ntoskrnl/lpc/listen.c

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            ntoskrnl/lpc/listen.c
   5  * PURPOSE:         Local Procedure Call: Listening
   6  * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
   7  */
   8
   9 /* INCLUDES ******************************************************************/
  10
  11 #include <ntoskrnl.h>
  12 #define NDEBUG
  13 #include <debug.h>
  14
  15 /* PUBLIC FUNCTIONS **********************************************************/
  16
  17 /*
  18  * @implemented
  19  */
  20 NTSTATUS
  21 NTAPI
  22 NtListenPort(IN HANDLE PortHandle,
  23              OUT PPORT_MESSAGE ConnectMessage)
  24 {
  25     NTSTATUS Status;
  26
  27     PAGED_CODE();
  28     LPCTRACE(LPC_LISTEN_DEBUG, "Handle: %p\n", PortHandle);
  29
  30     /* Wait forever for a connection request */
  31     for (;;)
  32     {
  33         /* Do the wait */
  34         Status = NtReplyWaitReceivePort(PortHandle,
  35                                         NULL,
  36                                         NULL,
  37                                         ConnectMessage);
  38
  39         _SEH2_TRY
  40         {
  41             /* Accept only LPC_CONNECTION_REQUEST requests */
  42             if ((Status != STATUS_SUCCESS) ||
  43                 (LpcpGetMessageType(ConnectMessage) == LPC_CONNECTION_REQUEST))
  44             {
  45                 /* Break out */
  46                 _SEH2_YIELD(break);
  47             }
  48         }
  49         _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
  50         {
  51             Status = _SEH2_GetExceptionCode();
  52             _SEH2_YIELD(break);
  53         }
  54         _SEH2_END;
  55     }
  56
  57     /* Return status */
  58     return Status;
  59 }
  60
  61 /* EOF */