reactos/ntoskrnl/lpc/port.c

   1 /* $Id: port.c,v 1.18 2004/08/04 12:50:42 ea Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/lpc/port.c
   6  * PURPOSE:         Communication mechanism
   7  * PROGRAMMER:      David Welch (welch@cwcom.net)
   8  * UPDATE HISTORY:
   9  *                  Created 22/05/98
  10  *
  11  *      2000-06-04 (ea)
  12  *              ntoskrnl/nt/port.c moved in ntoskrnl/lpc/port.c
  13  */
  14
  15 /* INCLUDES *****************************************************************/
  16
  17 #include <limits.h>
  18
  19 #include <ddk/ntddk.h>
  20 #include <internal/ob.h>
  21 #include <internal/port.h>
  22 #include <internal/dbg.h>
  23 #include <internal/pool.h>
  24 #include <rosrtl/string.h>
  25
  26 #define NDEBUG
  27 #include <internal/debug.h>
  28
  29
  30 /* GLOBALS *******************************************************************/
  31
  32 POBJECT_TYPE    ExPortType = NULL;
  33 ULONG           EiNextLpcMessageId = 0;
  34
  35 static GENERIC_MAPPING ExpPortMapping = {
  36         STANDARD_RIGHTS_READ,
  37         STANDARD_RIGHTS_WRITE,
  38         0,
  39         PORT_ALL_ACCESS};
  40
  41 /* FUNCTIONS *****************************************************************/
  42
  43
  44 NTSTATUS INIT_FUNCTION
  45 NiInitPort (VOID)
  46 {
  47    ExPortType = ExAllocatePool(NonPagedPool,sizeof(OBJECT_TYPE));
  48
  49    RtlRosInitUnicodeStringFromLiteral(&ExPortType->TypeName,L"Port");
  50
  51    ExPortType->Tag = TAG('L', 'P', 'R', 'T');
  52    ExPortType->MaxObjects = ULONG_MAX;
  53    ExPortType->MaxHandles = ULONG_MAX;
  54    ExPortType->TotalObjects = 0;
  55    ExPortType->TotalHandles = 0;
  56    ExPortType->PagedPoolCharge = 0;
  57    ExPortType->NonpagedPoolCharge = sizeof(EPORT);
  58    ExPortType->Mapping = &ExpPortMapping;
  59    ExPortType->Dump = NULL;
  60    ExPortType->Open = NULL;
  61    ExPortType->Close = NiClosePort;
  62    ExPortType->Delete = NiDeletePort;
  63    ExPortType->Parse = NULL;
  64    ExPortType->Security = NULL;
  65    ExPortType->QueryName = NULL;
  66    ExPortType->OkayToClose = NULL;
  67    ExPortType->Create = NiCreatePort;
  68    ExPortType->DuplicationNotify = NULL;
  69
  70    ObpCreateTypeObject(ExPortType);
  71
  72    EiNextLpcMessageId = 0;
  73
  74    return(STATUS_SUCCESS);
  75 }
  76
  77
  78 /**********************************************************************
  79  * NAME                                                 INTERNAL
  80  *      NiInitializePort/3
  81  *
  82  * DESCRIPTION
  83  *      Initialize the EPORT object attributes. The Port
  84  *      object enters the inactive state.
  85  *
  86  * ARGUMENTS
  87  *      Port    Pointer to an EPORT object to initialize.
  88  *
  89  * RETURN VALUE
  90  *      STATUS_SUCCESS if initialization succedeed. An error code
  91  *      otherwise.
  92  */
  93 NTSTATUS STDCALL
  94 NiInitializePort (IN OUT  PEPORT Port,
  95                   IN      USHORT Type,
  96                   IN      PEPORT Parent OPTIONAL)
  97 {
  98   if ((Type != EPORT_TYPE_SERVER_RQST_PORT) &&
  99       (Type != EPORT_TYPE_SERVER_COMM_PORT) &&
 100       (Type != EPORT_TYPE_CLIENT_COMM_PORT))
 101   {
 102           return STATUS_INVALID_PARAMETER_2;
 103   }
 104   memset (Port, 0, sizeof(EPORT));
 105   KeInitializeSpinLock (& Port->Lock);
 106   KeInitializeSemaphore( &Port->Semaphore, 0, LONG_MAX );
 107   Port->RequestPort = Parent;
 108   Port->OtherPort = NULL;
 109   Port->QueueLength = 0;
 110   Port->ConnectQueueLength = 0;
 111   Port->Type = Type;
 112   Port->State = EPORT_INACTIVE;
 113   InitializeListHead (& Port->QueueListHead);
 114   InitializeListHead (& Port->ConnectQueueListHead);
 115
 116   return (STATUS_SUCCESS);
 117 }
 118
 119
 120 /* MISCELLANEA SYSTEM SERVICES */
 121
 122
 123 /**********************************************************************
 124  * NAME                                                 SYSTEM
 125  *      NtImpersonateClientOfPort/2
 126  *
 127  * DESCRIPTION
 128  *
 129  * ARGUMENTS
 130  *      PortHandle,
 131  *      ClientMessage
 132  *
 133  * RETURN VALUE
 134  */
 135 NTSTATUS STDCALL
 136 NtImpersonateClientOfPort (HANDLE               PortHandle,
 137                            PLPC_MESSAGE ClientMessage)
 138 {
 139   UNIMPLEMENTED;
 140   return(STATUS_NOT_IMPLEMENTED);
 141 }
 142
 143 /* EOF */