shamohamin / Datalink-Protocol

Reliable Data Transfer Protocols (go-back-n, stop-and-wait)

DATA-LINK-PROTOCOL

This Project Is a Simple Implementation Of HDLC And Go-Back-ARQ Protocol, Which Is Written In Golang Using TCP Socket.

Frame Structure

• structure:
  • Information: which hold information of frames (it depeneds on frame length)
  • StartFlag: for distinguishing the start of frame (1 byte)
  • EndFlag: for distinguishing the end of frame (1 byte)
  • Control: for holding the sequence number and address (2 byte)

Frame Types

• types:
  • FrameData: for sending information frame
  • FrameSupervised: for sending acknowledge frames
  • FrameReject: for sending rejected acknowledge frames
  • FrameDisconnect: for disconnecting the connection

Start

    (running server)
    cd server
        go run server.go pass window size
    
    (running client)
    cd client
        go run client.go pass frame length
    
    (running with python)
    python3 -m venv env
        source env/bin/activate 
            (env) python runner.py

Screenshots

• Different Frame Length

• Performance Different Windows Sizes