#!/usr/bin/python

############################################################################
# Server side: open a TCP/IP socket on a port, listen for a message from
# a client, and send an echo reply; this is a simple one-shot listen/reply
# conversation per client, but it goes into an infinite loop to listen for
# more clients as long as this server script runs; the client may run on
# a remote machine, or on same computer if it uses 'localhost' for server
############################################################################

from socket import * # get socket constructor and constants

myHost = 'silo.cs.indiana.edu' # server machine, '' means local host
myPort = 15854 # listen on a non-reserved port number

sockobj = socket(AF_INET, SOCK_STREAM) # make a TCP socket object

sockobj.bind((myHost, myPort)) # bind it to server port number
sockobj.listen(3) # listen, allow 3 pending connects

while True: # listen until process killed

  print "I am waiting now for someone to call..."
  connection, address = sockobj.accept( ) # wait for next client connect

  print 'Server connected by', address # connection is a new socket

  while True:
    data = connection.recv(1024) # read next line on client socket
    print "sending ", data
    if not data: break # send a reply line to the client
    connection.send('Echo=>' + data) # until eof when socket closed

  connection.close( )