import socket
import threading

bind_ip = "0.0.0.0"
bind_port = 9999

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

server.bind((bind_ip, bind_port))

print(f"[*] Listen on {bind_ip}:{bind_port}")

def handle_client(client_socket):
  request = client_socket.recv(1024)

  print(f"[*] Received: {request}")

  client_socket.send("ACK")

  client_socket.close()

while True:
  client, address = server.accept()

  print(f"[*] Accept connection from {address[0]}:{address[1]}")

  client_handler = threading.Thread(target = handle_client, args = (client, ))
  client_handler.start()
  

[*] Listen on 0.0.0.0:9999
Traceback (most recent call last):
File "main.py", line 23, in
client, address = server.accept()
File "/usr/lib/python3.8/socket.py", line 292, in accept
fd, addr = self._accept()
OSError: [Errno 22] Invalid argument