'''
This is a testing program
the program is used to start server
'''
import socket
import sys
def start_tcp_server(ip, port):
  #create socket
  sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  server_address = (ip, port)
  #bind port
  print 'starting listen on ip %s, port %s'%server_address
  sock.bind(server_address)
  #starting listening, allow only one connection
  try:
    sock.listen(1)
  except socket.error, e:
    print "fail to listen on port %s"%e
    sys.exit(1)
  while True:
    print "waiting for connection"
    client,addr = sock.accept()
    print 'having a connection'
    client.close()
if __name__ == '__main__':
  start_tcp_server('10.20.0.20', 12345)

ip = socket.gethostbyname(socket.gethostname())

# -*- coding: utf-8 -*-
'''
This is a testing program
the program is used to test socket client
'''
import socket
import sys
def start_tcp_client(ip, port):
  #server port and ip
  server_ip = ip
  servr_port = port
  tcp_client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  try:
    tcp_client.connect((server_ip, server_port))
  except socket.error:
    print 'fail to setup socket connection'
  tcp_client.close()