/* The request/response are casted to the header (first element of their struct) */ static void invoke_service(UA_Server *server, UA_SecureChannel *channel, UA_UInt32 requestId, UA_RequestHeader *request, const UA_DataType *responseType, void (*service)(UA_Server*, UA_Session*, void*, void*)) { UA_ResponseHeader *response = UA_alloca(responseType->memSize); UA_init(response, responseType); init_response_header(request, response); /* try to get the session from the securechannel first */ UA_Session *session = UA_SecureChannel_getSession(channel, &request->authenticationToken); if(!session) session = UA_SessionManager_getSession(&server->sessionManager, &request->authenticationToken); if(!session) response->serviceResult = UA_STATUSCODE_BADSESSIONIDINVALID; else if(session->activated == UA_FALSE) { response->serviceResult = UA_STATUSCODE_BADSESSIONNOTACTIVATED; /* the session is invalidated FIXME: do this delayed*/ UA_SessionManager_removeSession(&server->sessionManager, &request->authenticationToken); } else if(session->channel != channel) { response->serviceResult = UA_STATUSCODE_BADSESSIONIDINVALID; } else { UA_Session_updateLifetime(session); service(server, session, request, response); } UA_SecureChannel_sendBinaryMessage(channel, requestId, response, responseType); UA_deleteMembers(response, responseType); }
static void sendError(UA_SecureChannel *channel, const UA_ByteString *msg, size_t offset, const UA_DataType *responseType, UA_UInt32 requestId, UA_StatusCode error) { UA_RequestHeader requestHeader; UA_StatusCode retval = UA_RequestHeader_decodeBinary(msg, &offset, &requestHeader); if(retval != UA_STATUSCODE_GOOD) return; void *response = UA_alloca(responseType->memSize); UA_init(response, responseType); UA_ResponseHeader *responseHeader = (UA_ResponseHeader*)response; responseHeader->requestHandle = requestHeader.requestHandle; responseHeader->timestamp = UA_DateTime_now(); responseHeader->serviceResult = error; UA_SecureChannel_sendBinaryMessage(channel, requestId, response, responseType); UA_RequestHeader_deleteMembers(&requestHeader); UA_ResponseHeader_deleteMembers(responseHeader); }
static void variables_basic(void) { /* Int32 */ UA_Int32 i = 5; UA_Int32 j; UA_Int32_copy(&i, &j); UA_Int32 *ip = UA_Int32_new(); UA_Int32_copy(&i, ip); UA_Int32_delete(ip); /* String */ UA_String s; UA_String_init(&s); /* _init zeroes out the entire memory of the datatype */ char *test = "test"; s.length = strlen(test); s.data = (UA_Byte*)test; UA_String s2; UA_String_copy(&s, &s2); UA_String_deleteMembers(&s2); /* Copying heap-allocated the dynamic content */ UA_String s3 = UA_STRING("test2"); UA_String s4 = UA_STRING_ALLOC("test2"); /* Copies the content to the heap */ UA_Boolean eq = UA_String_equal(&s3, &s4); UA_String_deleteMembers(&s4); if(!eq) return; /* Structured Type */ UA_ReadRequest rr; UA_init(&rr, &UA_TYPES[UA_TYPES_READREQUEST]); /* Generic method */ UA_ReadRequest_init(&rr); /* Shorthand for the previous line */ rr.requestHeader.timestamp = UA_DateTime_now(); /* Members of a structure */ rr.nodesToRead = (UA_ReadValueId *)UA_Array_new(5, &UA_TYPES[UA_TYPES_READVALUEID]); rr.nodesToReadSize = 5; /* Array size needs to be made known */ UA_ReadRequest *rr2 = UA_ReadRequest_new(); UA_copy(&rr, rr2, &UA_TYPES[UA_TYPES_READREQUEST]); UA_ReadRequest_deleteMembers(&rr); UA_ReadRequest_delete(rr2); }
/* The request/response are casted to the header (first element of their struct) */ static void invoke_service(UA_Server *server, UA_SecureChannel *channel, UA_UInt32 requestId, UA_RequestHeader *request, const UA_DataType *responseType, void (*service)(UA_Server*, UA_Session*, void*, void*)) { UA_ResponseHeader *response = UA_alloca(responseType->memSize); UA_init(response, responseType); init_response_header(request, response); /* try to get the session from the securechannel first */ UA_Session *session = UA_SecureChannel_getSession(channel, &request->authenticationToken); #ifdef EXTENSION_STATELESS if(request->authenticationToken.namespaceIndex == 0 && request->authenticationToken.identifierType == UA_NODEIDTYPE_NUMERIC && request->authenticationToken.identifier.numeric == 0 && (responseType->typeIndex == UA_TYPES_READRESPONSE || responseType->typeIndex == UA_TYPES_WRITERESPONSE || responseType->typeIndex == UA_TYPES_BROWSERESPONSE) ){ session = &anonymousSession; service(server, session, request, response); }else{ #endif if(!session || session->channel != channel) { response->serviceResult = UA_STATUSCODE_BADSESSIONIDINVALID; } else if(session->activated == UA_FALSE) { response->serviceResult = UA_STATUSCODE_BADSESSIONNOTACTIVATED; /* /\* the session is invalidated FIXME: do this delayed*\/ */ /* UA_SessionManager_removeSession(&server->sessionManager, server, &request->authenticationToken); */ } else { UA_Session_updateLifetime(session); service(server, session, request, response); } #ifdef EXTENSION_STATELESS } #endif UA_StatusCode retval = UA_SecureChannel_sendBinaryMessage(channel, requestId, response, responseType); if(retval != UA_STATUSCODE_GOOD) { if(retval == UA_STATUSCODE_BADENCODINGLIMITSEXCEEDED) response->serviceResult = UA_STATUSCODE_BADRESPONSETOOLARGE; else response->serviceResult = retval; UA_SecureChannel_sendBinaryMessage(channel, requestId, response, &UA_TYPES[UA_TYPES_SERVICEFAULT]); } UA_deleteMembers(response, responseType); }
void __UA_Client_Service(UA_Client *client, const void *r, const UA_DataType *requestType, void *response, const UA_DataType *responseType) { /* Requests always begin witih a RequestHeader, therefore we can cast. */ UA_RequestHeader *request = (void*)(uintptr_t)r; UA_StatusCode retval = UA_STATUSCODE_GOOD; UA_init(response, responseType); UA_ResponseHeader *respHeader = (UA_ResponseHeader*)response; /* make sure we have a valid session */ retval = UA_Client_manuallyRenewSecureChannel(client); if(retval != UA_STATUSCODE_GOOD) { respHeader->serviceResult = retval; client->state = UA_CLIENTSTATE_ERRORED; return; } /* handling request parameters */ UA_NodeId_copy(&client->authenticationToken, &request->authenticationToken); request->timestamp = UA_DateTime_now(); request->requestHandle = ++client->requestHandle; /* Send the request */ UA_UInt32 requestId = ++client->requestId; UA_LOG_DEBUG(client->logger, UA_LOGCATEGORY_CLIENT, "Sending a request of type %i", requestType->typeId.identifier.numeric); retval = UA_SecureChannel_sendBinaryMessage(&client->channel, requestId, request, requestType); if(retval) { if(retval == UA_STATUSCODE_BADENCODINGLIMITSEXCEEDED) respHeader->serviceResult = UA_STATUSCODE_BADREQUESTTOOLARGE; else respHeader->serviceResult = retval; client->state = UA_CLIENTSTATE_ERRORED; return; } /* Retrieve the response */ // Todo: push this into the generic securechannel implementation for client and server UA_ByteString reply; UA_ByteString_init(&reply); do { retval = client->connection.recv(&client->connection, &reply, client->config.timeout); if(retval != UA_STATUSCODE_GOOD) { respHeader->serviceResult = retval; client->state = UA_CLIENTSTATE_ERRORED; return; } } while(!reply.data); size_t offset = 0; UA_SecureConversationMessageHeader msgHeader; retval |= UA_SecureConversationMessageHeader_decodeBinary(&reply, &offset, &msgHeader); UA_SymmetricAlgorithmSecurityHeader symHeader; retval |= UA_SymmetricAlgorithmSecurityHeader_decodeBinary(&reply, &offset, &symHeader); UA_SequenceHeader seqHeader; retval |= UA_SequenceHeader_decodeBinary(&reply, &offset, &seqHeader); UA_NodeId responseId; retval |= UA_NodeId_decodeBinary(&reply, &offset, &responseId); UA_NodeId expectedNodeId = UA_NODEID_NUMERIC(0, responseType->typeId.identifier.numeric + UA_ENCODINGOFFSET_BINARY); if(retval != UA_STATUSCODE_GOOD) { goto finish; } /* Todo: we need to demux responses since a publish responses may come at any time */ if(!UA_NodeId_equal(&responseId, &expectedNodeId) || seqHeader.requestId != requestId) { if(responseId.identifier.numeric != UA_NS0ID_SERVICEFAULT + UA_ENCODINGOFFSET_BINARY) { UA_LOG_ERROR(client->logger, UA_LOGCATEGORY_CLIENT, "Reply answers the wrong request. Expected ns=%i,i=%i. But retrieved ns=%i,i=%i", expectedNodeId.namespaceIndex, expectedNodeId.identifier.numeric, responseId.namespaceIndex, responseId.identifier.numeric); respHeader->serviceResult = UA_STATUSCODE_BADINTERNALERROR; } else retval = UA_decodeBinary(&reply, &offset, respHeader, &UA_TYPES[UA_TYPES_SERVICEFAULT]); goto finish; } retval = UA_decodeBinary(&reply, &offset, response, responseType); if(retval == UA_STATUSCODE_BADENCODINGLIMITSEXCEEDED) retval = UA_STATUSCODE_BADRESPONSETOOLARGE; finish: UA_SymmetricAlgorithmSecurityHeader_deleteMembers(&symHeader); UA_ByteString_deleteMembers(&reply); if(retval != UA_STATUSCODE_GOOD){ UA_LOG_INFO(client->logger, UA_LOGCATEGORY_CLIENT, "Error receiving the response"); client->state = UA_CLIENTSTATE_ERRORED; respHeader->serviceResult = retval; } UA_LOG_DEBUG(client->logger, UA_LOGCATEGORY_CLIENT, "Received a response of type %i", responseId.identifier.numeric); }
static void processMSG(UA_Server *server, UA_SecureChannel *channel, UA_UInt32 requestId, const UA_ByteString *msg) { /* At 0, the nodeid starts... */ size_t ppos = 0; size_t *offset = &ppos; /* Decode the nodeid */ UA_NodeId requestTypeId; UA_StatusCode retval = UA_NodeId_decodeBinary(msg, offset, &requestTypeId); if(retval != UA_STATUSCODE_GOOD) return; if(requestTypeId.identifierType != UA_NODEIDTYPE_NUMERIC) UA_NodeId_deleteMembers(&requestTypeId); /* leads to badserviceunsupported */ /* Store the start-position of the request */ size_t requestPos = *offset; /* Get the service pointers */ UA_Service service = NULL; const UA_DataType *requestType = NULL; const UA_DataType *responseType = NULL; UA_Boolean sessionRequired = true; getServicePointers(requestTypeId.identifier.numeric, &requestType, &responseType, &service, &sessionRequired); if(!requestType) { if(requestTypeId.identifier.numeric == 787) { UA_LOG_INFO_CHANNEL(server->config.logger, channel, "Client requested a subscription, " \ "but those are not enabled in the build"); } else { UA_LOG_INFO_CHANNEL(server->config.logger, channel, "Unknown request %i", requestTypeId.identifier.numeric); } sendError(channel, msg, requestPos, &UA_TYPES[UA_TYPES_SERVICEFAULT], requestId, UA_STATUSCODE_BADSERVICEUNSUPPORTED); return; } UA_assert(responseType); #ifdef UA_ENABLE_NONSTANDARD_STATELESS /* Stateless extension: Sessions are optional */ sessionRequired = false; #endif /* Decode the request */ void *request = UA_alloca(requestType->memSize); UA_RequestHeader *requestHeader = (UA_RequestHeader*)request; retval = UA_decodeBinary(msg, offset, request, requestType); if(retval != UA_STATUSCODE_GOOD) { UA_LOG_DEBUG_CHANNEL(server->config.logger, channel, "Could not decode the request"); sendError(channel, msg, requestPos, responseType, requestId, retval); return; } /* Prepare the respone */ void *response = UA_alloca(responseType->memSize); UA_init(response, responseType); UA_Session *session = NULL; /* must be initialized before goto send_response */ /* CreateSession doesn't need a session */ if(requestType == &UA_TYPES[UA_TYPES_CREATESESSIONREQUEST]) { Service_CreateSession(server, channel, request, response); goto send_response; } /* Find the matching session */ session = UA_SecureChannel_getSession(channel, &requestHeader->authenticationToken); if(!session) session = UA_SessionManager_getSession(&server->sessionManager, &requestHeader->authenticationToken); if(requestType == &UA_TYPES[UA_TYPES_ACTIVATESESSIONREQUEST]) { if(!session) { UA_LOG_DEBUG_CHANNEL(server->config.logger, channel, "Trying to activate a session that is " \ "not known in the server"); sendError(channel, msg, requestPos, responseType, requestId, UA_STATUSCODE_BADSESSIONIDINVALID); UA_deleteMembers(request, requestType); return; } Service_ActivateSession(server, channel, session, request, response); goto send_response; } /* Set an anonymous, inactive session for services that need no session */ UA_Session anonymousSession; if(!session) { if(sessionRequired) { UA_LOG_INFO_CHANNEL(server->config.logger, channel, "Service request %i without a valid session", requestType->binaryEncodingId); sendError(channel, msg, requestPos, responseType, requestId, UA_STATUSCODE_BADSESSIONIDINVALID); UA_deleteMembers(request, requestType); return; } UA_Session_init(&anonymousSession); anonymousSession.sessionId = UA_NODEID_GUID(0, UA_GUID_NULL); anonymousSession.channel = channel; session = &anonymousSession; } /* Trying to use a non-activated session? */ if(sessionRequired && !session->activated) { UA_LOG_INFO_SESSION(server->config.logger, session, "Calling service %i on a non-activated session", requestType->binaryEncodingId); sendError(channel, msg, requestPos, responseType, requestId, UA_STATUSCODE_BADSESSIONNOTACTIVATED); UA_SessionManager_removeSession(&server->sessionManager, &session->authenticationToken); UA_deleteMembers(request, requestType); return; } /* The session is bound to another channel */ if(session->channel != channel) { UA_LOG_DEBUG_CHANNEL(server->config.logger, channel, "Client tries to use an obsolete securechannel"); sendError(channel, msg, requestPos, responseType, requestId, UA_STATUSCODE_BADSECURECHANNELIDINVALID); UA_deleteMembers(request, requestType); return; } /* Update the session lifetime */ UA_Session_updateLifetime(session); #ifdef UA_ENABLE_SUBSCRIPTIONS /* The publish request is not answered immediately */ if(requestType == &UA_TYPES[UA_TYPES_PUBLISHREQUEST]) { Service_Publish(server, session, request, requestId); UA_deleteMembers(request, requestType); return; } #endif /* Call the service */ UA_assert(service); /* For all services besides publish, the service pointer is non-NULL*/ service(server, session, request, response); send_response: /* Send the response */ ((UA_ResponseHeader*)response)->requestHandle = requestHeader->requestHandle; ((UA_ResponseHeader*)response)->timestamp = UA_DateTime_now(); retval = UA_SecureChannel_sendBinaryMessage(channel, requestId, response, responseType); if(retval != UA_STATUSCODE_GOOD) UA_LOG_INFO_CHANNEL(server->config.logger, channel, "Could not send the message over " "the SecureChannel with error code 0x%08x", retval); /* Clean up */ UA_deleteMembers(request, requestType); UA_deleteMembers(response, responseType); }
static void processMSG(UA_Connection *connection, UA_Server *server, const UA_ByteString *msg, size_t *pos) { /* If we cannot decode these, don't respond */ UA_UInt32 secureChannelId = 0; UA_UInt32 tokenId = 0; UA_SequenceHeader sequenceHeader; UA_NodeId requestTypeId; UA_StatusCode retval = UA_UInt32_decodeBinary(msg, pos, &secureChannelId); retval |= UA_UInt32_decodeBinary(msg, pos, &tokenId); retval |= UA_SequenceHeader_decodeBinary(msg, pos, &sequenceHeader); retval = UA_NodeId_decodeBinary(msg, pos, &requestTypeId); if(retval != UA_STATUSCODE_GOOD) return; UA_SecureChannel *channel = connection->channel; UA_SecureChannel anonymousChannel; if(!channel) { UA_SecureChannel_init(&anonymousChannel); anonymousChannel.connection = connection; channel = &anonymousChannel; } /* Test if the secure channel is ok */ if(secureChannelId != channel->securityToken.channelId) return; if(tokenId != channel->securityToken.tokenId) { if(tokenId != channel->nextSecurityToken.tokenId) { /* close the securechannel but keep the connection open */ UA_LOG_INFO(server->logger, UA_LOGCATEGORY_SECURECHANNEL, "Request with a wrong security token. Closing the SecureChannel %i.", channel->securityToken.channelId); Service_CloseSecureChannel(server, channel->securityToken.channelId); return; } UA_SecureChannel_revolveTokens(channel); } /* Test if the service type nodeid has the right format */ if(requestTypeId.identifierType != UA_NODEIDTYPE_NUMERIC || requestTypeId.namespaceIndex != 0) { UA_NodeId_deleteMembers(&requestTypeId); sendError(channel, msg, *pos, sequenceHeader.requestId, UA_STATUSCODE_BADSERVICEUNSUPPORTED); return; } /* Get the service pointers */ UA_Service service = NULL; const UA_DataType *requestType = NULL; const UA_DataType *responseType = NULL; getServicePointers(requestTypeId.identifier.numeric, &requestType, &responseType, &service); if(!service) { /* The service is not supported */ if(requestTypeId.identifier.numeric==787) UA_LOG_INFO(server->logger, UA_LOGCATEGORY_SERVER, "Client requested a subscription that are not supported, " "the message will be skipped"); else UA_LOG_INFO(server->logger, UA_LOGCATEGORY_SERVER, "Unknown request: NodeId(ns=%d, i=%d)", requestTypeId.namespaceIndex, requestTypeId.identifier.numeric); sendError(channel, msg, *pos, sequenceHeader.requestId, UA_STATUSCODE_BADSERVICEUNSUPPORTED); return; } /* Most services can only be called with a valid securechannel */ #ifndef EXTENSION_STATELESS if(channel == &anonymousChannel && requestType->typeIndex > UA_TYPES_OPENSECURECHANNELREQUEST) { sendError(channel, msg, *pos, sequenceHeader.requestId, UA_STATUSCODE_BADSECURECHANNELIDINVALID); return; } #endif /* Decode the request */ void *request = UA_alloca(requestType->memSize); size_t oldpos = *pos; retval = UA_decodeBinary(msg, pos, request, requestType); if(retval != UA_STATUSCODE_GOOD) { sendError(channel, msg, oldpos, sequenceHeader.requestId, retval); return; } /* Find the matching session */ UA_Session *session = UA_SecureChannel_getSession(channel, &((UA_RequestHeader*)request)->authenticationToken); UA_Session anonymousSession; if(!session) { UA_Session_init(&anonymousSession); anonymousSession.channel = channel; anonymousSession.activated = UA_TRUE; session = &anonymousSession; } /* Test if the session is valid */ if(!session->activated && requestType->typeIndex != UA_TYPES_ACTIVATESESSIONREQUEST) { UA_LOG_INFO(server->logger, UA_LOGCATEGORY_SERVER, "Client tries to call a service with a non-activated session"); sendError(channel, msg, *pos, sequenceHeader.requestId, UA_STATUSCODE_BADSESSIONNOTACTIVATED); return; } #ifndef EXTENSION_STATELESS if(session == &anonymousSession && requestType->typeIndex > UA_TYPES_ACTIVATESESSIONREQUEST) { UA_LOG_INFO(server->logger, UA_LOGCATEGORY_SERVER, "Client tries to call a service without a session"); sendError(channel, msg, *pos, sequenceHeader.requestId, UA_STATUSCODE_BADSESSIONIDINVALID); return; } #endif /* Call the service */ UA_Session_updateLifetime(session); void *response = UA_alloca(responseType->memSize); UA_init(response, responseType); init_response_header(request, response); service(server, session, request, response); /* Send the response */ retval = UA_SecureChannel_sendBinaryMessage(channel, sequenceHeader.requestId, response, responseType); if(retval != UA_STATUSCODE_GOOD) { /* e.g. UA_STATUSCODE_BADENCODINGLIMITSEXCEEDED */ sendError(channel, msg, oldpos, sequenceHeader.requestId, retval); } /* Clean up */ UA_deleteMembers(request, requestType); UA_deleteMembers(response, responseType); return; }