Use python to create TCP and UDP connections

New-TCPClient.py

import socket
target_host = "www.example.com"
target_port = 80

# create a socket object
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# connect the client
client.connect((target_host,target_port))

# send some data
client.send(b"GET / HTTP/1.1\r\nHost: example.com\r\n\r\n")

# receive some data
response = client.recv(4096)

print(response.decode())
client.close()

# source:
# Seitz, J., Arnold, T., & Miller, C. A. (2021). Black Hat Python: Python programming for hackers and Pentesters. No Starch Press. 

New-TCPServer

import socket
import threading

IP = '0.0.0.0'
PORT = 9998

def main():
    server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server.bind((IP, PORT))
    # start listening with a maximum backlog of connections set to 5
    server.listen(5)
    print(f'[*] Listening on {IP}:{PORT}')

    while True:
        client, address = server.accept()
        print(f'[*] Accepted connection from {address[0]}:{address[1]}')
        client_handler = threading.Thread(target=handle_client, args=(client,))
        client_handler.start()

def handle_client(client_socket):
    with client_socket as sock:
        request = sock.recv(1024)
        print(f'[*] Received: {request.decode("utf-8")}')
        sock.send(b'ACK')

if __name__ == '__main__':
    main()

# source:
# Seitz, J., Arnold, T., & Miller, C. A. (2021). Black Hat Python: Python programming for hackers and Pentesters. No Starch Press. 

New-UDPClient.py

import socket

target_host = "127.0.0.1"
target_port = 9997

# create a socket object
client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

# send some data
client.sendto(b"Datadatadata",(target_host,target_port))

# receive some data
data, addr = client.recvfrom(4096)

print(data.decode())
client.close()

# source:
# Seitz, J., Arnold, T., & Miller, C. A. (2021). Black Hat Python: Python programming for hackers and Pentesters. No Starch Press.