opcua.server.UaProcessor._process_message() - Code Metrics - Inspection of "Merge pull request #124 from FreeOpcUa/dev" - FreeOpcUa/python-opcua - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 00ad73...c8d9dd )

by Olivier

created 2016-01-25 16:40 UTC

opcua.server.UaProcessor._process_message() F

↳ Parent: opcua.server.UaProcessor

Complexity

Conditions

Size

Total Lines

274

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	159
CRAP Score	28.2678

Metric	Value
cc	26
dl	0
loc	274
ccs	159
cts	187
cp	0.8503
crap	28.2678
rs	2

How to fix Long Method Complexity


import logging
from threading import Lock
from datetime import datetime

from opcua import ua
from opcua.common import utils


class PublishRequestData(object):

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


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.channel = None
        self.socket = socket
        self._socketlock = Lock()
        self._datalock = Lock()
        self._publishdata_queue = []
        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(),
                    msgtype, seqhdr.RequestId)
            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._open_secure_channel(request.Parameters)
        # send response
        response = ua.OpenSecureChannelResponse()
        response.Parameters = channel
        self.send_response(request.RequestHeader.RequestHandle, algohdr, seqhdr, response, ua.MessageType.SecureOpen)

    def forward_publish_response(self, result):
        self.logger.info("forward publish response %s", result)
        with self._datalock:
            if len(self._publishdata_queue) == 0:
                self.logger.warning("Error server wants to send publish answer but no publish request is available")
                return
            requestdata = self._publishdata_queue.pop(0)
        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:
                if not self.channel or header.ChannelId != self.channel.SecurityToken.ChannelId:
                    self.logger.warning("Request to close channel %s which was not issued, current channel is %s", header.ChannelId, self.channel)
                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")

        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)

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

            response = ua.CreateSessionResponse()
            response.Parameters = sessiondata
            response.Parameters.ServerCertificate = self._connection._security_policy.client_certificate
            response.Parameters.ServerSignature.Signature = self._connection._security_policy.asymmetric_cryptography.signature(self._connection._security_policy.server_certificate + params.ClientNonce)
            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.unpack_uatype('Boolean', 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)

            self._connection._security_policy.asymmetric_cryptography.verify(self._connection._security_policy.client_certificate + self.session.nonce, 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.NodesToDelete)

            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.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.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
            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")
            response = ua.CloseSecureChannelResponse()
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
            self.channel = None
            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 _open_secure_channel(self, params):
        self.logger.info("open secure channel")
        if not self.channel or params.RequestType == ua.SecurityTokenRequestType.Issue:
            self.channel = ua.OpenSecureChannelResult()
            self.channel.SecurityToken.TokenId = 13  # random value
            self.channel.SecurityToken.ChannelId = self.iserver.get_new_channel_id()
            self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
        self.channel.SecurityToken.TokenId += 1
        self.channel.SecurityToken.CreatedAt = datetime.utcnow()
        self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
        self.channel.ServerNonce = utils.create_nonce(self._connection._security_policy.symmetric_key_size)
        self._connection.set_security_token(self.channel.SecurityToken)
        self._connection._security_policy.make_symmetric_key(self.channel.ServerNonce, params.ClientNonce)
        return self.channel

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

FreeOpcUa / python-opcua

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opcua.server.UaProcessor._process_message() F

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