| /* 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 <open62541/server.h> |
| #include <open62541/server_config_default.h> |
| |
| #include <signal.h> |
| #include <stdlib.h> |
| |
| UA_Boolean running = true; |
| static void stopHandler(int sig) { |
| running = false; |
| } |
| |
| int main(void) { |
| signal(SIGINT, stopHandler); |
| signal(SIGTERM, stopHandler); |
| |
| UA_Server *server = UA_Server_new(); |
| UA_ServerConfig *config = UA_Server_getConfig(server); |
| UA_ServerConfig_setDefault(config); |
| |
| // This is an LDS server only. Set the application type to DISCOVERYSERVER. |
| // NOTE: This will cause UaExpert to not show this instance in the server list. |
| // See also: https://forum.unified-automation.com/topic1987.html |
| config->applicationDescription.applicationType = UA_APPLICATIONTYPE_DISCOVERYSERVER; |
| UA_String_clear(&config->applicationDescription.applicationUri); |
| config->applicationDescription.applicationUri = |
| UA_String_fromChars("urn:open62541.example.local_discovery_server"); |
| |
| // Enable the mDNS announce and response functionality |
| config->discovery.mdnsEnable = true; |
| |
| config->discovery.mdns.mdnsServerName = UA_String_fromChars("LDS"); |
| |
| // See http://www.opcfoundation.org/UA/schemas/1.03/ServerCapabilities.csv |
| // For a LDS server, you should only indicate the LDS capability. |
| // If this instance is an LDS and at the same time a normal OPC UA server, you also have to indicate |
| // the additional capabilities. |
| // NOTE: UaExpert does not show LDS-only servers in the list. |
| // See also: https://forum.unified-automation.com/topic1987.html |
| |
| // E.g. here we only set LDS, and you will not see it in UaExpert |
| config->discovery.mdns.serverCapabilitiesSize = 1; |
| UA_String *caps = (UA_String *) UA_Array_new(1, &UA_TYPES[UA_TYPES_STRING]); |
| caps[0] = UA_String_fromChars("LDS"); |
| config->discovery.mdns.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 |
| * every 10 seconds. The server will still be removed depending on the |
| * state of the semaphore file. */ |
| // config->discoveryCleanupTimeout = 60*60; |
| |
| UA_StatusCode retval = UA_Server_run(server, &running); |
| |
| UA_Server_delete(server); |
| return retval == UA_STATUSCODE_GOOD ? EXIT_SUCCESS : EXIT_FAILURE; |
| } |