reactos/ntoskrnl/lpc/port.c

   1 /* $Id: port.c,v 1.20 2004/10/31 20:27:08 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 <ntoskrnl.h>
  18 #define NDEBUG
  19 #include <internal/debug.h>
  20
  21
  22 /* GLOBALS *******************************************************************/
  23
  24 POBJECT_TYPE    ExPortType = NULL;
  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 NiInitPort (VOID)
  39 {
  40    ExPortType = ExAllocatePoolWithTag(NonPagedPool,sizeof(OBJECT_TYPE),TAG_OBJECT_TYPE);
  41
  42    RtlRosInitUnicodeStringFromLiteral(&ExPortType->TypeName,L"Port");
  43
  44    ExPortType->Tag = TAG('L', 'P', 'R', 'T');
  45    ExPortType->MaxObjects = ULONG_MAX;
  46    ExPortType->MaxHandles = ULONG_MAX;
  47    ExPortType->TotalObjects = 0;
  48    ExPortType->TotalHandles = 0;
  49    ExPortType->PagedPoolCharge = 0;
  50    ExPortType->NonpagedPoolCharge = sizeof(EPORT);
  51    ExPortType->Mapping = &ExpPortMapping;
  52    ExPortType->Dump = NULL;
  53    ExPortType->Open = NULL;
  54    ExPortType->Close = NiClosePort;
  55    ExPortType->Delete = NiDeletePort;
  56    ExPortType->Parse = NULL;
  57    ExPortType->Security = NULL;
  58    ExPortType->QueryName = NULL;
  59    ExPortType->OkayToClose = NULL;
  60    ExPortType->Create = NiCreatePort;
  61    ExPortType->DuplicationNotify = NULL;
  62
  63    ObpCreateTypeObject(ExPortType);
  64
  65    LpcpNextMessageId = 0;
  66
  67    ExInitializeFastMutex (& LpcpLock);
  68
  69    return(STATUS_SUCCESS);
  70 }
  71
  72
  73 /**********************************************************************
  74  * NAME                                                 INTERNAL
  75  *      NiInitializePort/3
  76  *
  77  * DESCRIPTION
  78  *      Initialize the EPORT object attributes. The Port
  79  *      object enters the inactive state.
  80  *
  81  * ARGUMENTS
  82  *      Port    Pointer to an EPORT object to initialize.
  83  *      Type    connect (RQST), or communication port (COMM)
  84  *      Parent  OPTIONAL connect port a communication port
  85  *              is created from
  86  *
  87  * RETURN VALUE
  88  *      STATUS_SUCCESS if initialization succedeed. An error code
  89  *      otherwise.
  90  */
  91 NTSTATUS STDCALL
  92 NiInitializePort (IN OUT  PEPORT Port,
  93                   IN      USHORT Type,
  94                   IN      PEPORT Parent OPTIONAL)
  95 {
  96   if ((Type != EPORT_TYPE_SERVER_RQST_PORT) &&
  97       (Type != EPORT_TYPE_SERVER_COMM_PORT) &&
  98       (Type != EPORT_TYPE_CLIENT_COMM_PORT))
  99   {
 100           return STATUS_INVALID_PARAMETER_2;
 101   }
 102   memset (Port, 0, sizeof(EPORT));
 103   KeInitializeSpinLock (& Port->Lock);
 104   KeInitializeSemaphore( &Port->Semaphore, 0, LONG_MAX );
 105   Port->RequestPort = Parent;
 106   Port->OtherPort = NULL;
 107   Port->QueueLength = 0;
 108   Port->ConnectQueueLength = 0;
 109   Port->Type = Type;
 110   Port->State = EPORT_INACTIVE;
 111   InitializeListHead (& Port->QueueListHead);
 112   InitializeListHead (& Port->ConnectQueueListHead);
 113
 114   return (STATUS_SUCCESS);
 115 }
 116
 117
 118 /* MISCELLANEA SYSTEM SERVICES */
 119
 120
 121 /**********************************************************************
 122  * NAME                                                 SYSTEM
 123  *      NtImpersonateClientOfPort/2
 124  *
 125  * DESCRIPTION
 126  *
 127  * ARGUMENTS
 128  *      PortHandle,
 129  *      ClientMessage
 130  *
 131  * RETURN VALUE
 132  */
 133 NTSTATUS STDCALL
 134 NtImpersonateClientOfPort (HANDLE               PortHandle,
 135                            PLPC_MESSAGE ClientMessage)
 136 {
 137   UNIMPLEMENTED;
 138   return(STATUS_NOT_IMPLEMENTED);
 139 }
 140
 141 /* EOF */