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"""
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mbed SDK
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Copyright (c) 2011-2013 ARM Limited
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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import sys
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import socket
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from sys import stdout
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from SocketServer import BaseRequestHandler, UDPServer
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class UDPEchoClient_Handler(BaseRequestHandler):
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def handle(self):
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""" One handle per connection
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"""
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data, socket = self.request
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socket.sendto(data, self.client_address)
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if '{{end}}' in data:
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print
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print data
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else:
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sys.stdout.write('.')
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stdout.flush()
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class UDPEchoClientTest():
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def send_server_ip_port(self, selftest, ip_address, port_no):
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c = selftest.mbed.serial_readline() # 'UDPCllient waiting for server IP and port...'
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if c is None:
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selftest.print_result(selftest.RESULT_IO_SERIAL)
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return
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selftest.notify(c.strip())
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selftest.notify("HOST: Sending server IP Address to target...")
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connection_str = ip_address + ":" + str(port_no) + "\n"
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selftest.mbed.serial_write(connection_str)
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c = selftest.mbed.serial_readline() # 'UDPCllient waiting for server IP and port...'
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if c is None:
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self.print_result(selftest.RESULT_IO_SERIAL)
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return
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selftest.notify(c.strip())
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return selftest.RESULT_PASSIVE
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def test(self, selftest):
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# We need to discover SERVEP_IP and set up SERVER_PORT
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# Note: Port 7 is Echo Protocol:
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#
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# Port number rationale:
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#
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# The Echo Protocol is a service in the Internet Protocol Suite defined
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# in RFC 862. It was originally proposed for testing and measurement
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# of round-trip times[citation needed] in IP networks.
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#
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# A host may connect to a server that supports the Echo Protocol using
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# the Transmission Control Protocol (TCP) or the User Datagram Protocol
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# (UDP) on the well-known port number 7. The server sends back an
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# identical copy of the data it received.
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SERVER_IP = str(socket.gethostbyname(socket.getfqdn()))
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SERVER_PORT = 7
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# Returning none will suppress host test from printing success code
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server = UDPServer((SERVER_IP, SERVER_PORT), UDPEchoClient_Handler)
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print "HOST: Listening for UDP connections..."
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self.send_server_ip_port(selftest, SERVER_IP, SERVER_PORT)
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server.serve_forever()
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