listen.c

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/*
 * PROJECT:         ReactOS Kernel
 * LICENSE:         GPL - See COPYING in the top level directory
 * FILE:            ntoskrnl/lpc/listen.c
 * PURPOSE:         Local Procedure Call: Listening
 * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
 */
 
/* INCLUDES ******************************************************************/
 
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
 
/* PUBLIC FUNCTIONS **********************************************************/
 
/*
 * @implemented
 */
NTSTATUS
NTAPI
NtListenPort(IN HANDLE PortHandle,
             OUT PPORT_MESSAGE ConnectMessage)
{
    NTSTATUS Status;
 
    PAGED_CODE();
    LPCTRACE(LPC_LISTEN_DEBUG, "Handle: %p\n", PortHandle);
 
    /* Wait forever for a connection request */
    for (;;)
    {
        /* Do the wait */
        Status = NtReplyWaitReceivePort(PortHandle,
                                        NULL,
                                        NULL,
                                        ConnectMessage);
 
        _SEH2_TRY
        {
            /* Accept only LPC_CONNECTION_REQUEST requests */
            if ((Status != STATUS_SUCCESS) ||
                (LpcpGetMessageType(ConnectMessage) == LPC_CONNECTION_REQUEST))
            {
                /* Break out */
                _SEH2_YIELD(break);
            }
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            Status = _SEH2_GetExceptionCode();
            _SEH2_YIELD(break);
        }
        _SEH2_END;
    }
 
    /* Return status */
    return Status;
}
 
/* EOF */