Stack Overflow
Stack Overflow

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.

1621 questions
10
votes
1 answer

Multicast Join on Linux and IGMPv3

We've run into a thorny problem. We are writing a c++ program that receives multicast UDP traffic. We're in the process of moving our applications to a different network environment and our operations team has requested that we support IGMPv3…
terson
  • 1,307
  • 1
  • 9
  • 10
10
votes
2 answers

MulticastSocket constructors and binding to port or SocketAddress

I may have a fundamental misunderstanding of the term binding here but I am confused about the usage of the MulticastSocket and it's constructors. They no not do what I understand they should do should do so any who can help me clear my…
D-Dᴙum
  • 7,689
  • 8
  • 58
  • 97
10
votes
3 answers

Creating a class for an interface at runtime, in C#

I'm looking at taking a set of objects, let's say there's 3 objects alive at the moment, which all implement a common interface, and then wrap those objects inside a fourth object, also implementing the same interface. The fourth object's…
Lasse V. Karlsen
  • 380,855
  • 102
  • 628
  • 825
9
votes
3 answers

Loopback in multicast

This question is about sending and receiving multicasts inside the same host, while simultaneously sending it to other hosts. Even after hours of googling, I have not been able to sort out, how multicast datagrams are routed within the same…
El Sampsa
  • 1,673
  • 3
  • 17
  • 33
9
votes
2 answers

IPV6 link local multicasting

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…
Goz
  • 61,365
  • 24
  • 124
  • 204
9
votes
6 answers

Is 1-to-n multicast on the open internet reliable?

I'm a newbie at networking. I understand the concept of multicast, but was wondering if it's reliable on the open/public internet? It seems like sort of an edge case that different backbones or ISPs might intentionally break to reduce router load…
Jeremy Dunck
  • 5,724
  • 6
  • 25
  • 30
9
votes
2 answers

UDP broadcast/multicast vs unicast behaviour (dropped packets)

I have an embedded device (source) which is sending out a stream of (audio) data in chunks of 20 ms (= about 330 bytes) by means of a UDP packets. The network volume is thus fairly low at about 16kBps (practically somewhat more due to UDP/IP…
djbuijs
  • 266
  • 1
  • 2
  • 10
9
votes
6 answers

Need microsecond delay in .NET app for throttling UDP multicast transmission rate

I'm writing a UDP multicast client/server pair in C# and I need a delay on the order of 50-100 µsec (microseconds) to throttle the server transmission rate. This helps to avoid significant packet loss and also helps to keep from overloading the…
James Dunne
  • 3,607
  • 3
  • 24
  • 29
9
votes
1 answer

IPPROTO_RM blocks during accept call

This question is similar to https://stackoverflow.com/questions/11650328/using-reliable-multicast-pragmatic-general-multicast-not-returning-from-accept, but my code is slightly different from its, so it may result in a different answer. I am…
Anthony
  • 12,177
  • 9
  • 69
  • 105
9
votes
2 answers

boost::asio multicast example

I've just began reading information about multicast transfers using boost::asio and I'm somewhat puzzled by the following: Why do we need a "listening address" in the following boost::asio example? What's the point of that? Why would one choose…
deinocheirus
  • 1,833
  • 5
  • 26
  • 44
9
votes
1 answer

How can chrome.socket be used for broadcasting or multicasting?

I want to create a Chrome Packaged App used for LAN only, where one instance serves as a server (session host) and other instances must discover the server and join the session. Can this be achieved with chrome.socket? I have set up the server like…
hlidka
  • 2,086
  • 1
  • 15
  • 14
9
votes
4 answers

UDP Server Discovery - Should clients send multicasts to find server or should server send regular beacon?

I have clients that need to all connect to a single server process. I am using UDP discovery for the clients to find the server. I have the client and server exchange IP address and port number, so that a TCP/IP connection can be established after…
Elan
  • 6,084
  • 12
  • 64
  • 84
9
votes
1 answer

What is the difference between IPV6_ADD_MEMBERSHIP and IPV6_JOIN_GROUP?

I notice that most OSes that define IPv6 multicast define two sets of socket options; IPV6_ADD_MEMBERSHIP/IPV6_DROP_MEMBERSHIP and IPV6_JOIN_GROUP/IPV6_LEAVE_GROUP. Whenever I find them, they are documented as synonyms, taking the same option value.…
LeoNerd
  • 8,344
  • 1
  • 29
  • 36
8
votes
1 answer

How to specify the multicast SEND interface in Python?

There is quite a few examples to RECEIVE multicast messages with a spcific network interface (NIC, e.g. eth0, 127.0.0.1 etc). However, there is few discussion/examples about how to SEND multicast (UDP) messages to a specific interface, e.g. local…
user1268888
  • 83
  • 1
  • 4
8
votes
2 answers

Do I need a PORT when joining a multicast group or just the IP?

I would like to learn that once and for all. What is the procedure to connect a multicast socket? I know you have to bind to a local interface (do you need IP and port for that?) then I know you have to join a group (do you need IP:PORT for the…
chrisapotek
  • 6,007
  • 14
  • 51
  • 85
1 2 3
…
99 100