reactos/lib/ntdll/csr/lpc.c

   1 /* $Id: lpc.c,v 1.3 2001/11/25 15:21:09 dwelch Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            lib/ntdll/csr/lpc.c
   6  * PURPOSE:         CSRSS Client/Server LPC API
   7  *
   8  * REVISIONS:
   9  *      2001-06-16 (ea)
  10  *              File api.c renamed lpc.c. Process/thread code moved
  11  *              in thread.c. Check added on the LPC port.
  12  */
  13
  14 /* INCLUDES *****************************************************************/
  15
  16 #include <ddk/ntddk.h>
  17 #include <ntdll/csr.h>
  18 #include <string.h>
  19
  20 #include <csrss/csrss.h>
  21
  22 #define NDEBUG
  23 #include <ntdll/ntdll.h>
  24
  25 /* GLOBALS *******************************************************************/
  26
  27 HANDLE WindowsApiPort = INVALID_HANDLE_VALUE;
  28
  29 /* FUNCTIONS *****************************************************************/
  30
  31 /* Possible CsrClientCallServer (the NT one):
  32
  33 #define CSR_CCS_NATIVE  0x0000
  34 #define CSR_CCS_CSR     0x0001
  35 #define CSR_CCS_GUI     0x0002
  36
  37 typedef union _CSR_CCS_API
  38 {
  39         WORD    Index;          // CSRSS API number
  40         WORD    Subsystem;      // 0=NTDLL;1=KERNEL32;2=KERNEL32
  41
  42 } CSR_CCS_API, * PCSR_CCS_API;
  43
  44 NTSTATUS STDCALL
  45 CsrClientCallServer(PVOID Request,
  46                     PVOID Unknown OPTIONAL,
  47                     CSR_CCS_API CsrApi,
  48                     ULONG SizeOfData);
  49
  50 Request is the family of PCSRSS_XXX_REQUEST objects.
  51 XXX_REQUEST depend on the CsrApiNumber.Index.
  52
  53 */
  54 NTSTATUS STDCALL
  55 CsrClientCallServer(PCSRSS_API_REQUEST Request,
  56                     PCSRSS_API_REPLY Reply OPTIONAL,
  57                     ULONG Length,
  58                     ULONG ReplyLength)
  59 {
  60   NTSTATUS Status;
  61
  62   if (INVALID_HANDLE_VALUE == WindowsApiPort)
  63     {
  64       DbgPrint ("NTDLL.%s: client not connected to CSRSS!\n", __FUNCTION__);
  65       return (STATUS_UNSUCCESSFUL);
  66     }
  67
  68    Request->Header.DataSize = Length - sizeof(LPC_MESSAGE_HEADER);
  69    Request->Header.MessageSize = Length;
  70
  71    Status = NtRequestWaitReplyPort(WindowsApiPort,
  72                                    &Request->Header,
  73                                    (Reply?&Reply->Header:&Request->Header));
  74
  75    return(Status);
  76 }
  77
  78 NTSTATUS STDCALL
  79 CsrClientConnectToServer(VOID)
  80 {
  81    NTSTATUS Status;
  82    UNICODE_STRING PortName;
  83    ULONG ConnectInfoLength;
  84    CSRSS_API_REQUEST Request;
  85    CSRSS_API_REPLY Reply;
  86
  87    RtlInitUnicodeString(&PortName, L"\\Windows\\ApiPort");
  88    ConnectInfoLength = 0;
  89    Status = NtConnectPort(&WindowsApiPort,
  90                           &PortName,
  91                           NULL,
  92                           NULL,
  93                           NULL,
  94                           NULL,
  95                           NULL,
  96                           &ConnectInfoLength);
  97    if (!NT_SUCCESS(Status))
  98      {
  99         return(Status);
 100      }
 101
 102    Request.Type = CSRSS_CONNECT_PROCESS;
 103    Status = CsrClientCallServer(&Request,
 104                                 &Reply,
 105                                 sizeof(CSRSS_API_REQUEST),
 106                                 sizeof(CSRSS_API_REPLY));
 107    if (!NT_SUCCESS(Status))
 108      {
 109         return(Status);
 110      }
 111    if (!NT_SUCCESS(Reply.Status))
 112      {
 113         return(Reply.Status);
 114      }
 115    return(STATUS_SUCCESS);
 116 }
 117
 118 /* EOF */