TAPCOM_OpenChannel.c

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#include                <stdlib.h>
#include                "FBLib_tapcom.h"
 
TAPCOM_Channel TAPCOM_OpenChannel(dword TargetID, dword ServiceID, dword ParamBlockVersion, void *ParamBlock)
{
  TRACEENTER();
 
  TAPCOM_InternalMesBuf *mesBuf = NULL;
 
  if(!LibInitialized && !InitTAPex())
  {
    TRACEEXIT();
    return NULL;
  }
 
  mesBuf = (TAPCOM_InternalMesBuf *) TAP_MemAlloc(sizeof(TAPCOM_InternalMesBuf));
 
  if(mesBuf)
  {
    // Speicherbereich für Nachrichtenaustausch anlegen
    mesBuf->tapcomSignature     = TAPCOM_SIGNATURE;
    mesBuf->tapcomVersion       = TAPCOM_VERSION;
    mesBuf->ServerAlive         = 0;
    mesBuf->FromID              = __tap_ud__;
    mesBuf->ToID                = TargetID;
    mesBuf->ServiceID           = ServiceID;
    mesBuf->ParamBlockVersion   = ParamBlockVersion;
    mesBuf->ParamBlock          = ParamBlock;
    mesBuf->Status              = TAPCOM_Status_OPEN;
    mesBuf->ReturnVal           = 0;
    mesBuf->Reserved            = 0;
 
    //Existiert der Ziel-Server überhaupt?
    if((TargetID != TAPCOM_App_BROADCAST) && !HDD_TAP_isRunning(TargetID))
    {
      mesBuf->Status = TAPCOM_Status_SERVER_NOT_AVAILABLE;
    }
    else
    {
      // TAPCOM Event mit der Adresse des Message-Buffers versenden.
      HDD_TAP_SendEvent(TargetID, FALSE, EVT_TAPCOM, (dword) mesBuf, 0);
    }
  }
 
  TRACEEXIT();
  return (TAPCOM_Channel) mesBuf;
}