def __init__(self, msgSocket=None, sourcePort=soscoap.COAP_PORT, dest=None):
'''Client initialization, espeically for networking.
:param msgSocket: MessageSocket Pass in only for unit testing
:param sourcePort: int Port for source socket
:param dest: tuple 2-tuple (string,int) for destination host address
and port
'''
destTuple = None
if dest:
info = socket.getaddrinfo(dest[0], dest[1], socket.AF_INET6,
socket.SOCK_DGRAM)
log.debug('getaddrinfo: {0}'.format(info))
# Assume we want the first 5-tuple entry returned
destTuple = info[0][4]
if msgSocket:
self._msgSocket = msgSocket
else:
self._msgSocket = MessageSocket(localPort=sourcePort, remote=destTuple)
self._msgSocket.registerForReceive(self._handleMessage)
# A random start is recommended in Sec. 4.4.
self._nextMessageId = random.randint(0, 0xFFFF)
class CoapClient(object):
'''Client for CoAP requests. Like a CoAP server, binds to a socket, usually
on the standard CoAP port. However, only accepts incoming responses when
there is an outstanding request.
Usage:
#. cc = CoapClient() -- Create instance, using the standard CoAP port.
#. cc.start() -- Start networking.
*. ... -- Send messages (TBD)
*. cc.close() -- Cleanup
Attributes:
:_msgSocket: MessageSocket to send/receive messages
:_nextMessageId: Next sequential value for a new Message ID
.. automethod:: soscoap.server.CoapClient.__init__
'''
def __init__(self, msgSocket=None, sourcePort=soscoap.COAP_PORT, dest=None):
'''Client initialization, espeically for networking.
:param msgSocket: MessageSocket Pass in only for unit testing
:param sourcePort: int Port for source socket
:param dest: tuple 2-tuple (string,int) for destination host address
and port
'''
destTuple = None
if dest:
info = socket.getaddrinfo(dest[0], dest[1], socket.AF_INET6,
socket.SOCK_DGRAM)
log.debug('getaddrinfo: {0}'.format(info))
# Assume we want the first 5-tuple entry returned
destTuple = info[0][4]
if msgSocket:
self._msgSocket = msgSocket
else:
self._msgSocket = MessageSocket(localPort=sourcePort, remote=destTuple)
self._msgSocket.registerForReceive(self._handleMessage)
# A random start is recommended in Sec. 4.4.
self._nextMessageId = random.randint(0, 0xFFFF)
def close(self):
'''Releases system resources'''
self._msgSocket.close()
def send(self, message):
'''Send a message'''
self._msgSocket.send(message)
def _handleMessage(self, message):
'''Accepts/reads response, and ignores a request'''
try:
log.debug('Handling message for code class: {0}'.format(message.codeClass))
except:
log.exception('Error handling message')
def _popMessageId(self):
'''Returns the next sequential message ID, and increments'''
nextid = self._nextMessageId
self._nextMessageId = (self._nextMessageId+1 if self._nextMessageId < 0xFFFF
else 1)
return nextid
def start(self):
'''Start networking, with a one second timeout so client doesn't wait
to send.'''
log.info('Starting asyncore loop')
asyncore.loop(1)
