uproxy-tcp-floodserver

A TCP server that floods the client with random data. Useful for testing TCP clients.

Build it with ./build.sh and see the options for running it with ./server -h.

The buffer size controls how large the buffer given to write(2) is. If you see (dt = 1.00) very evenly, and wonder if you could get a higher transfer rate, try a larger buffer size. If your variance in transfer rate is too high, then try a smaller one. The default size is reasonable. The max is 1 Gb.

Example usage

Start the server:

  $ ./server -r 100000 -X 1000000000 -p 1227  
  Transmitting at a maximum rate of 100,000 bytes/sec.
  Transmitting a max of 1,000,000,000 bytes before auto-closing socket.
  Reading random data into I/O buffer of 4,096 bytes...done
  Listening to port 1227

And then run:

  $ nc localhost 1224 >/dev/null

To connect to the server. It will show you your transmision rate. It'll auto-terminate after sending a gigabyte over (as specified by the -X flag above). If you don't use the -r limit, you can see how fast your machine is!

Example with a proxy

If you have a proxy on localhost:9999, you can invoke ./server as described above, and then use the client-on-proxy.sh script to connect to it over at proxy.

  $ ./client-on-proxy.sh 1227

Language and format setup

For the commas in numbers, set LANG to something reasonable, like:

  $ export LANG=en_US.UTF-8