Go-back-N-ARQ-Protocol

An implementation of the Go Back N protocol, in Python.

Project Description: Please click here

Developers

Manoj Sharan & Anthony Scalabrino

GENERATE FILE TEST FILE

1. Open Terminal on Ubuntu and use this command dd if=/dev/zero of=testfile.txt bs=1 count=0 seek=1195K

2. This will generate a text file with all “0”s written with size 1.1MB (approx..)

RUN PROJECT & MEASURE RESULTS

1. Before executing the program, there are some changes needed to adapt it to your environment. Open “client.py” and navigate to line 10 that has the following line : tempfile = "/temp.txt" . Replace the empty string with a valid full file path. For example, tempfile = "/home/ubuntu/temp.txt". This will be used to create a temp.txt file that will be used by the program.

2. Open Terminal on Ubuntu and use this command python server.py <port> <filename> <loss>

Where, <filename> should be replaced with the desired name of the file to write the received packets into

<loss> should be replaced with the desired probability value for inducing error/ packet loss

<port> should be replaced with the desired port number to run the server on.

3. Open another terminal window on Ubuntu (preferably on a separate machine) and use this command python client.py < IP> <Port > testfile.txt <WS> <MSS>

where, <WS> should be replaced with the desired Window Size

<MSS> should be replaced with the desired Maximum Segment Size

<IP> should be replaced with the desired server IP address/hostname to connect to

<Port> should be replaced with the desired server port number to connect to.

Note: If a different filename is used, change the “testfile.txt” to reflect the new file name.

RESULTS