Socket Programming in C

By Ayush Sharma (2019101004)

Overview

This work deals with basic socket programming context. This root directory contains two main directory one for SERVER node and other for CLIENT node. Overall working is:

• The client will create/request a connection to the server
• After successfull connection client can send either get <filenames> or exit REQUEST
• get <filenames> will download files to directory CLIENT/downloads from SERVER/downloadable_files directory
• exit will close the connection
• Progress will be printed while downloading the file on both server and client terminals.
• Connection is basically made of type TCP/IPV4
• Error handling such as requesting missing files has been handled appropriately.

Making Code Run

Follow the steps to run the code:

• Open 2 terminal windows

• Open SERVER directory in one and CLIENT in other.

• In SERVER directory run the following commands: gcc server.c -o server then clear;./server You will get output on terminal: server setup complete: waiting for connections...

• In CLIENT directory run the following commands: gcc client.c -o client then clear;./client You will get a red color prompt.

• Before running any command place some dummy files of your choice in directory SERVER/downloadable_files. I have already put a dummy file. Check it out.

• Your Client is now connected to the Server and go download the available files...

Libraries Used

• #include<stdio.h>
• #include<stdlib.h>
• #include<string.h>
• #include<sys/socket.h>
• #include<sys/stat.h>
• #include<netinet/in.h>
• #include<unistd.h>
• #include<arpa/inet.h> // only in client.c
• #include<fcntl.h>