def _query(self, observeAction):
'''Runs the reader's query
:param observeAction: reg (register), dereg (deregister), or None;
triggers inclusion of Observe option
'''
# create message
msg = CoapMessage(self._hostTuple)
msg.messageType = MessageType.NON
msg.codeClass = CodeClass.Request
msg.codeDetail = RequestCode.GET
msg.messageId = random.randint(0, 65535)
msg.tokenLength = 2
msg.token = (0x35, 0x61)
if self._queryName == 'core':
msg.addOption( CoapOption(OptionType.UriPath, '.well-known') )
msg.addOption( CoapOption(OptionType.UriPath, 'core') )
elif self._queryName == 'stats':
msg.addOption( CoapOption(OptionType.UriPath, 'cli') )
msg.addOption( CoapOption(OptionType.UriPath, 'stats') )
if observeAction == 'reg':
# register
msg.addOption( CoapOption(OptionType.Observe, 0) )
elif observeAction == 'dereg':
# deregister
msg.addOption( CoapOption(OptionType.Observe, 1) )
# send message
log.debug('Sending query')
self._client.send(msg)
def _sendNotifResponse(self, notif, responseType):
'''Sends an empty ACK or RST response to a notification
:param notif: CoapMessage Observe notification from server
'''
msg = CoapMessage(notif.address)
msg.codeClass = CodeClass.Empty
msg.codeDetail = ClientResponseCode.Empty
msg.messageId = notif.messageId
msg.tokenLength = 0
msg.token = None
if responseType == 'reset':
msg.messageType = MessageType.RST
else:
msg.messageType = MessageType.ACK
log.debug('Sending {0} for notification response'.format(responseType))
self._client.send(msg)
def _query(self, observeAction, observePath, tokenText=None):
'''Runs the reader's query.
Uses a randomly generated two byte token, or the provided string encoded
bytes.
:param observeAction: string -- reg (register), dereg (deregister);
triggers inclusion of Observe option
:param observePath: string Path for register/deregister
:param tokenText: string String encoding of token bytes; must by an
even-numbered length of characters like '05'
or '05a6'
'''
# create message
msg = CoapMessage(self._hostTuple)
msg.messageType = MessageType.NON
msg.codeClass = CodeClass.Request
msg.codeDetail = RequestCode.GET
msg.messageId = random.randint(0, 65535)
if observePath == 'core':
msg.addOption(CoapOption(OptionType.UriPath, '.well-known'))
msg.addOption(CoapOption(OptionType.UriPath, 'core'))
elif observePath == 'stats':
msg.addOption(CoapOption(OptionType.UriPath, 'cli'))
msg.addOption(CoapOption(OptionType.UriPath, 'stats'))
elif observePath == 'stats2':
msg.addOption(CoapOption(OptionType.UriPath, 'cli'))
msg.addOption(CoapOption(OptionType.UriPath, 'stats2'))
if observeAction == 'reg':
# register
msg.addOption(CoapOption(OptionType.Observe, 0))
if tokenText:
msg.tokenLength = len(tokenText) / 2
msg.token = bytearray(msg.tokenLength)
for i in range(0, msg.tokenLength):
msg.token[i] = int(tokenText[2 * i:2 * (i + 1)], base=16)
else:
msg.tokenLength = 2
msg.token = bytearray(2)
msg.token[0] = random.randint(0, 255)
msg.token[1] = random.randint(0, 255)
self._registeredPaths[observePath] = msg.token
elif observeAction == 'dereg':
# deregister
msg.addOption(CoapOption(OptionType.Observe, 1))
msg.tokenLength = 2
msg.token = self._registeredPaths[observePath]
# assume deregistration will succeed
del self._registeredPaths[observePath]
# send message
log.debug('Sending query')
self._client.send(msg)
def _createReplyTemplate(self, request, resource):
'''Creates a reply message with common code for any reply
:returns: CoapMessage Created reply
'''
msg = CoapMessage()
msg.address = request.address
msg.tokenLength = request.tokenLength
msg.token = request.token
msg.codeClass = resource.resultClass
msg.codeDetail = resource.resultCode
if request.messageType == MessageType.CON:
msg.messageType = MessageType.ACK
msg.messageId = request.messageId
elif request.messageType == MessageType.NON:
msg.messageType = MessageType.NON
msg.messageId = self._popMessageId()
else:
log.error('Sending Reset due to unexpected messageType: {0}', msg.messageType)
msg.messageType = MessageType.RST
msg.messageId = request.messageId
return msg
def query(self, queryName):
"""Runs a named query"""
# create message
msg = CoapMessage(self._hostTuple)
msg.messageType = MessageType.NON
msg.codeClass = CodeClass.Request
msg.codeDetail = RequestCode.GET
msg.messageId = random.randint(0, 65535)
if queryName == "core":
msg.addOption(CoapOption(OptionType.UriPath, ".well-known"))
msg.addOption(CoapOption(OptionType.UriPath, "core"))
# send message
log.debug("Sending query")
self._client.send(msg)