Base64-Encoding-based-Client-Server-Communication-System

####### BASE64 encoding system using Client-Server socket programming #######

• server can handle many clients simultaneously and while communicating it uses base64 encoding.
• client server communication work on TCP sockets.
• Initially server will be waiting for the client to create TCP connection.
• Then client will communicate with the server on already known port number.
• After succesfull connection establishment, client will ask input message from user and and client encodes this message and send to the server.
• After recieving the message , server decodes the message and prints the original message and decoded message. and server sends an ACK message to the client.
• Client and server remains in the loops to continue the endless communication, untill the user want to terminate the connection.
• If client wants to close the connection, client send the type 3 (close connection) message to the server.
• After recieving close connection message from client, TCP connection is closed and all the socket resources are released successfully.

HOW TO EXECUTE THE PROGRAM

This module consists of 4 file-:

• client.c //this file includes the encode and decode module.
• server.c //this file also includes the encode and decode module.
• encode.c //Encoding the text message to base64 encoding
• decode.c //Decoding the base64 encoded message.

For compilation of the client.c:

• **Command :- ** gcc -o client client.c -lm

For compilation of the server.c:

• Command :- gcc -o server server.c -lm

To start the server :

      ./server 9090

To start the client :

      ./client 127.0.0.1 9090

To start the another client :

      ./client 127.0.0.1 9090

Prototypes for Client and Server :

    > Client: _<executable code><Server IP Address><Server Port number>_
    > Server: _<executable code><Server Port number>_