Thread: Simulate Latency

Hi guys,

Is it possible with Java to delay packets?

Basically what I want to do is add X ms to every packet going out from a computer to simulate latency, eventually I would add in packet loss etc, but for now, my main concern is just adding delay to packets to increase ping.

I've read from a few different forums where people have asked something similar, and people have said it's not possible. If so, why is it not possible?

Thanks

add X ms to every packet going out from a computer to simulate latency

You could use Thread.sleep(X) to delay the sending of a packet.

Hi Norm,

Thanks for the reply.

I probably should have included that I am completely new to networking in Java, in fact I'm rather new to Java, but want to jump straight in.

Basically I am doing something to do with lag compensation for gaming (basically a report on the effects of it, and how people with good connections are getting penalised), basically I bridge my console connection to my computer, and then I can see all network traffic (via wireshark), I then want to add latency to the packets. I can already do this via Linux, by using netem, however I wanted to improve my Java knowledge and get into a little bit of networking, so want to attempt to do something similar just for the sake of learning.

Is this still possible? If so, where do I start. Am not after any code (samples would help though ), just somewhere to start reading (maybe even a good book?).

Sorry if I wasn't clear in my first post.

Thanks

My suggestion assumed that you had a java program that was sending packets.
Your setup doesn't sound like that is what you are doing. I don't see where you have any java code in what you are doing.

Yeah as you are more concerned with Networking, so i will recommend you to seeTrail: Custom Networking (The Java™ Tutorials)

Originally Posted by Norm

My suggestion assumed that you had a java program that was sending packets.
Your setup doesn't sound like that is what you are doing. I don't see where you have any java code in what you are doing.

I think basically I want to do something like Wireshark (wireshark.org), but not so complicated in the sense of analysing the packets. I want to write a Java app to capture all packets, add a delay, then let the packets go on their way.

There is software out there that already does it, but want to try writing my own. Am unsure how they are doing it.

Originally Posted by Mr.777

Yeah as you are more concerned with Networking, so i will recommend you to seeTrail: Custom Networking (The Java™ Tutorials)

Thanks, will have a read of that