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PratikzzzPratikzzz
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Added pychat program
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‎pychat/Readme.txt

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Hello everyone to get started with pychat you just need your IP address and any port number ranging from 1-65535
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but my recommendations would be take any port number above 1000 as below are already assigned to other services.
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This client,server script can work on both remote and local machines.
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For Eg:- IP:192.168.0.108(Local IP), 24.18.46.234(Remote IP)
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Port:6666,8080,7641
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1. For Windows
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ipconfig /all
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2. For Linux/MacOS
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ifconfig
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1. First start the server script and enter the IP address and port number
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python server.py
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[+] Enter server address: 192.168.108
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[+] Enter server port: 8888
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2. Then start the pychat script
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python pychat.py
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[+] Enter server address: 192.168.108
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[+] Enter server port: 8888

‎pychat/pychat.py

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#! /usr/bin/python3
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"""
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__Description__='This is a simple script which establishes socket connection
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between server and client using TCP protocol and python socket
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library.'
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"""
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from socket import *
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#Function: To display the banner
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def Banner():
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print("""
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________ ______ _____
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___ __ \____ __________ /_______ __ /_
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__ /_/ /_ / / / ___/_ __ \ __ `/ __/
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_ ____/_ /_/ // /__ _ / / / /_/ // /_
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/_/ _\__, / \___/ /_/ /_/\__,_/ \__/
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/____/ Version 1.0
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""")
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#Function: Asking user for server address and port
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def User_Input():
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#Function: For validating IP address
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def Valid_IP():
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while True:
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try:
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host = input("[+] Enter server address: ")
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valid_ip = host.split('.')
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for items in valid_ip:
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if(len(valid_ip) == 4 and int(items)):
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return host
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else:
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print("[+] Enter a valid IP")
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continue
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except ValueError:
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print("[+] Enter a valid IP")
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continue
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#Function: For validating port number
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def Valid_Port():
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while True:
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try:
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port = int(input("[+] Enter server port: "))
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if(port > 0 and port < 65535):
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pass
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else:
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print("[+] Port must be 0-65535")
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continue
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except ValueError:
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print("[+] Enter a valid port number")
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continue
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else:
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break
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return port
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host, port = Valid_IP(), Valid_Port()
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return host, port
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#Function: To exit or continue the connection
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def Client_Exit():
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while True:
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user_value = input("[+] Want to send more messages? (y/n): ")
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if (user_value == 'y' or user_value == 'n'):
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return user_value
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else:
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print("[+] Wrong input")
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continue
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#Function: To setup and communicate with the server
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def Client_Setup():
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#Printing the banner
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Banner()
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#Setting the server address and port
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server_address, server_port = User_Input()
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#Initializing a new socket connection
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my_socket = socket(AF_INET, SOCK_STREAM)
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print("[+] Establishing connection")
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#Connecting the socket to specified host and port
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my_socket.connect((server_address, server_port))
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print("[+] Connection established")
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#Infinite loop for sending messages to server
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while True:
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message = input("[+] Message to send: ")
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#uncomment the below line if you're using ncat/netcat for better
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#terminal readability
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#message = message + "\n"
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my_socket.send(message.encode('utf-8'))
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user_value = Client_Exit()
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if (user_value == 'n'):
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print("[+] Closing transport")
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my_socket.close()
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break
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else:
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continue
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try:
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Client_Setup()
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except ConnectionRefusedError:
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print("[+] Connection refused")
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except TimeoutError:
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print("[+] Connection timeout")
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except KeyboardInterrupt:
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print("[+] Closing transport")
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except OSError:
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print("[+] Invalid host")

‎pychat/server.py

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#! /usr/bin/python3
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"""
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__Description__='This is a simple script which establishes socket connection
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between server and client using TCP protocol and python socket
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library.'
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"""
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from socket import *
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#Function: To display the banner
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def Banner():
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print("""
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__ ___ ___ _ _ ___ ___
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/' _/| __| _ \| \ / || __| _ \ \t
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`._`.| _|| v /`\ V /'| _|| v /
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|___/|___|_|_\ \_/ |___|_|_\ Version 1.0
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""")
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#Function: Asking user for server setup
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def User_Input():
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#Function: For validating IP address
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def Valid_IP():
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while True:
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try:
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host = input("[+] Enter server address: ")
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valid_ip = host.split('.')
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for items in valid_ip:
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if(len(valid_ip) == 4 and int(items)):
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return host
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else:
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print("[+] Enter a valid IP")
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continue
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except ValueError:
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print("[+] Enter a valid IP")
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continue
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#Function: For validating port number
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def Valid_Port():
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while True:
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try:
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port = int(input("[+] Enter server port: "))
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if(port > 0 and port < 65535):
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pass
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else:
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print("[+] Port must be 0-65535")
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continue
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except ValueError:
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print("[+] Enter a valid port number")
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continue
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else:
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break
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return port
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host, port = Valid_IP(), Valid_Port()
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return host, port
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#Function: To setup and communicate with the client
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def Server_Setup():
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#Printing the banner
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Banner()
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#Setting server address and port
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server_address, server_port = User_Input()
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#Initializing a new socket connection
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my_socket = socket(AF_INET, SOCK_STREAM)
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#Setting socket for reuse
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my_socket.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
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#Binding the new socket to specified host and port
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my_socket.bind((server_address, server_port))
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#Listening for number of connections simultaneously
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my_socket.listen(3)
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print("[+] Server started! Waiting for connections...")
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#Accepting the connection from client
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connection, address = my_socket.accept()
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print("[+] Client connected with address: ", address)
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#Infinite loop for receiving messages from client
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while True:
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# 1024 is the buffer size
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data = connection.recv(1024)
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if not data:
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print("[+] Closing transport")
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break
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else:
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print("[+] Client:", data.decode('utf-8'))
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connection.close()
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try:
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Server_Setup()
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except KeyboardInterrupt:
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print("[+] Closing transport")
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except OSError:
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print("[+] Invalid host")

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