IOCTL_FARC_GET_NEXTNODEID

Purpose: query the Next-Node-ID

Parameter:
IN:   -
OUT:  UCHAR (size of output buffer > = 1 byte)

Comment:
This function returns the node-id of the logical neighbor in the network. Our own node hands over the token to this node.

Possible errors (see also Error codes):
E_FARC_INVALID_HANDLE
E_FARC_BUFFER_TOO_SMALL

Example:
Note, that the following example is only a fragment. It is recommended, that the driver is opened in asynchronous mode and a handle to the driver is available.

OVERLAPPED overlapped;
 DWORD read, err;
 BOOL ret;
UCHAR nextNodeID;

 overlapped.Offset = 0;
 overlapped.OffsetHigh = 0;
 overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 
...
 ret = DeviceIoControl(drvhandle,
     IOCTL_FARC_GET_NEXTNODEID,
     NULL, 0,
     &nextNodeID, sizeof(nextNodeID),
     &read, &overlapped);
if (!ret)
{
   err = GetLastError();
   if (err == E_FARC_PENDING)
   {
      ret = GetOverlappedResult(drvhandle, &overlapped, &read, TRUE);
      if (!ret)
      {
         err = GetLastError();
         // do errorhandling here
      }
   }
   else
   {
      // other error occured, perhaps wrong handle
   }
}
printf("neighbour node = %u",nextNodeID)
...

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