server_variable.c 2.4 KB

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  1. /*
  2. * This work is licensed under a Creative Commons CCZero 1.0 Universal License.
  3. * See http://creativecommons.org/publicdomain/zero/1.0/ for more information.
  4. */
  5. #include <signal.h>
  6. #ifdef UA_NO_AMALGAMATION
  7. # include "ua_types.h"
  8. # include "ua_server.h"
  9. # include "logger_stdout.h"
  10. # include "networklayer_tcp.h"
  11. #else
  12. # include "open62541.h"
  13. #endif
  14. UA_Boolean running = 1;
  15. UA_Logger logger;
  16. static void stopHandler(int sign) {
  17. UA_LOG_INFO(logger, UA_LOGCATEGORY_SERVER, "received ctrl-c");
  18. running = 0;
  19. }
  20. static void onRead(void *handle, const UA_NodeId nodeid, const UA_Variant *data, const UA_NumericRange *range){
  21. UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "onRead; handle is: %i", (uintptr_t)handle);
  22. }
  23. static void onWrite(void *handle, const UA_NodeId nodeid, const UA_Variant *data, const UA_NumericRange *range){
  24. UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "onWrite; handle is: %i", (uintptr_t)handle);
  25. }
  26. int main(int argc, char** argv) {
  27. signal(SIGINT, stopHandler); /* catches ctrl-c */
  28. UA_Server *server = UA_Server_new(UA_ServerConfig_standard);
  29. logger = Logger_Stdout_new();
  30. UA_Server_setLogger(server, logger);
  31. UA_Server_addNetworkLayer(server, ServerNetworkLayerTCP_new(UA_ConnectionConfig_standard, 16664));
  32. /* add a variable node to the address space */
  33. UA_Variant *myIntegerVariant = UA_Variant_new();
  34. UA_Int32 myInteger = 42;
  35. UA_Variant_setScalarCopy(myIntegerVariant, &myInteger, &UA_TYPES[UA_TYPES_INT32]);
  36. //NOTE: the link between myInteger and the value of the node is lost here, you can safely reuse myInteger
  37. UA_QualifiedName myIntegerName = UA_QUALIFIEDNAME(1, "the answer");
  38. UA_NodeId myIntegerNodeId = UA_NODEID_STRING(1, "the.answer"); /* UA_NODEID_NULL would assign a random free nodeid */
  39. UA_LocalizedText myIntegerBrowseName = UA_LOCALIZEDTEXT("en_US","the answer");
  40. UA_NodeId parentNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER);
  41. UA_NodeId parentReferenceNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES);
  42. UA_Server_addVariableNode(server, myIntegerNodeId, myIntegerName, myIntegerBrowseName, myIntegerBrowseName, 0, 0,
  43. parentNodeId, parentReferenceNodeId, myIntegerVariant, NULL);
  44. UA_ValueCallback callback = {(void*)7, onRead, onWrite};
  45. UA_Server_setAttribute_valueCallback(server, myIntegerNodeId, callback);
  46. UA_StatusCode retval = UA_Server_run(server, 1, &running);
  47. UA_Server_delete(server);
  48. return retval;
  49. }