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  *
   8  * PROGRAMMERS:     David Welch (welch@cwcom.net)
   9  */
  10
  11 /* INCLUDES *****************************************************************/
  12
  13 #include <ntoskrnl.h>
  14 #define NDEBUG
  15 #include <internal/debug.h>
  16
  17
  18 /* GLOBALS *******************************************************************/
  19
  20 POBJECT_TYPE    LpcPortObjectType = 0;
  21 ULONG           LpcpNextMessageId = 0; /* 0 is not a valid ID */
  22 FAST_MUTEX      LpcpLock; /* global internal sync in LPC facility */
  23
  24 static GENERIC_MAPPING ExpPortMapping = {
  25         STANDARD_RIGHTS_READ,
  26         STANDARD_RIGHTS_WRITE,
  27         0,
  28         PORT_ALL_ACCESS};
  29
  30 /* FUNCTIONS *****************************************************************/
  31
  32
  33 NTSTATUS INIT_FUNCTION
  34 LpcpInitSystem (VOID)
  35 {
  36    /* Allocate Memory for the LPC Object */
  37    LpcPortObjectType = ExAllocatePool(NonPagedPool, sizeof(OBJECT_TYPE));
  38    RtlZeroMemory (LpcPortObjectType, sizeof (OBJECT_TYPE));
  39
  40    RtlInitUnicodeString(&LpcPortObjectType->TypeName,L"Port");
  41
  42    LpcPortObjectType->Tag = TAG('L', 'P', 'R', 'T');
  43    LpcPortObjectType->PeakObjects = 0;
  44    LpcPortObjectType->PeakHandles = 0;
  45    LpcPortObjectType->TotalObjects = 0;
  46    LpcPortObjectType->TotalHandles = 0;
  47    LpcPortObjectType->PagedPoolCharge = 0;
  48    LpcPortObjectType->NonpagedPoolCharge = sizeof(EPORT);
  49    LpcPortObjectType->Mapping = &ExpPortMapping;
  50    LpcPortObjectType->Dump = NULL;
  51    LpcPortObjectType->Open = NULL;
  52    LpcPortObjectType->Close = NiClosePort;
  53    LpcPortObjectType->Delete = NiDeletePort;
  54    LpcPortObjectType->Parse = NULL;
  55    LpcPortObjectType->Security = NULL;
  56    LpcPortObjectType->QueryName = NULL;
  57    LpcPortObjectType->OkayToClose = NULL;
  58    LpcPortObjectType->Create = NiCreatePort;
  59    LpcPortObjectType->DuplicationNotify = NULL;
  60
  61    ObpCreateTypeObject(LpcPortObjectType);
  62
  63    LpcpNextMessageId = 0;
  64
  65    ExInitializeFastMutex (& LpcpLock);
  66
  67    return(STATUS_SUCCESS);
  68 }
  69
  70
  71 /**********************************************************************
  72  * NAME                                                 INTERNAL
  73  *      NiInitializePort/3
  74  *
  75  * DESCRIPTION
  76  *      Initialize the EPORT object attributes. The Port
  77  *      object enters the inactive state.
  78  *
  79  * ARGUMENTS
  80  *      Port    Pointer to an EPORT object to initialize.
  81  *      Type    connect (RQST), or communication port (COMM)
  82  *      Parent  OPTIONAL connect port a communication port
  83  *              is created from
  84  *
  85  * RETURN VALUE
  86  *      STATUS_SUCCESS if initialization succedeed. An error code
  87  *      otherwise.
  88  */
  89 NTSTATUS STDCALL
  90 LpcpInitializePort (IN OUT  PEPORT Port,
  91                   IN      USHORT Type,
  92                   IN      PEPORT Parent OPTIONAL)
  93 {
  94   if ((Type != EPORT_TYPE_SERVER_RQST_PORT) &&
  95       (Type != EPORT_TYPE_SERVER_COMM_PORT) &&
  96       (Type != EPORT_TYPE_CLIENT_COMM_PORT))
  97   {
  98           return STATUS_INVALID_PARAMETER_2;
  99   }
 100   memset (Port, 0, sizeof(EPORT));
 101   KeInitializeSpinLock (& Port->Lock);
 102   KeInitializeSemaphore( &Port->Semaphore, 0, LONG_MAX );
 103   Port->RequestPort = Parent;
 104   Port->OtherPort = NULL;
 105   Port->QueueLength = 0;
 106   Port->ConnectQueueLength = 0;
 107   Port->Type = Type;
 108   Port->State = EPORT_INACTIVE;
 109   InitializeListHead (& Port->QueueListHead);
 110   InitializeListHead (& Port->ConnectQueueListHead);
 111
 112   return (STATUS_SUCCESS);
 113 }
 114
 115
 116 /* MISCELLANEA SYSTEM SERVICES */
 117
 118
 119 /**********************************************************************
 120  * NAME                                                 SYSTEM
 121  *      NtImpersonateClientOfPort/2
 122  *
 123  * DESCRIPTION
 124  *
 125  * ARGUMENTS
 126  *      PortHandle,
 127  *      ClientMessage
 128  *
 129  * RETURN VALUE
 130  */
 131 NTSTATUS STDCALL
 132 NtImpersonateClientOfPort (HANDLE               PortHandle,
 133                            PLPC_MESSAGE ClientMessage)
 134 {
 135   UNIMPLEMENTED;
 136   return(STATUS_NOT_IMPLEMENTED);
 137 }
 138
 139 /* EOF */