open62541/examples/discovery/server_lds.c

/* This work is licensed under a Creative Commons CCZero 1.0 Universal License.
 * See http://creativecommons.org/publicdomain/zero/1.0/ for more information. */
/*
 * Server representing a local discovery server as a central instance.
 * Any other server can register with this server (see server_register.c). Clients can then call the
 * find servers service to get all registered servers (see client_find_servers.c).
 */

#include <stdio.h>
#include <signal.h>
#include "open62541.h"

UA_Boolean running = true;
static void stopHandler(int sig) {
    running = false;
}

int main(void) {
    signal(SIGINT, stopHandler);
    signal(SIGTERM, stopHandler);

    UA_ServerConfig config = UA_ServerConfig_standard;
    config.applicationDescription.applicationType = UA_APPLICATIONTYPE_DISCOVERYSERVER;
    config.applicationDescription.applicationUri =
            UA_String_fromChars("urn:open62541.example.local_discovery_server");
    config.mdnsServerName = UA_String_fromChars("LDS");
    // See http://www.opcfoundation.org/UA/schemas/1.03/ServerCapabilities.csv
    config.serverCapabilitiesSize = 1;
    UA_String *caps = UA_String_new();
    *caps = UA_String_fromChars("LDS");
    config.serverCapabilities = caps;
    /* timeout in seconds when to automatically remove a registered server from
     * the list, if it doesn't re-register within the given time frame. A value
     * of 0 disables automatic removal. Default is 60 Minutes (60*60). Must be
     * bigger than 10 seconds, because cleanup is only triggered approximately
     * ervery 10 seconds. The server will still be removed depending on the
     * state of the semaphore file. */
    // config.discoveryCleanupTimeout = 60*60;
    UA_ServerNetworkLayer nl = UA_ServerNetworkLayerTCP(UA_ConnectionConfig_standard, 4840);
    config.networkLayers = &nl;
    config.networkLayersSize = 1;
    UA_Server *server = UA_Server_new(config);

    UA_StatusCode retval = UA_Server_run(server, &running);
    UA_String_deleteMembers(&config.applicationDescription.applicationUri);
    UA_Array_delete(config.serverCapabilities, config.serverCapabilitiesSize, &UA_TYPES[UA_TYPES_STRING]);
    UA_String_deleteMembers(&config.mdnsServerName);
    UA_Server_delete(server);
    nl.deleteMembers(&nl);
    return (int) retval;
}