jrockit
I am trying to setup tomcat cluster upon Jrockit 1.6.0_45-b06, and faced with a problem.
It seems that Jrockit does not use Multicast address to group, I have setup 2 instances of tomcat in the same os, and give them difference multicast address,…
sanigo
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