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https://github.com/open62541/open62541.git
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74 lines
2.3 KiB
C
74 lines
2.3 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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/* Enable POSIX features */
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#if !defined(_XOPEN_SOURCE) && !defined(_WRS_KERNEL)
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# define _XOPEN_SOURCE 600
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#endif
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#ifndef _DEFAULT_SOURCE
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# define _DEFAULT_SOURCE
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#endif
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/* On older systems we need to define _BSD_SOURCE.
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* _DEFAULT_SOURCE is an alias for that. */
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#ifndef _BSD_SOURCE
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# define _BSD_SOURCE
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#endif
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#include "open62541.h"
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#include <signal.h>
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#ifdef _WIN32
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# include <windows.h>
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# define UA_sleep_ms(X) Sleep(X)
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#else
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# include <unistd.h>
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# define UA_sleep_ms(X) usleep(X * 1000)
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#endif
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UA_Boolean running = true;
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UA_Logger logger = UA_Log_Stdout;
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static void stopHandler(int sign) {
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UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "Received Ctrl-C");
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running = 0;
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}
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static void
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inactivityCallback (UA_Client *client) {
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UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "Server Inactivity");
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}
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int main(void) {
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signal(SIGINT, stopHandler); /* catches ctrl-c */
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UA_ClientConfig config = UA_ClientConfig_default;
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/* Set stateCallback */
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config.inactivityCallback = inactivityCallback;
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/* Perform a connectivity check every 2 seconds */
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config.connectivityCheckInterval = 2000;
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UA_Client *client = UA_Client_new(config);
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/* Endless loop runAsync */
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while (running) {
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/* If already connected, this will return GOOD and do nothing */
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/* If the connection is closed/errored, the connection will be reset and then reconnected */
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/* Alternatively you can also use UA_Client_getState to get the current state */
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UA_StatusCode retval = UA_Client_connect(client, "opc.tcp://localhost:4840");
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if(retval != UA_STATUSCODE_GOOD) {
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UA_LOG_ERROR(logger, UA_LOGCATEGORY_USERLAND, "Not connected. Retrying to connect in 1 second");
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/* The connect may timeout after 5 seconds (default timeout) or it may fail immediately on network errors */
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/* E.g. name resolution errors or unreachable network. Thus there should be a small sleep here */
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UA_sleep_ms(1000);
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continue;
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}
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UA_Client_runAsync(client, 1000);
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};
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/* Clean up */
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UA_Client_delete(client); /* Disconnects the client internally */
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return UA_STATUSCODE_GOOD;
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}
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