reactos/ntoskrnl/lpc/port.c

   1 /* $Id$
   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 <ntoskrnl.h>
  18 #define NDEBUG
  19 #include <internal/debug.h>
  20
  21
  22 /* GLOBALS *******************************************************************/
  23
  24 POBJECT_TYPE    LpcPortObjectType = 0;
  25 ULONG           LpcpNextMessageId = 0; /* 0 is not a valid ID */
  26 FAST_MUTEX      LpcpLock; /* global internal sync in LPC facility */
  27
  28 static GENERIC_MAPPING ExpPortMapping = {
  29         STANDARD_RIGHTS_READ,
  30         STANDARD_RIGHTS_WRITE,
  31         0,
  32         PORT_ALL_ACCESS};
  33
  34 /* FUNCTIONS *****************************************************************/
  35
  36
  37 NTSTATUS INIT_FUNCTION
  38 LpcpInitSystem (VOID)
  39 {
  40     /* Allocate Memory for the LPC Object */
  41     LpcPortObjectType = ExAllocatePool(NonPagedPool, sizeof(OBJECT_TYPE));
  42     RtlZeroMemory (LpcPortObjectType, sizeof (OBJECT_TYPE));
  43
  44     RtlRosInitUnicodeStringFromLiteral(&LpcPortObjectType->TypeName,L"Port");
  45
  46    LpcPortObjectType->Tag = TAG('L', 'P', 'R', 'T');
  47    LpcPortObjectType->PeakObjects = 0;
  48    LpcPortObjectType->PeakHandles = 0;
  49    LpcPortObjectType->TotalObjects = 0;
  50    LpcPortObjectType->TotalHandles = 0;
  51    LpcPortObjectType->PagedPoolCharge = 0;
  52    LpcPortObjectType->NonpagedPoolCharge = sizeof(EPORT);
  53    LpcPortObjectType->Mapping = &ExpPortMapping;
  54    LpcPortObjectType->Dump = NULL;
  55    LpcPortObjectType->Open = NULL;
  56    LpcPortObjectType->Close = NiClosePort;
  57    LpcPortObjectType->Delete = NiDeletePort;
  58    LpcPortObjectType->Parse = NULL;
  59    LpcPortObjectType->Security = NULL;
  60    LpcPortObjectType->QueryName = NULL;
  61    LpcPortObjectType->OkayToClose = NULL;
  62    LpcPortObjectType->Create = NiCreatePort;
  63    LpcPortObjectType->DuplicationNotify = NULL;
  64
  65    ObpCreateTypeObject(LpcPortObjectType);
  66
  67    LpcpNextMessageId = 0;
  68
  69    ExInitializeFastMutex (& LpcpLock);
  70
  71    return(STATUS_SUCCESS);
  72 }
  73
  74
  75 /**********************************************************************
  76  * NAME                                                 INTERNAL
  77  *      NiInitializePort/3
  78  *
  79  * DESCRIPTION
  80  *      Initialize the EPORT object attributes. The Port
  81  *      object enters the inactive state.
  82  *
  83  * ARGUMENTS
  84  *      Port    Pointer to an EPORT object to initialize.
  85  *      Type    connect (RQST), or communication port (COMM)
  86  *      Parent  OPTIONAL connect port a communication port
  87  *              is created from
  88  *
  89  * RETURN VALUE
  90  *      STATUS_SUCCESS if initialization succedeed. An error code
  91  *      otherwise.
  92  */
  93 NTSTATUS STDCALL
  94 LpcpInitializePort (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 */