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/**
* @file server_register.c
* @brief OPC UA Server that registers with a Local Discovery Server.
*
* This program runs an OPC UA server configured with security and periodically
* registers itself with a remote LDS using the RegisterServer2 service. It
* uses separate certificate pairs for the server and for the client connection
* to the LDS. On shutdown, it deregisters from the LDS.
*/
#include "common.h"
#include <open62541/client.h>
#include <open62541/client_config_default.h>
#include <open62541/plugin/log_stdout.h>
#include <open62541/server.h>
#include <open62541/server_config_default.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
UA_Boolean running = true;
static void
stopHandler (int sign)
{
UA_LOG_INFO (UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "received ctrl-c");
running = false;
}
/* ========================================================================
* Main
* ======================================================================== */
int
main (int argc, char **argv)
{
signal (SIGINT, stopHandler);
signal (SIGTERM, stopHandler);
if (argc < 11)
{
UA_LOG_FATAL (UA_Log_Stdout, UA_LOGCATEGORY_USERLAND,
"Usage: %s\n"
" <port> <applicationUri>\n"
" <server-certificate.der> <server-private-key.der>\n"
" <client-certificate.der> <client-private-key.der>\n"
" <discovery-server-endpoint>\n"
" <register-interval-seconds>\n"
" <security-mode> <security-policy>\n"
" [<trustlist1.der>, ...]\n"
"\n"
"Security modes : None, Sign, SignAndEncrypt\n"
"Security policies: None, Basic256Sha256, "
"Aes256_Sha256_RsaPss,\n"
" Aes128_Sha256_RsaOaep, ECC_nistP256",
argv[0]);
return EXIT_FAILURE;
}
UA_UInt16 port = (UA_UInt16)atoi (argv[1]);
const char *applicationUri = argv[2];
const char *clientCertPath = argv[5];
const char *clientKeyPath = argv[6];
const char *discoveryEndpoint = argv[7];
int registerInterval = atoi (argv[8]);
UA_MessageSecurityMode securityMode = parseSecurityMode (argv[9]);
if (securityMode == UA_MESSAGESECURITYMODE_INVALID)
{
UA_LOG_FATAL (UA_Log_Stdout, UA_LOGCATEGORY_USERLAND,
"Unknown security mode: %s", argv[9]);
return EXIT_FAILURE;
}
const char *securityPolicyUri = resolveSecurityPolicyUri (argv[10]);
if (!securityPolicyUri)
{
UA_LOG_FATAL (UA_Log_Stdout, UA_LOGCATEGORY_USERLAND,
"Unknown security policy: %s", argv[10]);
return EXIT_FAILURE;
}
size_t trustSize = (argc > 11) ? (size_t)argc - 11 : 0;
UA_StatusCode retval;
UA_Server *server = createSecureServer (
port, applicationUri, argv[3], argv[4], argv + 11, trustSize, &retval);
if (!server)
return EXIT_FAILURE;
UA_ServerConfig *serverConfig = UA_Server_getConfig (server);
serverConfig->applicationDescription.applicationType
= UA_APPLICATIONTYPE_SERVER;
UA_Server_run_startup (server);
/* UA_Server_registerDiscovery consumes (clears) the client config,
so a fresh zero-initialized config is needed for every call. */
UA_ClientConfig clientConfig;
memset (&clientConfig, 0, sizeof (UA_ClientConfig));
retval = createSecureClientConfig (
&clientConfig, applicationUri, clientCertPath, clientKeyPath, argv + 11,
trustSize, securityMode, securityPolicyUri);
if (retval != UA_STATUSCODE_GOOD)
{
UA_Server_run_shutdown (server);
UA_Server_delete (server);
return EXIT_FAILURE;
}
UA_String discoveryUrl = UA_STRING_ALLOC (discoveryEndpoint);
retval = UA_Server_registerDiscovery (server, &clientConfig, discoveryUrl,
UA_STRING_NULL);
UA_String_clear (&discoveryUrl);
if (retval != UA_STATUSCODE_GOOD)
UA_LOG_WARNING (UA_Log_Stdout, UA_LOGCATEGORY_SERVER,
"Initial register failed: %s",
UA_StatusCode_name (retval));
time_t lastRegister = time (NULL);
while (running)
{
UA_Server_run_iterate (server, true);
time_t now = time (NULL);
if (now - lastRegister >= registerInterval)
{
memset (&clientConfig, 0, sizeof (UA_ClientConfig));
retval = createSecureClientConfig (
&clientConfig, applicationUri, clientCertPath, clientKeyPath,
argv + 11, trustSize, securityMode, securityPolicyUri);
if (retval == UA_STATUSCODE_GOOD)
{
UA_String reregUrl = UA_STRING_ALLOC (discoveryEndpoint);
retval = UA_Server_registerDiscovery (server, &clientConfig,
reregUrl, UA_STRING_NULL);
UA_String_clear (&reregUrl);
if (retval != UA_STATUSCODE_GOOD)
UA_LOG_WARNING (UA_Log_Stdout, UA_LOGCATEGORY_SERVER,
"Re-register failed: %s",
UA_StatusCode_name (retval));
}
lastRegister = now;
}
}
memset (&clientConfig, 0, sizeof (UA_ClientConfig));
retval = createSecureClientConfig (
&clientConfig, applicationUri, clientCertPath, clientKeyPath, argv + 11,
trustSize, securityMode, securityPolicyUri);
if (retval == UA_STATUSCODE_GOOD)
{
UA_String deregUrl = UA_STRING_ALLOC (discoveryEndpoint);
retval = UA_Server_deregisterDiscovery (server, &clientConfig, deregUrl);
UA_String_clear (&deregUrl);
if (retval != UA_STATUSCODE_GOOD)
UA_LOG_ERROR (UA_Log_Stdout, UA_LOGCATEGORY_SERVER,
"Could not unregister from discovery server: %s",
UA_StatusCode_name (retval));
}
UA_Server_run_shutdown (server);
UA_Server_delete (server);
return EXIT_SUCCESS;
}
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