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Questions tagged [multicast]

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.

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Receiving multicast data from different groups on the same socket in linux

Say I want to receive data from 239.1.2.3:20000 and also from 239.4.5.6:20001 in a linux C program. Can I do so with just one socket? I can of course join multiple groups on the socket using the IP_ADD_MEMBERSHIP setsockopt option, but, since the…
MK.
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C++ RTP Multicast of a .ts file with SDP error

I'm using VLC player as the receiver for this RTP stream; under "Open Network Stream" I have rtp://@239.255.255.254:49150 I created a udp client with a host ip as localhost with a host port of 49149. I have a .ts file that I read in. I originally…
Shaun
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get UDP Multicast stream in PHP

I am trying to receive a UDP multicast stream in PHP. The receive command never gets anything and waits forever. I can watch the stream using VLC player so the stream is accessible on my machine. Any help on how to do this using PHP is highly…
user1285822
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zeromq epgm pub/sub not working

I am working with the node.js example. I have installed openpgm and zeromq 3.2 on my ubuntu 12.10 machine. Here's the code: var zmq = require('zmq') , port = 'epgm://eth0;239.192.1.1:5555'; var socket = zmq.socket('pub'); socket.identity =…
Munim
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tomcat session replication without multicast

i am planning to use 2 dedicated root servers rented at a hosting provider. those machines will run tomcat 6 in a cluster. if i will add additional machines later on - it is unlikely that they will be accessible with multicast, because they will be…
Andreas Petersson
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UDP multicast in Windows Azure cloud service

Is there any support for multicast UDP within a Windows Azure cloud service? I've set up internal endpoints for the UDP protocol in my roles, but my guess is that they're only opened for the IP addresses assigned to the web/worker roles in my cloud…
Scott
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Link-scope IPv6 Multicast packets suddenly not routable on a MacBook Pro?

This is a slightly obscure question, but I'm stumped and I thought maybe somebody out there might have more of a clue on the issue. My co-worker has been successfully running an in-house application that uses IPv6 multicasting on his MacBook Pro for…
Jeremy Friesner
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Reliable Multicast over local network

I am implementing a messaging system using C++ and Qt. After much thought, I have determined that multicasting or a multicast-style technique will work best to solve my problem. However, I have learned about UDP's unreliability and believe it to be…
Nathan Moos
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Can Android's MulticastLock be used to monitor 802.11 Probe Requests from other devices?

I am a little confused about Android's ability to receive multicast packets using the WifiManager.MulticastLock. From the documentation: Class Overview Allows an application to receive Wifi Multicast packets. Normally the Wifi stack filters out…
Bryce Thomas
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Applications receiving unwanted multicast traffic

I have the following scenario; the host HostRec: 1) The NIC bond0 of the host has joined the multicast groups multicast1 and multicast2 – because an application has requested this. 2) I start a multicast listening application on the same host…
sommario
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Is there a way to allow multiple programs to subscribe to the same multicast group on windows?

I have two applications that need to subscribe to the same multicast group / port combination. Currently, the only way I can handle this is by building a proxy application that subscribes to the multicast group and forwards the received traffic to…
ConditionRacer
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Multicast socket.close takes 3 minutes with TTL>1

On certain Windows machines, I'm seeing a multicast socket.close call take ~3 minutes. This is reproducible in both Java and .NET across various different kinds of NICs and Windows flavors. It's not reproducible on most machines, but the ones that…
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How to respond to UDP Multicast from UDPClient

I want to preface this by saying my understanding of UDP Broadcasting and Multicasting is very limited. This is my first project working on this. I have a C# desktop client running on a machine and a Windows phone 7 app. The WP7 app is supposed to…
ProgrammerAl
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udp multicast ports in .net code

it only works when I use the same port(9050 or some other) in both send and receive, then how can I receive the multicast in more than one client at the same time on the same computer? that creates a socket error of using the same port more than…
user494461
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Multicasting in android

We have enabled multicast streaming in one of our machines using VLC server. We use the following URL for streaming the multicast data. rtp://239.1.2.11:5004 & udp://239.1.2.11:1234 But when we pass these links to the VideoView or mediaplayer in…
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