Attachment 'udp_chat.py'

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   1 #!/usr/bin/env python
   2 import socket
   3 from threading import Thread
   4 import time
   5 
   6 global doexit,sock
   7 doexit=False
   8 sock=None
   9 
  10 def receive():
  11 	"""This will listen for messages until the global 'doexit' is set"""
  12 	global doexit,sock
  13 
  14 	sock=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)	# create socket
  15 	sock.bind(("",40000))					# attach to port 40000
  16 	sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)	# we are going to broadcast to everyone
  17 	while True:
  18 		if doexit : break
  19 		msg=sock.recvfrom(1000)				# receive up to 1000 characters
  20 		print msg[1][0],": ",msg[0]
  21 
  22 # This starts a separate thread for listening for messages
  23 thread=Thread(target=receive)
  24 thread.start()
  25 
  26 # sender
  27 
  28 while True:
  29 	txt=raw_input()					# get the message from the user
  30 	sock.sendto(txt,("<broadcast>",40000))		# broadcast on port 40000
  31 	if txt=="quit" or txt=="exit" : break		# if the user wants to quit
  32 
  33 doexit=True
  34 time.sleep(1)

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