ntoskrnl/lpc/send.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/lpc/send.c
   6  * PURPOSE:         Communication mechanism
   7  * PROGRAMMER:      David Welch (welch@cwcom.net)
   8  * UPDATE HISTORY:
   9  *                  Created 22/05/98
  10  */
  11
  12 /* INCLUDES *****************************************************************/
  13
  14 #include <ddk/ntddk.h>
  15 #include <internal/ob.h>
  16 #include <internal/port.h>
  17 #include <internal/dbg.h>
  18 #include <internal/safe.h>
  19
  20 #define NDEBUG
  21 #include <internal/debug.h>
  22
  23
  24 /**********************************************************************
  25  * NAME
  26  *
  27  * DESCRIPTION
  28  *
  29  * ARGUMENTS
  30  *
  31  * RETURN VALUE
  32  *
  33  * REVISIONS
  34  */
  35 NTSTATUS STDCALL
  36 LpcSendTerminationPort (IN PEPORT Port,
  37                         IN TIME CreationTime)
  38 {
  39   NTSTATUS Status;
  40   LPC_TERMINATION_MESSAGE Msg;
  41
  42   Msg.CreationTime = CreationTime;
  43   Status = LpcRequestPort (Port, &Msg.Header);
  44   return(Status);
  45 }
  46
  47
  48 /**********************************************************************
  49  * NAME
  50  *
  51  * DESCRIPTION
  52  *
  53  * ARGUMENTS
  54  *
  55  * RETURN VALUE
  56  *
  57  * REVISIONS
  58  */
  59 NTSTATUS STDCALL
  60 LpcSendDebugMessagePort (IN PEPORT Port,
  61                          IN PLPC_DBG_MESSAGE Message,
  62                          OUT PLPC_DBG_MESSAGE Reply)
  63 {
  64    NTSTATUS Status;
  65    KIRQL oldIrql;
  66    PQUEUEDMESSAGE ReplyMessage;
  67
  68    Status = EiReplyOrRequestPort(Port,
  69                                  &Message->Header,
  70                                  LPC_REQUEST,
  71                                  Port);
  72    if (!NT_SUCCESS(Status))
  73      {
  74         ObDereferenceObject(Port);
  75         return(Status);
  76      }
  77    KeReleaseSemaphore(&Port->OtherPort->Semaphore, IO_NO_INCREMENT, 1, FALSE);
  78
  79    /*
  80     * Wait for a reply
  81     */
  82    KeWaitForSingleObject(&Port->Semaphore,
  83                          UserRequest,
  84                          UserMode,
  85                          FALSE,
  86                          NULL);
  87
  88    /*
  89     * Dequeue the reply
  90     */
  91    KeAcquireSpinLock(&Port->Lock, &oldIrql);
  92    ReplyMessage = EiDequeueMessagePort(Port);
  93    KeReleaseSpinLock(&Port->Lock, oldIrql);
  94    memcpy(Reply, &ReplyMessage->Message, ReplyMessage->Message.MessageSize);
  95    ExFreePool(ReplyMessage);
  96
  97    return(STATUS_SUCCESS);
  98 }
  99
 100
 101 /**********************************************************************
 102  * NAME
 103  *
 104  * DESCRIPTION
 105  *
 106  * ARGUMENTS
 107  *
 108  * RETURN VALUE
 109  *
 110  * REVISIONS
 111  *
 112  * @implemented
 113  */
 114 NTSTATUS STDCALL LpcRequestPort (IN     PEPORT          Port,
 115                                  IN     PLPC_MESSAGE    LpcMessage)
 116 {
 117    NTSTATUS Status;
 118
 119    DPRINT("LpcRequestPort(PortHandle %x LpcMessage %x)\n", Port, LpcMessage);
 120
 121    Status = EiReplyOrRequestPort(Port,
 122                                  LpcMessage,
 123                                  LPC_DATAGRAM,
 124                                  Port);
 125    KeReleaseSemaphore( &Port->Semaphore, IO_NO_INCREMENT, 1, FALSE );
 126
 127    return(Status);
 128 }
 129
 130
 131 /**********************************************************************
 132  * NAME
 133  *
 134  * DESCRIPTION
 135  *
 136  * ARGUMENTS
 137  *
 138  * RETURN VALUE
 139  *
 140  * REVISIONS
 141  *
 142  * @implemented
 143  */
 144 NTSTATUS STDCALL NtRequestPort (IN      HANDLE          PortHandle,
 145                                 IN      PLPC_MESSAGE    LpcMessage)
 146 {
 147    NTSTATUS Status;
 148    PEPORT Port;
 149
 150    DPRINT("NtRequestPort(PortHandle %x LpcMessage %x)\n", PortHandle,
 151           LpcMessage);
 152
 153    Status = ObReferenceObjectByHandle(PortHandle,
 154                                       PORT_ALL_ACCESS,
 155                                       ExPortType,
 156                                       UserMode,
 157                                       (PVOID*)&Port,
 158                                       NULL);
 159    if (!NT_SUCCESS(Status))
 160      {
 161         DPRINT("NtRequestPort() = %x\n", Status);
 162         return(Status);
 163      }
 164
 165    Status = LpcRequestPort(Port->OtherPort,
 166                            LpcMessage);
 167
 168    ObDereferenceObject(Port);
 169    return(Status);
 170 }
 171
 172
 173 /**********************************************************************
 174  * NAME
 175  *
 176  * DESCRIPTION
 177  *
 178  * ARGUMENTS
 179  *
 180  * RETURN VALUE
 181  *
 182  * REVISIONS
 183  *
 184  * @implemented
 185  */
 186 NTSTATUS STDCALL
 187 NtRequestWaitReplyPort (IN HANDLE PortHandle,
 188                         PLPC_MESSAGE UnsafeLpcRequest,
 189                         PLPC_MESSAGE UnsafeLpcReply)
 190 {
 191    NTSTATUS Status;
 192    PEPORT Port;
 193    PQUEUEDMESSAGE Message;
 194    KIRQL oldIrql;
 195    PLPC_MESSAGE LpcRequest;
 196    USHORT LpcRequestMessageSize;
 197
 198    DPRINT("NtRequestWaitReplyPort(PortHandle %x, LpcRequest %x, "
 199           "LpcReply %x)\n", PortHandle, UnsafeLpcRequest, UnsafeLpcReply);
 200
 201    Status = ObReferenceObjectByHandle(PortHandle,
 202                                       PORT_ALL_ACCESS,
 203                                       ExPortType,
 204                                       UserMode,
 205                                       (PVOID*)&Port,
 206                                       NULL);
 207    if (!NT_SUCCESS(Status))
 208      {
 209         return(Status);
 210      }
 211
 212    Status = MmCopyFromCaller(&LpcRequestMessageSize,
 213                              &UnsafeLpcRequest->MessageSize,
 214                              sizeof(USHORT));
 215    if (!NT_SUCCESS(Status))
 216      {
 217        ObDereferenceObject(Port);
 218        return(Status);
 219      }
 220    if (LpcRequestMessageSize > (sizeof(LPC_MESSAGE) + MAX_MESSAGE_DATA))
 221      {
 222        ObDereferenceObject(Port);
 223        return(STATUS_PORT_MESSAGE_TOO_LONG);
 224      }
 225    LpcRequest = ExAllocatePool(NonPagedPool, LpcRequestMessageSize);
 226    if (LpcRequest == NULL)
 227      {
 228        ObDereferenceObject(Port);
 229        return(STATUS_NO_MEMORY);
 230      }
 231    Status = MmCopyFromCaller(LpcRequest, UnsafeLpcRequest,
 232                              LpcRequestMessageSize);
 233    if (!NT_SUCCESS(Status))
 234      {
 235        ExFreePool(LpcRequest);
 236        ObDereferenceObject(Port);
 237        return(Status);
 238      }
 239    LpcRequestMessageSize = LpcRequest->MessageSize;
 240    if (LpcRequestMessageSize > (sizeof(LPC_MESSAGE) + MAX_MESSAGE_DATA))
 241      {
 242        ExFreePool(LpcRequest);
 243        ObDereferenceObject(Port);
 244        return(STATUS_PORT_MESSAGE_TOO_LONG);
 245      }
 246    if (LpcRequest->DataSize != (LpcRequest->MessageSize - sizeof(LPC_MESSAGE)))
 247      {
 248        ExFreePool(LpcRequest);
 249        ObDereferenceObject(Port);
 250        return(STATUS_PORT_MESSAGE_TOO_LONG);
 251      }
 252
 253    Status = EiReplyOrRequestPort(Port->OtherPort,
 254                                  LpcRequest,
 255                                  LPC_REQUEST,
 256                                  Port);
 257    if (!NT_SUCCESS(Status))
 258      {
 259         DbgPrint("Enqueue failed\n");
 260         ExFreePool(LpcRequest);
 261         ObDereferenceObject(Port);
 262         return(Status);
 263      }
 264    ExFreePool(LpcRequest);
 265    KeReleaseSemaphore (&Port->OtherPort->Semaphore, IO_NO_INCREMENT,
 266                        1, FALSE);
 267
 268    /*
 269     * Wait for a reply
 270     */
 271    Status = KeWaitForSingleObject(&Port->Semaphore,
 272                                   UserRequest,
 273                                   UserMode,
 274                                   FALSE,
 275                                   NULL);
 276    if (Status == STATUS_SUCCESS)
 277      {
 278
 279        /*
 280         * Dequeue the reply
 281         */
 282        KeAcquireSpinLock(&Port->Lock, &oldIrql);
 283        Message = EiDequeueMessagePort(Port);
 284        KeReleaseSpinLock(&Port->Lock, oldIrql);
 285        if (Message)
 286          {
 287            DPRINT("Message->Message.MessageSize %d\n",
 288                   Message->Message.MessageSize);
 289            Status = MmCopyToCaller(UnsafeLpcReply, &Message->Message,
 290                                    Message->Message.MessageSize);
 291            ExFreePool(Message);
 292          }
 293        else
 294          Status = STATUS_UNSUCCESSFUL;
 295      }
 296    else
 297      {
 298        if (NT_SUCCESS(Status))
 299          {
 300            Status = STATUS_UNSUCCESSFUL;
 301          }
 302      }
 303    ObDereferenceObject(Port);
 304
 305    return(Status);
 306 }
 307
 308
 309 /**********************************************************************
 310  * NAME
 311  *
 312  * DESCRIPTION
 313  *
 314  * ARGUMENTS
 315  *
 316  * RETURN VALUE
 317  *
 318  * REVISIONS
 319  */
 320 NTSTATUS STDCALL NtWriteRequestData (HANDLE             PortHandle,
 321                                      PLPC_MESSAGE       Message,
 322                                      ULONG              Index,
 323                                      PVOID              Buffer,
 324                                      ULONG              BufferLength,
 325                                      PULONG             ReturnLength)
 326 {
 327    UNIMPLEMENTED;
 328 }
 329
 330
 331 /* EOF */