Update tcp-client.py and udp-client.py

blackhat-python3/chapter2 - Network Basics/UDP-Client.py

@@ -1,14 +1,18 @@
+# Import the socket module
 import socket
 
+# Define the target host and port
 target_host = "127.0.0.1"
 target_port = 80
 
-# create a socket object
+# Create a socket object
 client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
 
-# send some data
+# Send some data to the target host and port
 client.sendto("AAABBBCCC".encode(), (target_host, target_port))
 
-# receive some data
+# Receive some data from the target host
 data, addr = client.recvfrom(4096)
+
+# Print the received data after decoding it from bytes to string
 print(data.decode())

blackhat-python3/chapter2 - Network Basics/tcp-client.py

@@ -1,19 +1,24 @@
+# Import the socket module
 import socket
 
+# Define the target host and port
 target_host = "www.google.com"
 target_port = 80
 
-# create a socket object
+# Create a socket object
 client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 
-# connect the client
+# Connect the client to the target host and port
 client.connect((target_host, target_port))
 
-# send some data
+# Prepare the HTTP GET request
 request = "GET / HTTP/1.1\r\nHost: {}\r\n\r\n".format(target_host)
+
+# Send the request to the server after encoding it as bytes
 client.send(request.encode())
 
-# receive some data
+# Receive the response from the server
 response = client.recv(4096)
 
+# Print the response after decoding it from bytes to a string
 print(response.decode())

blackhat-python3/chapter2 - Network Basics/tcp-server.py

@@ -1,39 +1,39 @@
+# This is a TCP server implementation
+
 import socket
 import threading
 
+# Set the IP address and port to listen on
 bind_ip = "0.0.0.0"
 bind_port = 9999
 
+# Create a socket object
 server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+
+# Bind the socket to the IP address and port
 server.bind((bind_ip, bind_port))
+
+# Start listening for incoming connections
 server.listen(5)
+
+# Print a message indicating the server is listening
 print("[*] Listening on %s:%d" % (bind_ip, bind_port))
 
-# this is our client-handling thread
+# Define the function to handle each client connection
 def handle_client(client_socket):
-    # print out what the client sends
+    # Receive data from the client
     request = client_socket.recv(1024)
     print("[*] Received: %s" % request.decode())
-    # send back a packet
+
+    # Send a response back to the client
     client_socket.send("ACK!".encode())
     client_socket.close()
 
+# Accept and handle incoming connections
 while True:
     client, addr = server.accept()
     print("[*] Accepted connection from: %s:%d" % (addr[0], addr[1]))
-    # spin up our client thread to handle incoming data
+
+    # Start a new thread to handle the client
     client_handler = threading.Thread(target=handle_client, args=(client,))
     client_handler.start()
-
-"""
-
-
-Certainly! The provided Python code sets up a TCP server that listens on IP address "0.0.0.0" and port 9999. It creates a socket object, binds it to the specified IP address and port, and starts listening for incoming connections.
-
-When a client connects to the server, a separate thread is created to handle the client. The handle_client function is responsible for receiving data from the client, printing it out, and sending an "ACK!" message back to the client. The received data is printed, and the "ACK!" message is sent as a response. Finally, the client socket is closed.
-
-The server continuously listens for incoming connections in a loop. Each time a connection is accepted, it prints the client's IP address and port, and spawns a new thread to handle the client. This allows the server to handle multiple client connections concurrently.
-
-Overall, the code demonstrates a basic TCP server implementation using socket programming in Python, utilizing threading to handle multiple client connections simultaneously.
-
-""""