/* This work is licensed under a Creative Commons CCZero 1.0 Universal License. * See http://creativecommons.org/publicdomain/zero/1.0/ for more information. */ /* * A simple server instance which registers with the discovery server (see server_lds.c). * Before shutdown it has to unregister itself. */ #include "open62541.h" #include #define DISCOVERY_SERVER_ENDPOINT "opc.tcp://localhost:4840" UA_Boolean running = true; static void stopHandler(int sign) { UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "received ctrl-c"); running = false; } static UA_StatusCode readInteger(UA_Server *server, const UA_NodeId *sessionId, void *sessionContext, const UA_NodeId *nodeId, void *nodeContext, UA_Boolean includeSourceTimeStamp, const UA_NumericRange *range, UA_DataValue *value) { UA_Int32 *myInteger = (UA_Int32*)nodeContext; value->hasValue = true; UA_Variant_setScalarCopy(&value->value, myInteger, &UA_TYPES[UA_TYPES_INT32]); // we know the nodeid is a string UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, "Node read %.*s", (int)nodeId->identifier.string.length, nodeId->identifier.string.data); UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, "read value %i", *(UA_UInt32 *)myInteger); return UA_STATUSCODE_GOOD; } static UA_StatusCode writeInteger(UA_Server *server, const UA_NodeId *sessionId, void *sessionContext, const UA_NodeId *nodeId, void *nodeContext, const UA_NumericRange *range, const UA_DataValue *value) { UA_Int32 *myInteger = (UA_Int32*)nodeContext; if(value->hasValue && UA_Variant_isScalar(&value->value) && value->value.type == &UA_TYPES[UA_TYPES_INT32] && value->value.data) *myInteger = *(UA_Int32 *)value->value.data; // we know the nodeid is a string UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, "Node written %.*s", (int)nodeId->identifier.string.length, nodeId->identifier.string.data); UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, "written value %i", *(UA_UInt32 *)myInteger); return UA_STATUSCODE_GOOD; } int main(int argc, char **argv) { signal(SIGINT, stopHandler); /* catches ctrl-c */ signal(SIGTERM, stopHandler); UA_ServerConfig *config = UA_ServerConfig_new_default(); UA_String_clear(&config->applicationDescription.applicationUri); config->applicationDescription.applicationUri = UA_String_fromChars("urn:open62541.example.server_register"); config->mdnsServerName = UA_String_fromChars("Sample Server"); // See http://www.opcfoundation.org/UA/schemas/1.03/ServerCapabilities.csv //config.serverCapabilitiesSize = 1; //UA_String caps = UA_String_fromChars("LDS"); //config.serverCapabilities = ∩︀ UA_Server *server = UA_Server_new(config); /* add a variable node to the address space */ UA_Int32 myInteger = 42; UA_NodeId myIntegerNodeId = UA_NODEID_STRING(1, "the.answer"); UA_QualifiedName myIntegerName = UA_QUALIFIEDNAME(1, "the answer"); UA_DataSource dateDataSource; dateDataSource.read = readInteger; dateDataSource.write = writeInteger; UA_VariableAttributes attr = UA_VariableAttributes_default; attr.description = UA_LOCALIZEDTEXT("en-US", "the answer"); attr.displayName = UA_LOCALIZEDTEXT("en-US", "the answer"); UA_Server_addDataSourceVariableNode(server, myIntegerNodeId, UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER), UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES), myIntegerName, UA_NODEID_NULL, attr, dateDataSource, &myInteger, NULL); UA_Client *clientRegister = UA_Client_new(UA_ClientConfig_default); // periodic server register after 10 Minutes, delay first register for 500ms UA_StatusCode retval = UA_Server_addPeriodicServerRegisterCallback(server, clientRegister, DISCOVERY_SERVER_ENDPOINT, 10 * 60 * 1000, 500, NULL); // UA_StatusCode retval = UA_Server_addPeriodicServerRegisterJob(server, // "opc.tcp://localhost:4840", 10*60*1000, 500, NULL); if(retval != UA_STATUSCODE_GOOD) { UA_LOG_ERROR(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "Could not create periodic job for server register. StatusCode %s", UA_StatusCode_name(retval)); UA_Client_disconnect(clientRegister); UA_Client_delete(clientRegister); UA_Server_delete(server); UA_ServerConfig_delete(config); return (int)retval; } retval = UA_Server_run(server, &running); if(retval != UA_STATUSCODE_GOOD) { UA_LOG_ERROR(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "Could not start the server. StatusCode %s", UA_StatusCode_name(retval)); UA_Client_disconnect(clientRegister); UA_Client_delete(clientRegister); UA_Server_delete(server); UA_ServerConfig_delete(config); return (int)retval; } // UNregister the server from the discovery server. retval = UA_Server_unregister_discovery(server, clientRegister); //retval = UA_Server_unregister_discovery(server, "opc.tcp://localhost:4840" ); if(retval != UA_STATUSCODE_GOOD) UA_LOG_ERROR(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "Could not unregister server from discovery server. StatusCode %s", UA_StatusCode_name(retval)); UA_Client_disconnect(clientRegister); UA_Client_delete(clientRegister); UA_Server_delete(server); UA_ServerConfig_delete(config); return (int)retval; }