UaProcessor._process_message() - Code Metrics - Inspection of "treat TimeoutHint=0 as mandated by OPC Unified Arc..." - FreeOpcUa/python-opcua - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 10a906...bb8334 )

by Olivier

created 2017-10-27 10:32 UTC

UaProcessor._process_message() F

↳ Parent: UaProcessor

Complexity

Conditions

Size

Total Lines

346

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	178
CRAP Score	49.8411

Importance

Changes	2
Bugs	0	Features	1

Metric	Value
cc	34
c	2
b	0
f	1
dl	0
loc	346
ccs	178
cts	234
cp	0.7607
crap	49.8411
rs	2

How to fix Long Method Complexity


import logging
from threading import RLock, Lock
import time

from opcua import ua
from opcua.common import utils


class PublishRequestData(object):

    def __init__(self):
        self.requesthdr = None
        self.algohdr = None
        self.seqhdr = None
        self.timestamp = time.time()


class UaProcessor(object):

    def __init__(self, internal_server, socket):
        self.logger = logging.getLogger(__name__)
        self.iserver = internal_server
        self.name = socket.get_extra_info('peername')
        self.sockname = socket.get_extra_info('sockname')
        self.session = None
        self.socket = socket
        self._socketlock = Lock()
        self._datalock = RLock()
        self._publishdata_queue = []
        self._publish_result_queue = []  # used when we need to wait for PublishRequest
        self._connection = ua.SecureConnection(ua.SecurityPolicy())

    def set_policies(self, policies):
        self._connection.set_policy_factories(policies)

    def send_response(self, requesthandle, algohdr, seqhdr, response, msgtype=ua.MessageType.SecureMessage):
        with self._socketlock:
            response.ResponseHeader.RequestHandle = requesthandle
            data = self._connection.message_to_binary(
                response.to_binary(), message_type=msgtype, request_id=seqhdr.RequestId, algohdr=algohdr)

            self.socket.write(data)

    def open_secure_channel(self, algohdr, seqhdr, body):
        request = ua.OpenSecureChannelRequest.from_binary(body)

        self._connection.select_policy(
            algohdr.SecurityPolicyURI, algohdr.SenderCertificate, request.Parameters.SecurityMode)

        channel = self._connection.open(request.Parameters, self.iserver)
        # send response
        response = ua.OpenSecureChannelResponse()
        response.Parameters = channel
        self.send_response(request.RequestHeader.RequestHandle, None, seqhdr, response, ua.MessageType.SecureOpen)

    def forward_publish_response(self, result):
        self.logger.info("forward publish response %s", result)
        with self._datalock:
            while True:
                if len(self._publishdata_queue) == 0:
                    self._publish_result_queue.append(result)
                    self.logger.info("Server wants to send publish answer but no publish request is available,"
                                     "enqueing notification, length of result queue is %s",
                                     len(self._publish_result_queue))
                    return
                requestdata = self._publishdata_queue.pop(0)
                if requestdata.requesthdr.TimeoutHint == 0 or requestdata.requesthdr.TimeoutHint != 0 and time.time() - requestdata.timestamp < requestdata.requesthdr.TimeoutHint / 1000:
                    break

        response = ua.PublishResponse()
        response.Parameters = result

        self.send_response(requestdata.requesthdr.RequestHandle, requestdata.algohdr, requestdata.seqhdr, response)

    def process(self, header, body):
        msg = self._connection.receive_from_header_and_body(header, body)
        if isinstance(msg, ua.Message):
            if header.MessageType == ua.MessageType.SecureOpen:
                self.open_secure_channel(msg.SecurityHeader(), msg.SequenceHeader(), msg.body())

            elif header.MessageType == ua.MessageType.SecureClose:
                self._connection.close()
                return False

            elif header.MessageType == ua.MessageType.SecureMessage:
                return self.process_message(msg.SecurityHeader(), msg.SequenceHeader(), msg.body())
        elif isinstance(msg, ua.Hello):
            ack = ua.Acknowledge()
            ack.ReceiveBufferSize = msg.ReceiveBufferSize
            ack.SendBufferSize = msg.SendBufferSize
            data = self._connection.tcp_to_binary(ua.MessageType.Acknowledge, ack)
            self.socket.write(data)
        elif isinstance(msg, ua.ErrorMessage):
            self.logger.warning("Received an error message type")
        elif msg is None:
            pass  # msg is a ChunkType.Intermediate of an ua.MessageType.SecureMessage
        else:
            self.logger.warning("Unsupported message type: %s", header.MessageType)
            raise utils.ServiceError(ua.StatusCodes.BadTcpMessageTypeInvalid)
        return True

    def process_message(self, algohdr, seqhdr, body):
        typeid = ua.NodeId.from_binary(body)
        requesthdr = ua.RequestHeader.from_binary(body)
        try:
            return self._process_message(typeid, requesthdr, algohdr, seqhdr, body)
        except utils.ServiceError as e:
            status = ua.StatusCode(e.code)
            response = ua.ServiceFault()
            response.ResponseHeader.ServiceResult = status
            self.logger.info("sending service fault response: %s (%s)", status.doc, status.name)
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
            return True

    def _process_message(self, typeid, requesthdr, algohdr, seqhdr, body):
        if typeid == ua.NodeId(ua.ObjectIds.CreateSessionRequest_Encoding_DefaultBinary):
            self.logger.info("Create session request")
            params = ua.CreateSessionParameters.from_binary(body)

            # create the session on server
            self.session = self.iserver.create_session(self.name, external=True)
            # get a session creation result to send back
            sessiondata = self.session.create_session(params, sockname=self.sockname)

            response = ua.CreateSessionResponse()
            response.Parameters = sessiondata
            response.Parameters.ServerCertificate = self._connection._security_policy.client_certificate
            if self._connection._security_policy.server_certificate is None:
                data = params.ClientNonce
            else:
                data = self._connection._security_policy.server_certificate + params.ClientNonce
            response.Parameters.ServerSignature.Signature = \
                self._connection._security_policy.asymmetric_cryptography.signature(data)

            response.Parameters.ServerSignature.Algorithm = "http://www.w3.org/2000/09/xmldsig#rsa-sha1"

            self.logger.info("sending create sesssion response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.CloseSessionRequest_Encoding_DefaultBinary):
            self.logger.info("Close session request")
            deletesubs = ua.ua_binary.Primitives.Boolean.unpack(body)

            self.session.close_session(deletesubs)

            response = ua.CloseSessionResponse()
            self.logger.info("sending close sesssion response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.ActivateSessionRequest_Encoding_DefaultBinary):
            self.logger.info("Activate session request")
            params = ua.ActivateSessionParameters.from_binary(body)

            if not self.session:
                self.logger.info("request to activate non-existing session")
                raise utils.ServiceError(ua.StatusCodes.BadSessionIdInvalid)

            if self._connection._security_policy.client_certificate is None:
                data = self.session.nonce
            else:
                data = self._connection._security_policy.client_certificate + self.session.nonce
            self._connection._security_policy.asymmetric_cryptography.verify(data, params.ClientSignature.Signature)

            result = self.session.activate_session(params)

            response = ua.ActivateSessionResponse()
            response.Parameters = result

            self.logger.info("sending read response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.ReadRequest_Encoding_DefaultBinary):
            self.logger.info("Read request")
            params = ua.ReadParameters.from_binary(body)

            results = self.session.read(params)

            response = ua.ReadResponse()
            response.Results = results

            self.logger.info("sending read response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.WriteRequest_Encoding_DefaultBinary):
            self.logger.info("Write request")
            params = ua.WriteParameters.from_binary(body)

            results = self.session.write(params)

            response = ua.WriteResponse()
            response.Results = results

            self.logger.info("sending write response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.BrowseRequest_Encoding_DefaultBinary):
            self.logger.info("Browse request")
            params = ua.BrowseParameters.from_binary(body)

            results = self.session.browse(params)

            response = ua.BrowseResponse()
            response.Results = results

            self.logger.info("sending browse response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.GetEndpointsRequest_Encoding_DefaultBinary):
            self.logger.info("get endpoints request")
            params = ua.GetEndpointsParameters.from_binary(body)

            endpoints = self.iserver.get_endpoints(params, sockname=self.sockname)

            response = ua.GetEndpointsResponse()
            response.Endpoints = endpoints

            self.logger.info("sending get endpoints response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.FindServersRequest_Encoding_DefaultBinary):
            self.logger.info("find servers request")
            params = ua.FindServersParameters.from_binary(body)

            servers = self.iserver.find_servers(params)

            response = ua.FindServersResponse()
            response.Servers = servers

            self.logger.info("sending find servers response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.RegisterServerRequest_Encoding_DefaultBinary):
            self.logger.info("register server request")
            serv = ua.RegisteredServer.from_binary(body)

            self.iserver.register_server(serv)

            response = ua.RegisterServerResponse()

            self.logger.info("sending register server response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.RegisterServer2Request_Encoding_DefaultBinary):
            self.logger.info("register server 2 request")
            params = ua.RegisterServer2Parameters.from_binary(body)

            results = self.iserver.register_server2(params)

            response = ua.RegisterServer2Response()
            response.ConfigurationResults = results

            self.logger.info("sending register server 2 response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.TranslateBrowsePathsToNodeIdsRequest_Encoding_DefaultBinary):
            self.logger.info("translate browsepaths to nodeids request")
            params = ua.TranslateBrowsePathsToNodeIdsParameters.from_binary(body)

            paths = self.session.translate_browsepaths_to_nodeids(params.BrowsePaths)

            response = ua.TranslateBrowsePathsToNodeIdsResponse()
            response.Results = paths

            self.logger.info("sending translate browsepaths to nodeids response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.AddNodesRequest_Encoding_DefaultBinary):
            self.logger.info("add nodes request")
            params = ua.AddNodesParameters.from_binary(body)

            results = self.session.add_nodes(params.NodesToAdd)

            response = ua.AddNodesResponse()
            response.Results = results

            self.logger.info("sending add node response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.DeleteNodesRequest_Encoding_DefaultBinary):
            self.logger.info("delete nodes request")
            params = ua.DeleteNodesParameters.from_binary(body)

            results = self.session.delete_nodes(params)

            response = ua.DeleteNodesResponse()
            response.Results = results

            self.logger.info("sending delete node response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.AddReferencesRequest_Encoding_DefaultBinary):
            self.logger.info("add references request")
            params = ua.AddReferencesParameters.from_binary(body)

            results = self.session.add_references(params.ReferencesToAdd)

            response = ua.AddReferencesResponse()
            response.Results = results

            self.logger.info("sending add references response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.DeleteReferencesRequest_Encoding_DefaultBinary):
            self.logger.info("delete references request")
            params = ua.DeleteReferencesParameters.from_binary(body)

            results = self.session.delete_references(params.ReferencesToDelete)

            response = ua.DeleteReferencesResponse()
            response.Parameters.Results = results

            self.logger.info("sending delete references response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)


        elif typeid == ua.NodeId(ua.ObjectIds.CreateSubscriptionRequest_Encoding_DefaultBinary):
            self.logger.info("create subscription request")
            params = ua.CreateSubscriptionParameters.from_binary(body)

            result = self.session.create_subscription(params, self.forward_publish_response)

            response = ua.CreateSubscriptionResponse()
            response.Parameters = result

            self.logger.info("sending create subscription response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.DeleteSubscriptionsRequest_Encoding_DefaultBinary):
            self.logger.info("delete subscriptions request")
            params = ua.DeleteSubscriptionsParameters.from_binary(body)

            results = self.session.delete_subscriptions(params.SubscriptionIds)

            response = ua.DeleteSubscriptionsResponse()
            response.Results = results

            self.logger.info("sending delte subscription response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.CreateMonitoredItemsRequest_Encoding_DefaultBinary):
            self.logger.info("create monitored items request")
            params = ua.CreateMonitoredItemsParameters.from_binary(body)
            results = self.session.create_monitored_items(params)

            response = ua.CreateMonitoredItemsResponse()
            response.Results = results

            self.logger.info("sending create monitored items response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.ModifyMonitoredItemsRequest_Encoding_DefaultBinary):
            self.logger.info("modify monitored items request")
            params = ua.ModifyMonitoredItemsParameters.from_binary(body)
            results = self.session.modify_monitored_items(params)

            response = ua.ModifyMonitoredItemsResponse()
            response.Results = results

            self.logger.info("sending modify monitored items response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.DeleteMonitoredItemsRequest_Encoding_DefaultBinary):
            self.logger.info("delete monitored items request")
            params = ua.DeleteMonitoredItemsParameters.from_binary(body)

            results = self.session.delete_monitored_items(params)

            response = ua.DeleteMonitoredItemsResponse()
            response.Results = results

            self.logger.info("sending delete monitored items response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.HistoryReadRequest_Encoding_DefaultBinary):
            self.logger.info("history read request")
            params = ua.HistoryReadParameters.from_binary(body)

            results = self.session.history_read(params)

            response = ua.HistoryReadResponse()
            response.Results = results

            self.logger.info("sending history read response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.RegisterNodesRequest_Encoding_DefaultBinary):
            self.logger.info("register nodes request")
            params = ua.RegisterNodesParameters.from_binary(body)
            self.logger.info("Node registration not implemented")

            response = ua.RegisterNodesResponse()
            response.Parameters.RegisteredNodeIds = params.NodesToRegister

            self.logger.info("sending register nodes response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.UnregisterNodesRequest_Encoding_DefaultBinary):
            self.logger.info("unregister nodes request")
            params = ua.UnregisterNodesParameters.from_binary(body)

            response = ua.UnregisterNodesResponse()

            self.logger.info("sending unregister nodes response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.PublishRequest_Encoding_DefaultBinary):
            self.logger.info("publish request")

            if not self.session:
                return False

            params = ua.PublishParameters.from_binary(body)

            data = PublishRequestData()
            data.requesthdr = requesthdr
            data.seqhdr = seqhdr
            data.algohdr = algohdr
            with self._datalock:
                self._publishdata_queue.append(data)  # will be used to send publish answers from server
                if self._publish_result_queue:
                    result = self._publish_result_queue.pop(0)
                    self.forward_publish_response(result)
            self.session.publish(params.SubscriptionAcknowledgements)
            self.logger.info("publish forward to server")

        elif typeid == ua.NodeId(ua.ObjectIds.RepublishRequest_Encoding_DefaultBinary):
            self.logger.info("re-publish request")

            params = ua.RepublishParameters.from_binary(body)
            msg = self.session.republish(params)

            response = ua.RepublishResponse()
            response.NotificationMessage = msg

            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.CloseSecureChannelRequest_Encoding_DefaultBinary):
            self.logger.info("close secure channel request")
            self._connection.close()
            response = ua.CloseSecureChannelResponse()
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
            return False

        elif typeid == ua.NodeId(ua.ObjectIds.CallRequest_Encoding_DefaultBinary):
            self.logger.info("call request")

            params = ua.CallParameters.from_binary(body)

            results = self.session.call(params.MethodsToCall)

            response = ua.CallResponse()
            response.Results = results

            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        else:
            self.logger.warning("Unknown message received %s", typeid)
            raise utils.ServiceError(ua.StatusCodes.BadNotImplemented)

        return True

    def close(self):
        """
        to be called when client has disconnected to ensure we really close
        everything we should
        """
        print("Cleanup client connection: ", self.name)
        if self.session:
            self.session.close_session(True)


1
2	1	import logging
3	1	from threading import RLock, Lock
4	1	import time
5
6	1	from opcua import ua
7	1	from opcua.common import utils
8
9
10	1	class PublishRequestData(object):
11
12	1	def __init__(self):
13	1	self.requesthdr = None
14	1	self.algohdr = None
15	1	self.seqhdr = None
16	1	self.timestamp = time.time()
17
18
19	1	class UaProcessor(object):
20
21	1	def __init__(self, internal_server, socket):
22	1	self.logger = logging.getLogger(__name__)
23	1	self.iserver = internal_server
24	1	self.name = socket.get_extra_info('peername')
25	1	self.sockname = socket.get_extra_info('sockname')
26	1	self.session = None
27	1	self.socket = socket
28	1	self._socketlock = Lock()
29	1	self._datalock = RLock()
30	1	self._publishdata_queue = []
31	1	self._publish_result_queue = [] # used when we need to wait for PublishRequest
32	1	self._connection = ua.SecureConnection(ua.SecurityPolicy())
33
34	1	def set_policies(self, policies):
35	1	self._connection.set_policy_factories(policies)
36
37	1	def send_response(self, requesthandle, algohdr, seqhdr, response, msgtype=ua.MessageType.SecureMessage):
38	1	with self._socketlock:
39	1	response.ResponseHeader.RequestHandle = requesthandle
40	1	data = self._connection.message_to_binary(
41		response.to_binary(), message_type=msgtype, request_id=seqhdr.RequestId, algohdr=algohdr)
42
43	1	self.socket.write(data)
44
45	1	def open_secure_channel(self, algohdr, seqhdr, body):
46	1	request = ua.OpenSecureChannelRequest.from_binary(body)
47
48	1	self._connection.select_policy(
49		algohdr.SecurityPolicyURI, algohdr.SenderCertificate, request.Parameters.SecurityMode)
50
51	1	channel = self._connection.open(request.Parameters, self.iserver)
52		# send response
53	1	response = ua.OpenSecureChannelResponse()
54	1	response.Parameters = channel
55	1	self.send_response(request.RequestHeader.RequestHandle, None, seqhdr, response, ua.MessageType.SecureOpen)
56
57	1	def forward_publish_response(self, result):
58	1	self.logger.info("forward publish response %s", result)
59	1	with self._datalock:
60	1	while True:
61	1	if len(self._publishdata_queue) == 0:
62		self._publish_result_queue.append(result)
63		self.logger.info("Server wants to send publish answer but no publish request is available,"
64		"enqueing notification, length of result queue is %s",
65		len(self._publish_result_queue))
66		return
67	1	requestdata = self._publishdata_queue.pop(0)
68	1	if requestdata.requesthdr.TimeoutHint == 0 or requestdata.requesthdr.TimeoutHint != 0 and time.time() - requestdata.timestamp < requestdata.requesthdr.TimeoutHint / 1000:
69	1	break
70
71	1	response = ua.PublishResponse()
72	1	response.Parameters = result
73
74	1	self.send_response(requestdata.requesthdr.RequestHandle, requestdata.algohdr, requestdata.seqhdr, response)
75
76	1	def process(self, header, body):
77	1	msg = self._connection.receive_from_header_and_body(header, body)
78	1	if isinstance(msg, ua.Message):
79	1	if header.MessageType == ua.MessageType.SecureOpen:
80	1	self.open_secure_channel(msg.SecurityHeader(), msg.SequenceHeader(), msg.body())
81
82	1	elif header.MessageType == ua.MessageType.SecureClose:
83	1	self._connection.close()
84	1	return False
85
86	1	elif header.MessageType == ua.MessageType.SecureMessage:
87	1	return self.process_message(msg.SecurityHeader(), msg.SequenceHeader(), msg.body())
88	1	elif isinstance(msg, ua.Hello):
89	1	ack = ua.Acknowledge()
90	1	ack.ReceiveBufferSize = msg.ReceiveBufferSize
91	1	ack.SendBufferSize = msg.SendBufferSize
92	1	data = self._connection.tcp_to_binary(ua.MessageType.Acknowledge, ack)
93	1	self.socket.write(data)
94		elif isinstance(msg, ua.ErrorMessage):
95		self.logger.warning("Received an error message type")
96		elif msg is None:
97		pass # msg is a ChunkType.Intermediate of an ua.MessageType.SecureMessage
98		else:
99		self.logger.warning("Unsupported message type: %s", header.MessageType)
100		raise utils.ServiceError(ua.StatusCodes.BadTcpMessageTypeInvalid)
101	1	return True
102
103	1	def process_message(self, algohdr, seqhdr, body):
104	1	typeid = ua.NodeId.from_binary(body)
105	1	requesthdr = ua.RequestHeader.from_binary(body)
106	1	try:
107	1	return self._process_message(typeid, requesthdr, algohdr, seqhdr, body)
108	1	except utils.ServiceError as e:
109	1	status = ua.StatusCode(e.code)
110	1	response = ua.ServiceFault()
111	1	response.ResponseHeader.ServiceResult = status
112	1	self.logger.info("sending service fault response: %s (%s)", status.doc, status.name)
113	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
114	1	return True
115
116	1	def _process_message(self, typeid, requesthdr, algohdr, seqhdr, body):
117	1	if typeid == ua.NodeId(ua.ObjectIds.CreateSessionRequest_Encoding_DefaultBinary):
118	1	self.logger.info("Create session request")
119	1	params = ua.CreateSessionParameters.from_binary(body)
120
121		# create the session on server
122	1	self.session = self.iserver.create_session(self.name, external=True)
123		# get a session creation result to send back
124	1	sessiondata = self.session.create_session(params, sockname=self.sockname)
125
126	1	response = ua.CreateSessionResponse()
127	1	response.Parameters = sessiondata
128	1	response.Parameters.ServerCertificate = self._connection._security_policy.client_certificate
129	1	if self._connection._security_policy.server_certificate is None:
130	1	data = params.ClientNonce
131		else:
132	1	data = self._connection._security_policy.server_certificate + params.ClientNonce
133	1	response.Parameters.ServerSignature.Signature = \
134		self._connection._security_policy.asymmetric_cryptography.signature(data)
135
136	1	response.Parameters.ServerSignature.Algorithm = "http://www.w3.org/2000/09/xmldsig#rsa-sha1"
137
138	1	self.logger.info("sending create sesssion response")
139	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
140
141	1	elif typeid == ua.NodeId(ua.ObjectIds.CloseSessionRequest_Encoding_DefaultBinary):
142	1	self.logger.info("Close session request")
143	1	deletesubs = ua.ua_binary.Primitives.Boolean.unpack(body)
144
145	1	self.session.close_session(deletesubs)
146
147	1	response = ua.CloseSessionResponse()
148	1	self.logger.info("sending close sesssion response")
149	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
150
151	1	elif typeid == ua.NodeId(ua.ObjectIds.ActivateSessionRequest_Encoding_DefaultBinary):
152	1	self.logger.info("Activate session request")
153	1	params = ua.ActivateSessionParameters.from_binary(body)
154
155	1	if not self.session:
156		self.logger.info("request to activate non-existing session")
157		raise utils.ServiceError(ua.StatusCodes.BadSessionIdInvalid)
158
159	1	if self._connection._security_policy.client_certificate is None:
160	1	data = self.session.nonce
161		else:
162	1	data = self._connection._security_policy.client_certificate + self.session.nonce
163	1	self._connection._security_policy.asymmetric_cryptography.verify(data, params.ClientSignature.Signature)
164
165	1	result = self.session.activate_session(params)
166
167	1	response = ua.ActivateSessionResponse()
168	1	response.Parameters = result
169
170	1	self.logger.info("sending read response")
171	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
172
173	1	elif typeid == ua.NodeId(ua.ObjectIds.ReadRequest_Encoding_DefaultBinary):
174	1	self.logger.info("Read request")
175	1	params = ua.ReadParameters.from_binary(body)
176
177	1	results = self.session.read(params)
178
179	1	response = ua.ReadResponse()
180	1	response.Results = results
181
182	1	self.logger.info("sending read response")
183	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
184
185	1	elif typeid == ua.NodeId(ua.ObjectIds.WriteRequest_Encoding_DefaultBinary):
186	1	self.logger.info("Write request")
187	1	params = ua.WriteParameters.from_binary(body)
188
189	1	results = self.session.write(params)
190
191	1	response = ua.WriteResponse()
192	1	response.Results = results
193
194	1	self.logger.info("sending write response")
195	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
196
197	1	elif typeid == ua.NodeId(ua.ObjectIds.BrowseRequest_Encoding_DefaultBinary):
198	1	self.logger.info("Browse request")
199	1	params = ua.BrowseParameters.from_binary(body)
200
201	1	results = self.session.browse(params)
202
203	1	response = ua.BrowseResponse()
204	1	response.Results = results
205
206	1	self.logger.info("sending browse response")
207	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
208
209	1	elif typeid == ua.NodeId(ua.ObjectIds.GetEndpointsRequest_Encoding_DefaultBinary):
210	1	self.logger.info("get endpoints request")
211	1	params = ua.GetEndpointsParameters.from_binary(body)
212
213	1	endpoints = self.iserver.get_endpoints(params, sockname=self.sockname)
214
215	1	response = ua.GetEndpointsResponse()
216	1	response.Endpoints = endpoints
217
218	1	self.logger.info("sending get endpoints response")
219	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
220
221	1	elif typeid == ua.NodeId(ua.ObjectIds.FindServersRequest_Encoding_DefaultBinary):
222	1	self.logger.info("find servers request")
223	1	params = ua.FindServersParameters.from_binary(body)
224
225	1	servers = self.iserver.find_servers(params)
226
227	1	response = ua.FindServersResponse()
228	1	response.Servers = servers
229
230	1	self.logger.info("sending find servers response")
231	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
232
233	1	elif typeid == ua.NodeId(ua.ObjectIds.RegisterServerRequest_Encoding_DefaultBinary):
234	1	self.logger.info("register server request")
235	1	serv = ua.RegisteredServer.from_binary(body)
236
237	1	self.iserver.register_server(serv)
238
239	1	response = ua.RegisterServerResponse()
240
241	1	self.logger.info("sending register server response")
242	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
243
244	1	elif typeid == ua.NodeId(ua.ObjectIds.RegisterServer2Request_Encoding_DefaultBinary):
245		self.logger.info("register server 2 request")
246		params = ua.RegisterServer2Parameters.from_binary(body)
247
248		results = self.iserver.register_server2(params)
249
250		response = ua.RegisterServer2Response()
251		response.ConfigurationResults = results
252
253		self.logger.info("sending register server 2 response")
254		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
255
256	1	elif typeid == ua.NodeId(ua.ObjectIds.TranslateBrowsePathsToNodeIdsRequest_Encoding_DefaultBinary):
257	1	self.logger.info("translate browsepaths to nodeids request")
258	1	params = ua.TranslateBrowsePathsToNodeIdsParameters.from_binary(body)
259
260	1	paths = self.session.translate_browsepaths_to_nodeids(params.BrowsePaths)
261
262	1	response = ua.TranslateBrowsePathsToNodeIdsResponse()
263	1	response.Results = paths
264
265	1	self.logger.info("sending translate browsepaths to nodeids response")
266	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
267
268	1	elif typeid == ua.NodeId(ua.ObjectIds.AddNodesRequest_Encoding_DefaultBinary):
269	1	self.logger.info("add nodes request")
270	1	params = ua.AddNodesParameters.from_binary(body)
271
272	1	results = self.session.add_nodes(params.NodesToAdd)
273
274	1	response = ua.AddNodesResponse()
275	1	response.Results = results
276
277	1	self.logger.info("sending add node response")
278	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
279
280	1	elif typeid == ua.NodeId(ua.ObjectIds.DeleteNodesRequest_Encoding_DefaultBinary):
281	1	self.logger.info("delete nodes request")
282	1	params = ua.DeleteNodesParameters.from_binary(body)
283
284	1	results = self.session.delete_nodes(params)
285
286	1	response = ua.DeleteNodesResponse()
287	1	response.Results = results
288
289	1	self.logger.info("sending delete node response")
290	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
291
292	1	elif typeid == ua.NodeId(ua.ObjectIds.AddReferencesRequest_Encoding_DefaultBinary):
293	1	self.logger.info("add references request")
294	1	params = ua.AddReferencesParameters.from_binary(body)
295
296	1	results = self.session.add_references(params.ReferencesToAdd)
297
298	1	response = ua.AddReferencesResponse()
299	1	response.Results = results
300
301	1	self.logger.info("sending add references response")
302	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
303
304	1	elif typeid == ua.NodeId(ua.ObjectIds.DeleteReferencesRequest_Encoding_DefaultBinary):
305		self.logger.info("delete references request")
306		params = ua.DeleteReferencesParameters.from_binary(body)
307
308		results = self.session.delete_references(params.ReferencesToDelete)
309
310		response = ua.DeleteReferencesResponse()
311		response.Parameters.Results = results
312
313		self.logger.info("sending delete references response")
314		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
315
316
317	1	elif typeid == ua.NodeId(ua.ObjectIds.CreateSubscriptionRequest_Encoding_DefaultBinary):
318	1	self.logger.info("create subscription request")
319	1	params = ua.CreateSubscriptionParameters.from_binary(body)
320
321	1	result = self.session.create_subscription(params, self.forward_publish_response)
322
323	1	response = ua.CreateSubscriptionResponse()
324	1	response.Parameters = result
325
326	1	self.logger.info("sending create subscription response")
327	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
328
329	1	elif typeid == ua.NodeId(ua.ObjectIds.DeleteSubscriptionsRequest_Encoding_DefaultBinary):
330	1	self.logger.info("delete subscriptions request")
331	1	params = ua.DeleteSubscriptionsParameters.from_binary(body)
332
333	1	results = self.session.delete_subscriptions(params.SubscriptionIds)
334
335	1	response = ua.DeleteSubscriptionsResponse()
336	1	response.Results = results
337
338	1	self.logger.info("sending delte subscription response")
339	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
340
341	1	elif typeid == ua.NodeId(ua.ObjectIds.CreateMonitoredItemsRequest_Encoding_DefaultBinary):
342	1	self.logger.info("create monitored items request")
343	1	params = ua.CreateMonitoredItemsParameters.from_binary(body)
344	1	results = self.session.create_monitored_items(params)
345
346	1	response = ua.CreateMonitoredItemsResponse()
347	1	response.Results = results
348
349	1	self.logger.info("sending create monitored items response")
350	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
351
352	1	elif typeid == ua.NodeId(ua.ObjectIds.ModifyMonitoredItemsRequest_Encoding_DefaultBinary):
353		self.logger.info("modify monitored items request")
354		params = ua.ModifyMonitoredItemsParameters.from_binary(body)
355		results = self.session.modify_monitored_items(params)
356
357		response = ua.ModifyMonitoredItemsResponse()
358		response.Results = results
359
360		self.logger.info("sending modify monitored items response")
361		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
362
363	1	elif typeid == ua.NodeId(ua.ObjectIds.DeleteMonitoredItemsRequest_Encoding_DefaultBinary):
364	1	self.logger.info("delete monitored items request")
365	1	params = ua.DeleteMonitoredItemsParameters.from_binary(body)
366
367	1	results = self.session.delete_monitored_items(params)
368
369	1	response = ua.DeleteMonitoredItemsResponse()
370	1	response.Results = results
371
372	1	self.logger.info("sending delete monitored items response")
373	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
374
375	1	elif typeid == ua.NodeId(ua.ObjectIds.HistoryReadRequest_Encoding_DefaultBinary):
376		self.logger.info("history read request")
377		params = ua.HistoryReadParameters.from_binary(body)
378
379		results = self.session.history_read(params)
380
381		response = ua.HistoryReadResponse()
382		response.Results = results
383
384		self.logger.info("sending history read response")
385		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
386
387	1	elif typeid == ua.NodeId(ua.ObjectIds.RegisterNodesRequest_Encoding_DefaultBinary):
388		self.logger.info("register nodes request")
389		params = ua.RegisterNodesParameters.from_binary(body)
390		self.logger.info("Node registration not implemented")
391
392		response = ua.RegisterNodesResponse()
393		response.Parameters.RegisteredNodeIds = params.NodesToRegister
394
395		self.logger.info("sending register nodes response")
396		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
397
398	1	elif typeid == ua.NodeId(ua.ObjectIds.UnregisterNodesRequest_Encoding_DefaultBinary):
399		self.logger.info("unregister nodes request")
400		params = ua.UnregisterNodesParameters.from_binary(body)
401
402		response = ua.UnregisterNodesResponse()
403
404		self.logger.info("sending unregister nodes response")
405		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
406
407	1	elif typeid == ua.NodeId(ua.ObjectIds.PublishRequest_Encoding_DefaultBinary):
408	1	self.logger.info("publish request")
409
410	1	if not self.session:
411		return False
412
413	1	params = ua.PublishParameters.from_binary(body)
414
415	1	data = PublishRequestData()
416	1	data.requesthdr = requesthdr
417	1	data.seqhdr = seqhdr
418	1	data.algohdr = algohdr
419	1	with self._datalock:
420	1	self._publishdata_queue.append(data) # will be used to send publish answers from server
421	1	if self._publish_result_queue:
422		result = self._publish_result_queue.pop(0)
423		self.forward_publish_response(result)
424	1	self.session.publish(params.SubscriptionAcknowledgements)
425	1	self.logger.info("publish forward to server")
426
427	1	elif typeid == ua.NodeId(ua.ObjectIds.RepublishRequest_Encoding_DefaultBinary):
428		self.logger.info("re-publish request")
429
430		params = ua.RepublishParameters.from_binary(body)
431		msg = self.session.republish(params)
432
433		response = ua.RepublishResponse()
434		response.NotificationMessage = msg
435
436		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
437
438	1	elif typeid == ua.NodeId(ua.ObjectIds.CloseSecureChannelRequest_Encoding_DefaultBinary):
439		self.logger.info("close secure channel request")
440		self._connection.close()
441		response = ua.CloseSecureChannelResponse()
442		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
443		return False
444
445	1	elif typeid == ua.NodeId(ua.ObjectIds.CallRequest_Encoding_DefaultBinary):
446	1	self.logger.info("call request")
447
448	1	params = ua.CallParameters.from_binary(body)
449
450	1	results = self.session.call(params.MethodsToCall)
451
452	1	response = ua.CallResponse()
453	1	response.Results = results
454
455	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
456
457		else:
458	1	self.logger.warning("Unknown message received %s", typeid)
459	1	raise utils.ServiceError(ua.StatusCodes.BadNotImplemented)
460
461	1	return True
462
463	1	def close(self):
464		"""
465		to be called when client has disconnected to ensure we really close
466		everything we should
467		"""
468	1	print("Cleanup client connection: ", self.name)
469	1	if self.session:
470		self.session.close_session(True)
471

FreeOpcUa / python-opcua

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UaProcessor._process_message() F

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