A Network Packet Monitoring Tool - Packet Sniffing using Python

Running the Program

To run the program, follow these steps from your terminal:

1. Enter Root Mode:

   • Switch to root mode by running:

     $ sudo su -
     

   • Then enter your password.

2. Change Directory:

   • Navigate to the directory where the program files are stored:

     $ cd ~/command-line-packet-sniffer
     

3. Run the Python File:

   • Execute the main program file:

     $ python main.py
     

4. Choose an Option:

   • After running the script, you will see a menu of options:

     Options:
     1. Capture packets and analyze it
     

   • Selecting option '1' will prompt you to enter the number of packets you want to capture or analyze. The capturing will then start.
   • If you choose option '1', it will provide another list of options after capturing data:

     Options:
     1. Print details of packets
     0. Exit
     

     • Selecting option '1' here will present further choices:

       Options:
       1. Print details of all packets
       2. Print details of a specific packet
       3. Print details of all packets in range
       0. Exit from option '1'
       

Program Features:

1. It can handle this protocols:
	Data Link Layer:	Ethernet
	Network Layer:		IPV4		[It can identify all the protocols given here but it can only give information of IPV4 protocol]
	Transport Layer:	TCP,UDP,ICMP	[It can identify all the protocols given here but it can only give information of TCP, UDP, ICMP protocol]
2. It can print almost all the information of an packet.

Code properties:

1. It contains a11 source files.
2. Python File:
	main.py 	: It contains the main function where the program starts from.
	sniffer.py 	: It contains PacketSniffer (Captures packets) and Packet (Every packet works as Packet object instances) object class.
	messages.py 	: It contains MessageBox object class which handles all display messages related tasks.
	converter.py 	: It contains commonly used basic function tools
	data_link.py 	: It contains Data Link Layer protocol object classes (Ethernet)
	network.py 	: It contains Network Layer protocol object classes (IPv4)
	transport.py 	: It contains Transport Layer protocol object classes (TCP, UDP, ICMP)
3. Executable File:
	main.py

Dependencies

1. Operating System : Ubuntu, Linux
2. Platform : Python
3. Libraries/Modules: socket, sys, struct		[all of these are built in modules of python] 
4. Internet connection or Lan connection.