server_variable.c 2.5 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,
  21. const UA_NumericRange *range) {
  22. UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND,
  23. "onRead; handle is: %i", (uintptr_t)handle);
  24. }
  25. static void onWrite(void *h, const UA_NodeId nodeid, const UA_Variant *data,
  26. const UA_NumericRange *range) {
  27. UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "onWrite; handle: %i", (uintptr_t)h);
  28. }
  29. int main(int argc, char** argv) {
  30. signal(SIGINT, stopHandler); /* catches ctrl-c */
  31. UA_Server *server = UA_Server_new(UA_ServerConfig_standard);
  32. logger = Logger_Stdout_new();
  33. UA_Server_setLogger(server, logger);
  34. UA_ServerNetworkLayer *nl;
  35. nl = ServerNetworkLayerTCP_new(UA_ConnectionConfig_standard, 16664);
  36. UA_Server_addNetworkLayer(server, nl);
  37. /* add a variable node to the address space */
  38. UA_VariableAttributes attr;
  39. UA_VariableAttributes_init(&attr);
  40. UA_Int32 myInteger = 42;
  41. UA_Variant_setScalar(&attr.value, &myInteger, &UA_TYPES[UA_TYPES_INT32]);
  42. attr.description = UA_LOCALIZEDTEXT("en_US","the answer");
  43. attr.displayName = UA_LOCALIZEDTEXT("en_US","the answer");
  44. UA_NodeId myIntegerNodeId = UA_NODEID_STRING(1, "the.answer");
  45. UA_QualifiedName myIntegerName = UA_QUALIFIEDNAME(1, "the answer");
  46. UA_NodeId parentNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER);
  47. UA_NodeId parentReferenceNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES);
  48. UA_AddNodesResult res = UA_Server_addVariableNode(server, myIntegerNodeId, parentNodeId,
  49. parentReferenceNodeId, myIntegerName,
  50. UA_NODEID_NULL, attr);
  51. UA_AddNodesResult_deleteMembers(&res);
  52. UA_ValueCallback callback = {(void*)7, onRead, onWrite};
  53. UA_Server_setAttribute_value_callback(server, myIntegerNodeId, callback);
  54. UA_StatusCode retval = UA_Server_run(server, 1, &running);
  55. UA_Server_delete(server);
  56. return retval;
  57. }