int main(int argc, char *argv[]) {
UA_Client *client = UA_Client_new(UA_ClientConfig_standard, Logger_Stdout_new());
UA_StatusCode retval = UA_Client_connect(client, ClientNetworkLayerTCP_connect,
"opc.tcp://localhost:16664");
if(retval != UA_STATUSCODE_GOOD) {
UA_Client_delete(client);
return retval;
}
// Browse some objects
printf("Browsing nodes in objects folder:\n");
UA_BrowseRequest bReq;
UA_BrowseRequest_init(&bReq);
bReq.requestedMaxReferencesPerNode = 0;
bReq.nodesToBrowse = UA_BrowseDescription_new();
bReq.nodesToBrowseSize = 1;
bReq.nodesToBrowse[0].nodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER); //browse objects folder
bReq.nodesToBrowse[0].resultMask = UA_BROWSERESULTMASK_ALL; //return everything
UA_BrowseResponse bResp = UA_Client_browse(client, &bReq);
printf("%-9s %-16s %-16s %-16s\n", "NAMESPACE", "NODEID", "BROWSE NAME", "DISPLAY NAME");
for (int i = 0; i < bResp.resultsSize; ++i) {
for (int j = 0; j < bResp.results[i].referencesSize; ++j) {
UA_ReferenceDescription *ref = &(bResp.results[i].references[j]);
if(ref->nodeId.nodeId.identifierType == UA_NODEIDTYPE_NUMERIC) {
printf("%-9d %-16d %-16.*s %-16.*s\n", ref->browseName.namespaceIndex,
ref->nodeId.nodeId.identifier.numeric, ref->browseName.name.length,
ref->browseName.name.data, ref->displayName.text.length, ref->displayName.text.data);
} else if(ref->nodeId.nodeId.identifierType == UA_NODEIDTYPE_STRING) {
printf("%-9d %-16.*s %-16.*s %-16.*s\n", ref->browseName.namespaceIndex,
ref->nodeId.nodeId.identifier.string.length, ref->nodeId.nodeId.identifier.string.data,
ref->browseName.name.length, ref->browseName.name.data, ref->displayName.text.length,
ref->displayName.text.data);
}
//TODO: distinguish further types
}
}
UA_BrowseRequest_deleteMembers(&bReq);
UA_BrowseResponse_deleteMembers(&bResp);
#ifdef ENABLE_SUBSCRIPTIONS
// Create a subscription with interval 0 (immediate)...
UA_Int32 subId = UA_Client_newSubscription(client, 0);
if (subId)
printf("Create subscription succeeded, id %u\n", subId);
// .. and monitor TheAnswer
UA_NodeId monitorThis;
monitorThis = UA_NODEID_STRING_ALLOC(1, "the.answer");
UA_UInt32 monId = UA_Client_monitorItemChanges(client, subId, monitorThis, UA_ATTRIBUTEID_VALUE, &handler_TheAnswerChanged );
if (monId)
printf("Monitoring 'the.answer', id %u\n", subId);
UA_NodeId_deleteMembers(&monitorThis);
// First Publish always generates data (current value) and call out handler.
UA_Client_doPublish(client);
// This should not generate anything
UA_Client_doPublish(client);
#endif
UA_Int32 value = 0;
// Read node's value
printf("\nReading the value of node (1, \"the.answer\"):\n");
UA_ReadRequest rReq;
UA_ReadRequest_init(&rReq);
rReq.nodesToRead = UA_ReadValueId_new();
rReq.nodesToReadSize = 1;
rReq.nodesToRead[0].nodeId = UA_NODEID_STRING_ALLOC(1, "the.answer"); /* assume this node exists */
rReq.nodesToRead[0].attributeId = UA_ATTRIBUTEID_VALUE;
UA_ReadResponse rResp = UA_Client_read(client, &rReq);
if(rResp.responseHeader.serviceResult == UA_STATUSCODE_GOOD &&
rResp.resultsSize > 0 && rResp.results[0].hasValue &&
UA_Variant_isScalar(&rResp.results[0].value) &&
rResp.results[0].value.type == &UA_TYPES[UA_TYPES_INT32]) {
value = *(UA_Int32*)rResp.results[0].value.data;
printf("the value is: %i\n", value);
}
UA_ReadRequest_deleteMembers(&rReq);
UA_ReadResponse_deleteMembers(&rResp);
value++;
// Write node's value
printf("\nWriting a value of node (1, \"the.answer\"):\n");
UA_WriteRequest wReq;
UA_WriteRequest_init(&wReq);
wReq.nodesToWrite = UA_WriteValue_new();
wReq.nodesToWriteSize = 1;
wReq.nodesToWrite[0].nodeId = UA_NODEID_STRING_ALLOC(1, "the.answer"); /* assume this node exists */
wReq.nodesToWrite[0].attributeId = UA_ATTRIBUTEID_VALUE;
wReq.nodesToWrite[0].value.hasValue = UA_TRUE;
wReq.nodesToWrite[0].value.value.type = &UA_TYPES[UA_TYPES_INT32];
wReq.nodesToWrite[0].value.value.storageType = UA_VARIANT_DATA_NODELETE; //do not free the integer on deletion
wReq.nodesToWrite[0].value.value.data = &value;
UA_WriteResponse wResp = UA_Client_write(client, &wReq);
if(wResp.responseHeader.serviceResult == UA_STATUSCODE_GOOD)
printf("the new value is: %i\n", value);
UA_WriteRequest_deleteMembers(&wReq);
UA_WriteResponse_deleteMembers(&wResp);
#ifdef ENABLE_SUBSCRIPTIONS
// Take another look at the.answer... this should call the handler.
UA_Client_doPublish(client);
// Delete our subscription (which also unmonitors all items)
if(!UA_Client_removeSubscription(client, subId))
printf("Subscription removed\n");
#endif
#ifdef ENABLE_METHODCALLS
/* Note: This example requires Namespace 0 Node 11489 (ServerType -> GetMonitoredItems)
FIXME: Provide a namespace 0 independant example on the server side
*/
UA_Variant input;
UA_String argString = UA_STRING("Hello Server");
UA_Variant_init(&input);
UA_Variant_setScalarCopy(&input, &argString, &UA_TYPES[UA_TYPES_STRING]);
UA_Int32 outputSize;
UA_Variant *output;
retval = UA_Client_CallServerMethod(client, UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(1, 62541), 1, &input, &outputSize, &output);
if(retval == UA_STATUSCODE_GOOD) {
printf("Method call was successfull, and %i returned values available.\n", outputSize);
UA_Array_delete(output, &UA_TYPES[UA_TYPES_VARIANT], outputSize);
} else {
printf("Method call was unsuccessfull, and %x returned values available.\n", retval);
}
UA_Variant_deleteMembers(&input);
#endif
#ifdef ENABLE_ADDNODES
/* Create a new object type node */
// New ReferenceType
UA_AddNodesResponse *adResp = UA_Client_createReferenceTypeNode(client,
UA_EXPANDEDNODEID_NUMERIC(1, 12133), // Assign this NodeId (will fail if client is called multiple times)
UA_QUALIFIEDNAME(0, "NewReference"),
UA_LOCALIZEDTEXT("en_US", "TheNewReference"),
UA_LOCALIZEDTEXT("en_US", "References something that might or might not exist."),
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES),
(UA_UInt32) 0, (UA_UInt32) 0,
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_LOCALIZEDTEXT("en_US", "IsNewlyReferencedBy"));
if (adResp->resultsSize > 0 && adResp->results[0].statusCode == UA_STATUSCODE_GOOD ) {
printf("Created 'NewReference' with numeric NodeID %u\n", adResp->results[0].addedNodeId.identifier.numeric );
}
UA_AddNodesResponse_deleteMembers(adResp);
free(adResp);
// New ObjectType
adResp = UA_Client_createObjectTypeNode(client,
UA_EXPANDEDNODEID_NUMERIC(1, 12134), // Assign this NodeId (will fail if client is called multiple times)
UA_QUALIFIEDNAME(0, "NewObjectType"),
UA_LOCALIZEDTEXT("en_US", "TheNewObjectType"),
UA_LOCALIZEDTEXT("en_US", "Put innovative description here."),
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES),
(UA_UInt32) 0, (UA_UInt32) 0,
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER));
if (adResp->resultsSize > 0 && adResp->results[0].statusCode == UA_STATUSCODE_GOOD ) {
printf("Created 'NewObjectType' with numeric NodeID %u\n", adResp->results[0].addedNodeId.identifier.numeric );
}
// New Object
adResp = UA_Client_createObjectNode(client,
UA_EXPANDEDNODEID_NUMERIC(1, 0), // Assign new/random NodeID
UA_QUALIFIEDNAME(0, "TheNewGreatNodeBrowseName"),
UA_LOCALIZEDTEXT("en_US", "TheNewGreatNode"),
UA_LOCALIZEDTEXT("de_DE", "Hier koennte Ihre Webung stehen!"),
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES),
(UA_UInt32) 0, (UA_UInt32) 0,
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER));
if (adResp->resultsSize > 0 && adResp->results[0].statusCode == UA_STATUSCODE_GOOD ) {
printf("Created 'NewObject' with numeric NodeID %u\n", adResp->results[0].addedNodeId.identifier.numeric );
}
UA_AddNodesResponse_deleteMembers(adResp);
free(adResp);
// New Integer Variable
UA_Variant *theValue = UA_Variant_new();
UA_Int32 *theValueDate = UA_Int32_new();
*theValueDate = 1234;
theValue->type = &UA_TYPES[UA_TYPES_INT32];
theValue->data = theValueDate;
adResp = UA_Client_createVariableNode(client,
UA_EXPANDEDNODEID_NUMERIC(1, 0), // Assign new/random NodeID
UA_QUALIFIEDNAME(0, "VariableNode"),
UA_LOCALIZEDTEXT("en_US", "TheNewVariableNode"),
UA_LOCALIZEDTEXT("en_US", "This integer is just amazing - it has digits and everything."),
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES),
(UA_UInt32) 0, (UA_UInt32) 0,
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(0, UA_NS0ID_INT32),
theValue);
if (adResp->resultsSize > 0 && adResp->results[0].statusCode == UA_STATUSCODE_GOOD ) {
printf("Created 'NewVariable' with numeric NodeID %u\n", adResp->results[0].addedNodeId.identifier.numeric );
}
UA_AddNodesResponse_deleteMembers(adResp);
free(adResp);
free(theValue);
/* Done creating a new node*/
#endif
UA_Client_disconnect(client);
UA_Client_delete(client);
return UA_STATUSCODE_GOOD;
}
int main(int argc, char *argv[]) {
UA_Client *client = UA_Client_new(UA_ClientConfig_standard, Logger_Stdout_new());
UA_StatusCode retval = UA_Client_connect(client, ClientNetworkLayerTCP_connect,
"opc.tcp://localhost:16664");
if(retval != UA_STATUSCODE_GOOD) {
UA_Client_delete(client);
return retval;
}
// Browse some objects
printf("Browsing nodes in objects folder:\n");
UA_BrowseRequest bReq;
UA_BrowseRequest_init(&bReq);
bReq.requestedMaxReferencesPerNode = 0;
bReq.nodesToBrowse = UA_BrowseDescription_new();
bReq.nodesToBrowseSize = 1;
bReq.nodesToBrowse[0].nodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER); //browse objects folder
bReq.nodesToBrowse[0].resultMask = UA_BROWSERESULTMASK_ALL; //return everything
UA_BrowseResponse bResp = UA_Client_browse(client, &bReq);
printf("%-9s %-16s %-16s %-16s\n", "NAMESPACE", "NODEID", "BROWSE NAME", "DISPLAY NAME");
for (int i = 0; i < bResp.resultsSize; ++i) {
for (int j = 0; j < bResp.results[i].referencesSize; ++j) {
UA_ReferenceDescription *ref = &(bResp.results[i].references[j]);
if(ref->nodeId.nodeId.identifierType == UA_NODEIDTYPE_NUMERIC) {
printf("%-9d %-16d %-16.*s %-16.*s\n", ref->browseName.namespaceIndex,
ref->nodeId.nodeId.identifier.numeric, ref->browseName.name.length,
ref->browseName.name.data, ref->displayName.text.length, ref->displayName.text.data);
} else if(ref->nodeId.nodeId.identifierType == UA_NODEIDTYPE_STRING) {
printf("%-9d %-16.*s %-16.*s %-16.*s\n", ref->browseName.namespaceIndex,
ref->nodeId.nodeId.identifier.string.length, ref->nodeId.nodeId.identifier.string.data,
ref->browseName.name.length, ref->browseName.name.data, ref->displayName.text.length,
ref->displayName.text.data);
}
//TODO: distinguish further types
}
}
UA_BrowseRequest_deleteMembers(&bReq);
UA_BrowseResponse_deleteMembers(&bResp);
UA_Int32 value = 0;
// Read node's value
printf("\nReading the value of node (1, \"the.answer\"):\n");
UA_ReadRequest rReq;
UA_ReadRequest_init(&rReq);
rReq.nodesToRead = UA_ReadValueId_new();
rReq.nodesToReadSize = 1;
rReq.nodesToRead[0].nodeId = UA_NODEID_STRING_ALLOC(1, "the.answer"); /* assume this node exists */
rReq.nodesToRead[0].attributeId = UA_ATTRIBUTEID_VALUE;
UA_ReadResponse rResp = UA_Client_read(client, &rReq);
if(rResp.responseHeader.serviceResult == UA_STATUSCODE_GOOD &&
rResp.resultsSize > 0 && rResp.results[0].hasValue &&
UA_Variant_isScalar(&rResp.results[0].value) &&
rResp.results[0].value.type == &UA_TYPES[UA_TYPES_INT32]) {
value = *(UA_Int32*)rResp.results[0].value.data;
printf("the value is: %i\n", value);
}
UA_ReadRequest_deleteMembers(&rReq);
UA_ReadResponse_deleteMembers(&rResp);
value++;
// Write node's value
printf("\nWriting a value of node (1, \"the.answer\"):\n");
UA_WriteRequest wReq;
UA_WriteRequest_init(&wReq);
wReq.nodesToWrite = UA_WriteValue_new();
wReq.nodesToWriteSize = 1;
wReq.nodesToWrite[0].nodeId = UA_NODEID_STRING_ALLOC(1, "the.answer"); /* assume this node exists */
wReq.nodesToWrite[0].attributeId = UA_ATTRIBUTEID_VALUE;
wReq.nodesToWrite[0].value.hasValue = UA_TRUE;
wReq.nodesToWrite[0].value.value.type = &UA_TYPES[UA_TYPES_INT32];
wReq.nodesToWrite[0].value.value.storageType = UA_VARIANT_DATA_NODELETE; //do not free the integer on deletion
wReq.nodesToWrite[0].value.value.data = &value;
UA_WriteResponse wResp = UA_Client_write(client, &wReq);
if(wResp.responseHeader.serviceResult == UA_STATUSCODE_GOOD)
printf("the new value is: %i\n", value);
UA_WriteRequest_deleteMembers(&wReq);
UA_WriteResponse_deleteMembers(&wResp);
#ifdef ENABLE_ADDNODES
/* Create a new object type node */
// New ReferenceType
UA_AddNodesResponse *adResp = UA_Client_createReferenceTypeNode(client,
UA_EXPANDEDNODEID_NUMERIC(1, 12133), // Assign this NodeId (will fail if client is called multiple times)
UA_QUALIFIEDNAME(0, "NewReference"),
UA_LOCALIZEDTEXT("en_US", "TheNewReference"),
UA_LOCALIZEDTEXT("en_US", "References something that might or might not exist."),
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES),
(UA_UInt32) 0, (UA_UInt32) 0,
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_LOCALIZEDTEXT("en_US", "IsNewlyReferencedBy"));
if (adResp->resultsSize > 0 && adResp->results[0].statusCode == UA_STATUSCODE_GOOD ) {
printf("Created 'NewReference' with numeric NodeID %u\n", adResp->results[0].addedNodeId.identifier.numeric );
}
UA_AddNodesResponse_deleteMembers(adResp);
free(adResp);
// New ObjectType
adResp = UA_Client_createObjectTypeNode(client,
UA_EXPANDEDNODEID_NUMERIC(1, 12134), // Assign this NodeId (will fail if client is called multiple times)
UA_QUALIFIEDNAME(0, "NewObjectType"),
UA_LOCALIZEDTEXT("en_US", "TheNewObjectType"),
UA_LOCALIZEDTEXT("en_US", "Put innovative description here."),
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES),
(UA_UInt32) 0, (UA_UInt32) 0,
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER));
if (adResp->resultsSize > 0 && adResp->results[0].statusCode == UA_STATUSCODE_GOOD ) {
printf("Created 'NewObjectType' with numeric NodeID %u\n", adResp->results[0].addedNodeId.identifier.numeric );
}
// New Object
adResp = UA_Client_createObjectNode(client,
UA_EXPANDEDNODEID_NUMERIC(1, 0), // Assign new/random NodeID
UA_QUALIFIEDNAME(0, "TheNewGreatNodeBrowseName"),
UA_LOCALIZEDTEXT("en_US", "TheNewGreatNode"),
UA_LOCALIZEDTEXT("de_DE", "Hier koennte Ihre Webung stehen!"),
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES),
(UA_UInt32) 0, (UA_UInt32) 0,
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER));
if (adResp->resultsSize > 0 && adResp->results[0].statusCode == UA_STATUSCODE_GOOD ) {
printf("Created 'NewObject' with numeric NodeID %u\n", adResp->results[0].addedNodeId.identifier.numeric );
}
UA_AddNodesResponse_deleteMembers(adResp);
free(adResp);
// New Integer Variable
UA_Variant *theValue = UA_Variant_new();
UA_Int32 *theValueDate = UA_Int32_new();
*theValueDate = 1234;
theValue->type = &UA_TYPES[UA_TYPES_INT32];
theValue->data = theValueDate;
adResp = UA_Client_createVariableNode(client,
UA_EXPANDEDNODEID_NUMERIC(1, 0), // Assign new/random NodeID
UA_QUALIFIEDNAME(0, "VariableNode"),
UA_LOCALIZEDTEXT("en_US", "TheNewVariableNode"),
UA_LOCALIZEDTEXT("en_US", "This integer is just amazing - it has digits and everything."),
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES),
(UA_UInt32) 0, (UA_UInt32) 0,
UA_EXPANDEDNODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
UA_NODEID_NUMERIC(0, UA_NS0ID_INT32),
theValue);
if (adResp->resultsSize > 0 && adResp->results[0].statusCode == UA_STATUSCODE_GOOD ) {
printf("Created 'NewVariable' with numeric NodeID %u\n", adResp->results[0].addedNodeId.identifier.numeric );
}
UA_AddNodesResponse_deleteMembers(adResp);
free(adResp);
free(theValue);
/* Done creating a new node*/
#endif
UA_Client_disconnect(client);
UA_Client_delete(client);
return UA_STATUSCODE_GOOD;
}