text: """
  mbed SDK
  Copyright (c) 2011-2013 ARM Limited
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  """
  
  
  import re
  import sys
  import uuid
  from sys import stdout
  from time import time
  from host_test import DefaultTest
  from socket import socket, AF_INET, SOCK_DGRAM
  
  
  class UDPEchoServerTest(DefaultTest):
      ECHO_SERVER_ADDRESS = ""
      ECHO_PORT = 0
      s = None # Socket
  
      PATTERN_SERVER_IP = "Server IP Address is (\d+).(\d+).(\d+).(\d+):(\d+)"
      re_detect_server_ip = re.compile(PATTERN_SERVER_IP)
  
      def run(self):
          result = True
          serial_ip_msg = self.mbed.serial_readline()
          if serial_ip_msg is None:
              self.print_result("ioerr_serial")
              return
          stdout.write(serial_ip_msg)
          stdout.flush()
          # Searching for IP address and port prompted by server
          m = self.re_detect_server_ip.search(serial_ip_msg)
          if m and len(m.groups()):
              self.ECHO_SERVER_ADDRESS = ".".join(m.groups()[:4])
              self.ECHO_PORT = int(m.groups()[4]) # must be integer for socket.connect method
              print "HOST: UDP Server found at: " + self.ECHO_SERVER_ADDRESS + ":" + str(self.ECHO_PORT)
              stdout.flush()
  
              # We assume this test fails so can't send 'error' message to server
              try:
                  self.s = socket(AF_INET, SOCK_DGRAM)
              except Exception, e:
                  self.s = None
                  print "HOST: Error: %s" % e
                  self.print_result('error')
                  exit(-1)
  
              for i in range(0, 100):
                  TEST_STRING = str(uuid.uuid4())
                  self.s.sendto(TEST_STRING, (self.ECHO_SERVER_ADDRESS, self.ECHO_PORT))
                  data = self.s.recv(len(TEST_STRING))
                  received_str = repr(data)[1:-1]
                  if TEST_STRING != received_str:
                      result = False
                      break
                  sys.stdout.write('.')
                  stdout.flush()
          else:
              result = False
  
          if self.s is not None:
              self.s.close()
  
          if result:
              self.print_result('success')
          else:
              self.print_result('failure')
  
          # Receiving
          try:
              while True:
                  c = self.mbed.serial_read(512)
                  if c is None:
                      self.print_result("ioerr_serial")
                      break
                  stdout.write(c)
                  stdout.flush()
          except KeyboardInterrupt, _:
              print "\n[CTRL+c] exit"
  
  if __name__ == '__main__':
      UDPEchoServerTest().run()
  