67 lines
2.8 KiB
C
67 lines
2.8 KiB
C
/* This work is licensed under a Creative Commons CCZero 1.0 Universal License.
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* See http://creativecommons.org/publicdomain/zero/1.0/ for more information. */
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/*
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* Server representing a local discovery server as a central instance.
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* Any other server can register with this server (see server_register.c). Clients can then call the
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* find servers service to get all registered servers (see client_find_servers.c).
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*/
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#include <open62541/server.h>
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#include <open62541/server_config_default.h>
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#include <signal.h>
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#include <stdlib.h>
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UA_Boolean running = true;
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static void stopHandler(int sig) {
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running = false;
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}
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int main(void) {
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signal(SIGINT, stopHandler);
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signal(SIGTERM, stopHandler);
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UA_Server *server = UA_Server_new();
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UA_ServerConfig *config = UA_Server_getConfig(server);
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UA_ServerConfig_setDefault(config);
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// This is an LDS server only. Set the application type to DISCOVERYSERVER.
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// NOTE: This will cause UaExpert to not show this instance in the server list.
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// See also: https://forum.unified-automation.com/topic1987.html
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config->applicationDescription.applicationType = UA_APPLICATIONTYPE_DISCOVERYSERVER;
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UA_String_clear(&config->applicationDescription.applicationUri);
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config->applicationDescription.applicationUri =
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UA_String_fromChars("urn:open62541.example.local_discovery_server");
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// Enable the mDNS announce and response functionality
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config->mdnsEnabled = true;
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config->mdnsConfig.mdnsServerName = UA_String_fromChars("LDS");
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// See http://www.opcfoundation.org/UA/schemas/1.03/ServerCapabilities.csv
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// For a LDS server, you should only indicate the LDS capability.
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// If this instance is an LDS and at the same time a normal OPC UA server, you also have to indicate
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// the additional capabilities.
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// NOTE: UaExpert does not show LDS-only servers in the list.
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// See also: https://forum.unified-automation.com/topic1987.html
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// E.g. here we only set LDS, and you will not see it in UaExpert
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config->mdnsConfig.serverCapabilitiesSize = 1;
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UA_String *caps = (UA_String *) UA_Array_new(1, &UA_TYPES[UA_TYPES_STRING]);
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caps[0] = UA_String_fromChars("LDS");
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config->mdnsConfig.serverCapabilities = caps;
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/* timeout in seconds when to automatically remove a registered server from
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* the list, if it doesn't re-register within the given time frame. A value
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* of 0 disables automatic removal. Default is 60 Minutes (60*60). Must be
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* bigger than 10 seconds, because cleanup is only triggered approximately
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* every 10 seconds. The server will still be removed depending on the
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* state of the semaphore file. */
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// config->discoveryCleanupTimeout = 60*60;
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UA_StatusCode retval = UA_Server_run(server, &running);
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UA_Server_delete(server);
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return retval == UA_STATUSCODE_GOOD ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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