server.cpp

/*
 * This work is licensed under a Creative Commons CCZero 1.0 Universal License.
 * See http://creativecommons.org/publicdomain/zero/1.0/ for more information.
 */

#include <signal.h>
#include <iostream>
#include <cstring>

#ifdef UA_NO_AMALGAMATION
# include "ua_server.h"
# include "logger_stdout.h"
# include "networklayer_tcp.h"
#else
# include "open62541.h"
#endif

/**
 * Build Instructions (Linux)
 * - gcc -std=c99 -c open62541.c
 * - g++ server.cpp open62541.o -o server
 */

using namespace std;

UA_Boolean running = UA_TRUE;
UA_Logger logger = Logger_Stdout;

static void stopHandler(int sign) {
    UA_LOG_INFO(logger, UA_LOGCATEGORY_SERVER, "received ctrl-c");
    running = 0;
}

int main() {
    signal(SIGINT, stopHandler); /* catches ctrl-c */

    UA_ServerConfig config = UA_ServerConfig_standard;
    UA_ServerNetworkLayer nl = UA_ServerNetworkLayerTCP(UA_ConnectionConfig_standard, 16664);
    config.logger = Logger_Stdout;
    config.networkLayers = &nl;
    config.networkLayersSize = 1;
    UA_Server *server = UA_Server_new(config);

    // add a variable node to the adresspace
    UA_VariableAttributes attr;
    UA_VariableAttributes_init(&attr);
    UA_Int32 myInteger = 42;
    UA_Variant_setScalarCopy(&attr.value, &myInteger, &UA_TYPES[UA_TYPES_INT32]);
    attr.description = UA_LOCALIZEDTEXT_ALLOC("en_US","the answer");
    attr.displayName = UA_LOCALIZEDTEXT_ALLOC("en_US","the answer");
    UA_NodeId myIntegerNodeId = UA_NODEID_STRING_ALLOC(1, "the.answer");
    UA_QualifiedName myIntegerName = UA_QUALIFIEDNAME_ALLOC(1, "the answer");
    UA_NodeId parentNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER);
    UA_NodeId parentReferenceNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES);
    UA_Server_addVariableNode(server, myIntegerNodeId, parentNodeId,
                              parentReferenceNodeId, myIntegerName,
                              UA_NODEID_NULL, attr, NULL, NULL);

    /* allocations on the heap need to be freed */
    UA_VariableAttributes_deleteMembers(&attr);
    UA_NodeId_deleteMembers(&myIntegerNodeId);
    UA_QualifiedName_deleteMembers(&myIntegerName);

    UA_StatusCode retval = UA_Server_run(server, &running);
	UA_Server_delete(server);
    nl.deleteMembers(&nl);

	return retval;
}