FreeOpcUa /
python-opcua
| Conditions | 39 |
| Total Lines | 401 |
| Lines | 0 |
| Ratio | 0 % |
| Tests | 190 |
| CRAP Score | 56.9327 |
| Changes | 4 | ||
| Bugs | 1 | Features | 1 |
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
Complex classes like UaProcessor._process_message() often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
| 1 | |||
| 119 | 1 | def _process_message(self, typeid, requesthdr, algohdr, seqhdr, body): |
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| 120 | 1 | if typeid == ua.NodeId(ua.ObjectIds.CreateSessionRequest_Encoding_DefaultBinary): |
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| 121 | 1 | self.logger.info("Create session request") |
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| 122 | 1 | params = struct_from_binary(ua.CreateSessionParameters, body) |
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| 123 | |||
| 124 | # create the session on server |
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| 125 | 1 | self.session = self.iserver.create_session(self.name, external=True) |
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| 126 | # get a session creation result to send back |
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| 127 | 1 | sessiondata = self.session.create_session(params, sockname=self.sockname) |
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| 128 | |||
| 129 | 1 | response = ua.CreateSessionResponse() |
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| 130 | 1 | response.Parameters = sessiondata |
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| 131 | 1 | response.Parameters.ServerCertificate = self._connection.security_policy.client_certificate |
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| 132 | 1 | if self._connection.security_policy.server_certificate is None: |
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| 133 | 1 | data = params.ClientNonce |
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| 134 | else: |
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| 135 | 1 | data = self._connection.security_policy.server_certificate + params.ClientNonce |
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| 136 | 1 | response.Parameters.ServerSignature.Signature = \ |
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| 137 | self._connection.security_policy.asymmetric_cryptography.signature(data) |
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| 138 | |||
| 139 | 1 | response.Parameters.ServerSignature.Algorithm = "http://www.w3.org/2000/09/xmldsig#rsa-sha1" |
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| 140 | |||
| 141 | 1 | self.logger.info("sending create session response") |
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| 142 | 1 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 143 | |||
| 144 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.CloseSessionRequest_Encoding_DefaultBinary): |
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| 145 | 1 | self.logger.info("Close session request") |
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| 146 | 1 | deletesubs = ua.ua_binary.Primitives.Boolean.unpack(body) |
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| 147 | |||
| 148 | 1 | self.session.close_session(deletesubs) |
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| 149 | |||
| 150 | 1 | response = ua.CloseSessionResponse() |
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| 151 | 1 | self.logger.info("sending close session response") |
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| 152 | 1 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 153 | |||
| 154 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.ActivateSessionRequest_Encoding_DefaultBinary): |
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| 155 | 1 | self.logger.info("Activate session request") |
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| 156 | 1 | params = struct_from_binary(ua.ActivateSessionParameters, body) |
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| 157 | |||
| 158 | 1 | if not self.session: |
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| 159 | self.logger.info("request to activate non-existing session") |
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| 160 | raise utils.ServiceError(ua.StatusCodes.BadSessionIdInvalid) |
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| 161 | |||
| 162 | 1 | if self._connection.security_policy.client_certificate is None: |
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| 163 | 1 | data = self.session.nonce |
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| 164 | else: |
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| 165 | 1 | data = self._connection.security_policy.client_certificate + self.session.nonce |
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| 166 | 1 | self._connection.security_policy.asymmetric_cryptography.verify(data, params.ClientSignature.Signature) |
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| 167 | |||
| 168 | 1 | # |
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| 169 | # somewhere create a list of trusted certificates |
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| 170 | 1 | # |
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| 171 | 1 | from opcua.crypto import uacrypto |
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| 172 | trusted_certificates = [uacrypto.load_certificate('certificate-example.der')] |
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| 173 | 1 | ||
| 174 | 1 | # |
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| 175 | # To be implmeneted in the asymmetric_cryptography.verify (just called function above) |
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| 176 | 1 | # |
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| 177 | 1 | from opcua.crypto import uacrypto |
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| 178 | 1 | client_cert = params.UserIdentityToken.CertificateData |
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| 179 | sig1 = params.ClientSignature.Signature |
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| 180 | 1 | sig2 = params.UserTokenSignature.Signature |
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| 181 | verification_passed = False |
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| 182 | 1 | ||
| 183 | 1 | ''' |
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| 184 | # test |
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| 185 | 1 | cert1 = uacrypto.load_certificate('certificate-example.der') |
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| 186 | 1 | cert2 = uacrypto.load_certificate('cert.pem') |
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| 187 | import pdb |
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| 188 | 1 | pdb.set_trace() |
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| 189 | 1 | ''' |
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| 190 | 1 | ||
| 191 | for cert in trusted_certificates: |
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| 192 | 1 | if uacrypto.der_from_x509(cert) == client_cert: |
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| 193 | # even if certificates match, veryfy that a matching key is assigned with the signature |
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| 194 | 1 | # not sure what is the role of data here but the verification can't be done with any data |
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| 195 | 1 | try: |
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| 196 | uacrypto.verify_sha1(cert, data, sig2) |
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| 197 | 1 | verification_passed = True |
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| 198 | 1 | except: |
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| 199 | self.logger.warning('Faulty client signature received by server during connection activation') |
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| 200 | 1 | break |
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| 201 | 1 | ||
| 202 | 1 | if verification_passed: |
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| 203 | self.logger.info('Verification of signature with a trusted certificate is confirmed') |
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| 204 | 1 | else: |
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| 205 | self.logger.warning('An untrusted client activates a session with the server!!!') |
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| 206 | 1 | ||
| 207 | 1 | # |
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| 208 | ####### |
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| 209 | 1 | # |
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| 210 | 1 | ||
| 211 | result = self.session.activate_session(params) |
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| 212 | 1 | ||
| 213 | 1 | response = ua.ActivateSessionResponse() |
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| 214 | 1 | response.Parameters = result |
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| 215 | |||
| 216 | 1 | self.logger.info("sending read response") |
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| 217 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 218 | 1 | ||
| 219 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.ReadRequest_Encoding_DefaultBinary): |
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| 220 | self.logger.info("Read request") |
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| 221 | 1 | params = struct_from_binary(ua.ReadParameters, body) |
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| 222 | 1 | ||
| 223 | results = self.session.read(params) |
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| 224 | 1 | ||
| 225 | 1 | response = ua.ReadResponse() |
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| 226 | 1 | response.Results = results |
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| 227 | |||
| 228 | 1 | self.logger.info("sending read response") |
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| 229 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 230 | 1 | ||
| 231 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.WriteRequest_Encoding_DefaultBinary): |
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| 232 | self.logger.info("Write request") |
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| 233 | 1 | params = struct_from_binary(ua.WriteParameters, body) |
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| 234 | 1 | ||
| 235 | results = self.session.write(params) |
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| 236 | 1 | ||
| 237 | 1 | response = ua.WriteResponse() |
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| 238 | 1 | response.Results = results |
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| 239 | |||
| 240 | 1 | self.logger.info("sending write response") |
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| 241 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 242 | 1 | ||
| 243 | elif typeid == ua.NodeId(ua.ObjectIds.BrowseRequest_Encoding_DefaultBinary): |
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| 244 | 1 | self.logger.info("Browse request") |
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| 245 | 1 | params = struct_from_binary(ua.BrowseParameters, body) |
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| 246 | |||
| 247 | 1 | results = self.session.browse(params) |
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| 248 | |||
| 249 | response = ua.BrowseResponse() |
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| 250 | response.Results = results |
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| 251 | |||
| 252 | self.logger.info("sending browse response") |
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| 253 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 254 | |||
| 255 | elif typeid == ua.NodeId(ua.ObjectIds.GetEndpointsRequest_Encoding_DefaultBinary): |
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| 256 | self.logger.info("get endpoints request") |
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| 257 | params = struct_from_binary(ua.GetEndpointsParameters, body) |
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| 258 | |||
| 259 | 1 | endpoints = self.iserver.get_endpoints(params, sockname=self.sockname) |
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| 260 | 1 | ||
| 261 | 1 | response = ua.GetEndpointsResponse() |
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| 262 | response.Endpoints = endpoints |
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| 263 | 1 | ||
| 264 | self.logger.info("sending get endpoints response") |
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| 265 | 1 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 266 | 1 | ||
| 267 | elif typeid == ua.NodeId(ua.ObjectIds.FindServersRequest_Encoding_DefaultBinary): |
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| 268 | 1 | self.logger.info("find servers request") |
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| 269 | 1 | params = struct_from_binary(ua.FindServersParameters, body) |
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| 270 | |||
| 271 | 1 | servers = self.iserver.find_servers(params) |
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| 272 | 1 | ||
| 273 | 1 | response = ua.FindServersResponse() |
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| 274 | response.Servers = servers |
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| 275 | 1 | ||
| 276 | self.logger.info("sending find servers response") |
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| 277 | 1 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 278 | 1 | ||
| 279 | elif typeid == ua.NodeId(ua.ObjectIds.RegisterServerRequest_Encoding_DefaultBinary): |
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| 280 | 1 | self.logger.info("register server request") |
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| 281 | 1 | serv = struct_from_binary(ua.RegisteredServer, body) |
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| 282 | |||
| 283 | 1 | self.iserver.register_server(serv) |
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| 284 | 1 | ||
| 285 | 1 | response = ua.RegisterServerResponse() |
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| 286 | |||
| 287 | 1 | self.logger.info("sending register server response") |
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| 288 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 289 | 1 | ||
| 290 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.RegisterServer2Request_Encoding_DefaultBinary): |
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| 291 | self.logger.info("register server 2 request") |
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| 292 | 1 | params = struct_from_binary(ua.RegisterServer2Parameters, body) |
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| 293 | 1 | ||
| 294 | results = self.iserver.register_server2(params) |
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| 295 | 1 | ||
| 296 | 1 | response = ua.RegisterServer2Response() |
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| 297 | 1 | response.ConfigurationResults = results |
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| 298 | |||
| 299 | 1 | self.logger.info("sending register server 2 response") |
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| 300 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 301 | 1 | ||
| 302 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.TranslateBrowsePathsToNodeIdsRequest_Encoding_DefaultBinary): |
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| 303 | self.logger.info("translate browsepaths to nodeids request") |
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| 304 | 1 | params = struct_from_binary(ua.TranslateBrowsePathsToNodeIdsParameters, body) |
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| 305 | 1 | ||
| 306 | paths = self.session.translate_browsepaths_to_nodeids(params.BrowsePaths) |
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| 307 | 1 | ||
| 308 | 1 | response = ua.TranslateBrowsePathsToNodeIdsResponse() |
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| 309 | 1 | response.Results = paths |
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| 310 | |||
| 311 | 1 | self.logger.info("sending translate browsepaths to nodeids response") |
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| 312 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 313 | 1 | ||
| 314 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.AddNodesRequest_Encoding_DefaultBinary): |
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| 315 | self.logger.info("add nodes request") |
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| 316 | 1 | params = struct_from_binary(ua.AddNodesParameters, body) |
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| 317 | 1 | ||
| 318 | results = self.session.add_nodes(params.NodesToAdd) |
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| 319 | |||
| 320 | 1 | response = ua.AddNodesResponse() |
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| 321 | 1 | response.Results = results |
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| 322 | 1 | ||
| 323 | self.logger.info("sending add node response") |
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| 324 | 1 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 325 | |||
| 326 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.DeleteNodesRequest_Encoding_DefaultBinary): |
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| 327 | 1 | self.logger.info("delete nodes request") |
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| 328 | params = struct_from_binary(ua.DeleteNodesParameters, body) |
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| 329 | 1 | ||
| 330 | 1 | results = self.session.delete_nodes(params) |
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| 331 | |||
| 332 | 1 | response = ua.DeleteNodesResponse() |
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| 333 | response.Results = results |
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| 334 | |||
| 335 | self.logger.info("sending delete node response") |
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| 336 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 337 | |||
| 338 | elif typeid == ua.NodeId(ua.ObjectIds.AddReferencesRequest_Encoding_DefaultBinary): |
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| 339 | self.logger.info("add references request") |
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| 340 | params = struct_from_binary(ua.AddReferencesParameters, body) |
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| 341 | |||
| 342 | results = self.session.add_references(params.ReferencesToAdd) |
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| 343 | |||
| 344 | 1 | response = ua.AddReferencesResponse() |
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| 345 | 1 | response.Results = results |
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| 346 | 1 | ||
| 347 | self.logger.info("sending add references response") |
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| 348 | 1 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 349 | |||
| 350 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.DeleteReferencesRequest_Encoding_DefaultBinary): |
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| 351 | 1 | self.logger.info("delete references request") |
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| 352 | params = struct_from_binary(ua.DeleteReferencesParameters, body) |
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| 353 | 1 | ||
| 354 | 1 | results = self.session.delete_references(params.ReferencesToDelete) |
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| 355 | |||
| 356 | 1 | response = ua.DeleteReferencesResponse() |
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| 357 | 1 | response.Parameters.Results = results |
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| 358 | 1 | ||
| 359 | 1 | self.logger.info("sending delete references response") |
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| 360 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 361 | 1 | ||
| 362 | 1 | ||
| 363 | elif typeid == ua.NodeId(ua.ObjectIds.CreateSubscriptionRequest_Encoding_DefaultBinary): |
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| 364 | 1 | self.logger.info("create subscription request") |
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| 365 | 1 | params = struct_from_binary(ua.CreateSubscriptionParameters, body) |
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| 366 | |||
| 367 | 1 | result = self.session.create_subscription(params, self.forward_publish_response) |
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| 368 | |||
| 369 | response = ua.CreateSubscriptionResponse() |
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| 370 | response.Parameters = result |
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| 371 | |||
| 372 | self.logger.info("sending create subscription response") |
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| 373 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 374 | |||
| 375 | elif typeid == ua.NodeId(ua.ObjectIds.ModifySubscriptionRequest_Encoding_DefaultBinary): |
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| 376 | self.logger.info("modify subscription request") |
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| 377 | params = struct_from_binary(ua.ModifySubscriptionParameters, body) |
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| 378 | 1 | ||
| 379 | 1 | result = self.session.modify_subscription(params, self.forward_publish_response) |
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| 380 | 1 | ||
| 381 | response = ua.ModifySubscriptionResponse() |
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| 382 | 1 | response.Parameters = result |
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| 383 | |||
| 384 | 1 | self.logger.info("sending modify subscription response") |
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| 385 | 1 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 386 | |||
| 387 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.DeleteSubscriptionsRequest_Encoding_DefaultBinary): |
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| 388 | 1 | self.logger.info("delete subscriptions request") |
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| 389 | params = struct_from_binary(ua.DeleteSubscriptionsParameters, body) |
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| 390 | 1 | ||
| 391 | results = self.session.delete_subscriptions(params.SubscriptionIds) |
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| 392 | |||
| 393 | response = ua.DeleteSubscriptionsResponse() |
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| 394 | response.Results = results |
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| 395 | |||
| 396 | self.logger.info("sending delte subscription response") |
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| 397 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 398 | |||
| 399 | elif typeid == ua.NodeId(ua.ObjectIds.CreateMonitoredItemsRequest_Encoding_DefaultBinary): |
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| 400 | self.logger.info("create monitored items request") |
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| 401 | params = struct_from_binary(ua.CreateMonitoredItemsParameters, body) |
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| 402 | 1 | results = self.session.create_monitored_items(params) |
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| 403 | |||
| 404 | response = ua.CreateMonitoredItemsResponse() |
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| 405 | response.Results = results |
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| 406 | |||
| 407 | self.logger.info("sending create monitored items response") |
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| 408 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 409 | |||
| 410 | elif typeid == ua.NodeId(ua.ObjectIds.ModifyMonitoredItemsRequest_Encoding_DefaultBinary): |
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| 411 | self.logger.info("modify monitored items request") |
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| 412 | params = struct_from_binary(ua.ModifyMonitoredItemsParameters, body) |
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| 413 | 1 | results = self.session.modify_monitored_items(params) |
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| 414 | |||
| 415 | response = ua.ModifyMonitoredItemsResponse() |
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| 416 | response.Results = results |
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| 417 | |||
| 418 | self.logger.info("sending modify monitored items response") |
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| 419 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 420 | |||
| 421 | elif typeid == ua.NodeId(ua.ObjectIds.DeleteMonitoredItemsRequest_Encoding_DefaultBinary): |
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| 422 | 1 | self.logger.info("delete monitored items request") |
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| 423 | 1 | params = struct_from_binary(ua.DeleteMonitoredItemsParameters, body) |
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| 424 | |||
| 425 | 1 | results = self.session.delete_monitored_items(params) |
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| 426 | |||
| 427 | response = ua.DeleteMonitoredItemsResponse() |
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| 428 | 1 | response.Results = results |
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| 429 | |||
| 430 | 1 | self.logger.info("sending delete monitored items response") |
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| 431 | 1 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 432 | 1 | ||
| 433 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.HistoryReadRequest_Encoding_DefaultBinary): |
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| 434 | 1 | self.logger.info("history read request") |
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| 435 | 1 | params = struct_from_binary(ua.HistoryReadParameters, body) |
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| 436 | 1 | ||
| 437 | results = self.session.history_read(params) |
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| 438 | |||
| 439 | 1 | response = ua.HistoryReadResponse() |
|
| 440 | 1 | response.Results = results |
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| 441 | |||
| 442 | 1 | self.logger.info("sending history read response") |
|
| 443 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 444 | |||
| 445 | elif typeid == ua.NodeId(ua.ObjectIds.RegisterNodesRequest_Encoding_DefaultBinary): |
||
| 446 | self.logger.info("register nodes request") |
||
| 447 | params = struct_from_binary(ua.RegisterNodesParameters, body) |
||
| 448 | self.logger.info("Node registration not implemented") |
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| 449 | |||
| 450 | response = ua.RegisterNodesResponse() |
||
| 451 | response.Parameters.RegisteredNodeIds = params.NodesToRegister |
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| 452 | |||
| 453 | 1 | self.logger.info("sending register nodes response") |
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| 454 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
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| 455 | |||
| 456 | elif typeid == ua.NodeId(ua.ObjectIds.UnregisterNodesRequest_Encoding_DefaultBinary): |
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| 457 | self.logger.info("unregister nodes request") |
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| 458 | params = struct_from_binary(ua.UnregisterNodesParameters, body) |
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| 459 | |||
| 460 | 1 | response = ua.UnregisterNodesResponse() |
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| 461 | 1 | ||
| 462 | self.logger.info("sending unregister nodes response") |
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| 463 | 1 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
|
| 464 | |||
| 465 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.PublishRequest_Encoding_DefaultBinary): |
|
| 466 | self.logger.info("publish request") |
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| 467 | 1 | ||
| 468 | 1 | if not self.session: |
|
| 469 | return False |
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| 470 | 1 | ||
| 471 | params = struct_from_binary(ua.PublishParameters, body) |
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| 472 | |||
| 473 | 1 | data = PublishRequestData() |
|
| 474 | 1 | data.requesthdr = requesthdr |
|
| 475 | data.seqhdr = seqhdr |
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| 476 | 1 | data.algohdr = algohdr |
|
| 477 | with self._datalock: |
||
| 478 | 1 | self._publishdata_queue.append(data) # will be used to send publish answers from server |
|
| 479 | if self._publish_result_queue: |
||
| 480 | result = self._publish_result_queue.pop(0) |
||
| 481 | self.forward_publish_response(result) |
||
| 482 | self.session.publish(params.SubscriptionAcknowledgements) |
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| 483 | 1 | self.logger.info("publish forward to server") |
|
| 484 | 1 | ||
| 485 | 1 | elif typeid == ua.NodeId(ua.ObjectIds.RepublishRequest_Encoding_DefaultBinary): |
|
| 486 | self.logger.info("re-publish request") |
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| 487 | |||
| 488 | params = struct_from_binary(ua.RepublishParameters, body) |
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| 489 | msg = self.session.republish(params) |
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| 490 | |||
| 491 | response = ua.RepublishResponse() |
||
| 492 | response.NotificationMessage = msg |
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| 493 | |||
| 494 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
||
| 495 | |||
| 496 | elif typeid == ua.NodeId(ua.ObjectIds.CloseSecureChannelRequest_Encoding_DefaultBinary): |
||
| 497 | self.logger.info("close secure channel request") |
||
| 498 | self._connection.close() |
||
| 499 | response = ua.CloseSecureChannelResponse() |
||
| 500 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
||
| 501 | return False |
||
| 502 | |||
| 503 | elif typeid == ua.NodeId(ua.ObjectIds.CallRequest_Encoding_DefaultBinary): |
||
| 504 | self.logger.info("call request") |
||
| 505 | |||
| 506 | params = struct_from_binary(ua.CallParameters, body) |
||
| 507 | |||
| 508 | results = self.session.call(params.MethodsToCall) |
||
| 509 | |||
| 510 | response = ua.CallResponse() |
||
| 511 | response.Results = results |
||
| 512 | |||
| 513 | self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response) |
||
| 514 | |||
| 515 | else: |
||
| 516 | self.logger.warning("Unknown message received %s", typeid) |
||
| 517 | raise utils.ServiceError(ua.StatusCodes.BadNotImplemented) |
||
| 518 | |||
| 519 | return True |
||
| 520 | |||
| 529 |
