import socket


HOST = "0.0.0.0"
PORT = 10001


def process_message(message: str) -> str:
    return f"UDP server received: {message[::-1]}"


server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
server.bind((HOST, PORT))

print(f"UDP server started on port {PORT}")
print("Send EXIT from client to stop the server")

while True:
    data, addr = server.recvfrom(1024)
    message = data.decode("utf-8")
    print(f"Message from {addr}: {message}")

    response = process_message(message)
    server.sendto(response.encode("utf-8"), addr)

    if message.strip().upper() == "EXIT":
        print("UDP server stopped")
        break

server.close()