if (!LockHeld) KeReleaseGuardedMutex(&LpcpLock);
}
+PLPCP_MESSAGE
+NTAPI
+LpcpFindDataInfoMessage(
+ IN PLPCP_PORT_OBJECT Port,
+ IN ULONG MessageId,
+ IN LPC_CLIENT_ID ClientId)
+{
+ PLPCP_MESSAGE Message;
+ PLIST_ENTRY ListEntry;
+ PAGED_CODE();
+
+ /* Check if the port we want is the connection port */
+ if ((Port->Flags & LPCP_PORT_TYPE_MASK) > LPCP_UNCONNECTED_PORT)
+ {
+ /* Use it */
+ Port = Port->ConnectionPort;
+ if (!Port)
+ {
+ /* Return NULL */
+ return NULL;
+ }
+ }
+
+ /* Loop all entries in the list */
+ for (ListEntry = Port->LpcDataInfoChainHead.Flink;
+ ListEntry != &Port->LpcDataInfoChainHead;
+ ListEntry = ListEntry->Flink)
+ {
+ Message = CONTAINING_RECORD(ListEntry, LPCP_MESSAGE, Entry);
+
+ /* Check if this is the desired message */
+ if ((Message->Request.MessageId == MessageId) &&
+ (Message->Request.ClientId.UniqueProcess == ClientId.UniqueProcess) &&
+ (Message->Request.ClientId.UniqueThread == ClientId.UniqueThread))
+ {
+ /* It is, return it */
+ return Message;
+ }
+ }
+
+ return NULL;
+}
+
VOID
NTAPI
LpcpMoveMessage(IN PPORT_MESSAGE Destination,
/* Copy the Message Data */
RtlCopyMemory(Destination + 1,
Data,
- ((Destination->u1.Length & 0xFFFF) + 3) &~3);
+ ALIGN_UP_BY(Destination->u1.s1.DataLength, sizeof(ULONG)));
}
/* PUBLIC FUNCTIONS **********************************************************/
return STATUS_NOT_IMPLEMENTED;
}
+NTSTATUS
+NTAPI
+LpcpCopyRequestData(
+ IN BOOLEAN Write,
+ IN HANDLE PortHandle,
+ IN PPORT_MESSAGE Message,
+ IN ULONG Index,
+ IN PVOID Buffer,
+ IN ULONG BufferLength,
+ OUT PULONG Returnlength)
+{
+ KPROCESSOR_MODE PreviousMode;
+ PORT_MESSAGE CapturedMessage;
+ PLPCP_PORT_OBJECT Port = NULL;
+ PETHREAD ClientThread = NULL;
+ ULONG LocalReturnlength;
+ PLPCP_MESSAGE InfoMessage;
+ PLPCP_DATA_INFO DataInfo;
+ PVOID DataInfoBaseAddress;
+ NTSTATUS Status;
+ PAGED_CODE();
+
+ /* Check the previous mode */
+ PreviousMode = ExGetPreviousMode();
+ if (PreviousMode == KernelMode)
+ {
+ CapturedMessage = *Message;
+ }
+ else
+ {
+ _SEH2_TRY
+ {
+ ProbeForRead(Message, sizeof(*Message), sizeof(PVOID));
+ CapturedMessage = *Message;
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ DPRINT1("Got exception!\n");
+ return _SEH2_GetExceptionCode();
+ }
+ _SEH2_END;
+ }
+
+ /* Make sure there is any data to copy */
+ if (CapturedMessage.u2.s2.DataInfoOffset == 0)
+ {
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ /* Reference the port handle */
+ Status = ObReferenceObjectByHandle(PortHandle,
+ PORT_ALL_ACCESS,
+ LpcPortObjectType,
+ PreviousMode,
+ (PVOID*)&Port,
+ NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Failed to reference port handle: 0x%ls\n", Status);
+ return Status;
+ }
+
+ /* Look up the client thread */
+ Status = PsLookupProcessThreadByCid(&CapturedMessage.ClientId,
+ NULL,
+ &ClientThread);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Failed to lookup client thread for [0x%lx:0x%lx]: 0x%ls\n",
+ CapturedMessage.ClientId.UniqueProcess,
+ CapturedMessage.ClientId.UniqueThread, Status);
+ goto Cleanup;
+ }
+
+ /* Acquire the global LPC lock */
+ KeAcquireGuardedMutex(&LpcpLock);
+
+ /* Check for message id mismatch */
+ if ((ClientThread->LpcReplyMessageId != CapturedMessage.MessageId) ||
+ (CapturedMessage.MessageId == 0))
+ {
+ DPRINT1("LpcReplyMessageId mismatch: 0x%lx/0x%lx.\n",
+ ClientThread->LpcReplyMessageId, CapturedMessage.MessageId);
+ Status = STATUS_REPLY_MESSAGE_MISMATCH;
+ goto CleanupWithLock;
+ }
+
+ /* Validate the port */
+ if (!LpcpValidateClientPort(ClientThread, Port))
+ {
+ DPRINT1("LpcpValidateClientPort failed\n");
+ Status = STATUS_REPLY_MESSAGE_MISMATCH;
+ goto CleanupWithLock;
+ }
+
+ /* Find the message with the data */
+ InfoMessage = LpcpFindDataInfoMessage(Port,
+ CapturedMessage.MessageId,
+ CapturedMessage.ClientId);
+ if (InfoMessage == NULL)
+ {
+ DPRINT1("LpcpFindDataInfoMessage failed\n");
+ Status = STATUS_INVALID_PARAMETER;
+ goto CleanupWithLock;
+ }
+
+ /* Get the data info */
+ DataInfo = LpcpGetDataInfoFromMessage(&InfoMessage->Request);
+
+ /* Check if the index is within bounds */
+ if (Index >= DataInfo->NumberOfEntries)
+ {
+ DPRINT1("Message data index %lu out of bounds (%lu in msg)\n",
+ Index, DataInfo->NumberOfEntries);
+ Status = STATUS_INVALID_PARAMETER;
+ goto CleanupWithLock;
+ }
+
+ /* Check if the caller wants to read/write more data than expected */
+ if (BufferLength > DataInfo->Entries[Index].DataLength)
+ {
+ DPRINT1("Trying to read more data (%lu) than available (%lu)\n",
+ BufferLength, DataInfo->Entries[Index].DataLength);
+ Status = STATUS_INVALID_PARAMETER;
+ goto CleanupWithLock;
+ }
+
+ /* Get the data pointer */
+ DataInfoBaseAddress = DataInfo->Entries[Index].BaseAddress;
+
+ /* Release the lock */
+ KeReleaseGuardedMutex(&LpcpLock);
+
+ if (Write)
+ {
+ /* Copy data from the caller to the message sender */
+ Status = MmCopyVirtualMemory(PsGetCurrentProcess(),
+ Buffer,
+ ClientThread->ThreadsProcess,
+ DataInfoBaseAddress,
+ BufferLength,
+ PreviousMode,
+ &LocalReturnlength);
+ }
+ else
+ {
+ /* Copy data from the message sender to the caller */
+ Status = MmCopyVirtualMemory(ClientThread->ThreadsProcess,
+ DataInfoBaseAddress,
+ PsGetCurrentProcess(),
+ Buffer,
+ BufferLength,
+ PreviousMode,
+ &LocalReturnlength);
+ }
+
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("MmCopyVirtualMemory failed: 0x%ls\n", Status);
+ goto Cleanup;
+ }
+
+ /* Check if the caller asked to return the copied length */
+ if (Returnlength != NULL)
+ {
+ _SEH2_TRY
+ {
+ *Returnlength = LocalReturnlength;
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ /* Ignore */
+ DPRINT1("Exception writing Returnlength, ignoring\n");
+ }
+ _SEH2_END;
+ }
+
+Cleanup:
+
+ if (ClientThread != NULL)
+ ObDereferenceObject(ClientThread);
+
+ ObDereferenceObject(Port);
+
+ return Status;
+
+CleanupWithLock:
+
+ /* Release the lock */
+ KeReleaseGuardedMutex(&LpcpLock);
+ goto Cleanup;
+}
+
/*
* @unimplemented
*/
IN ULONG Index,
IN PVOID Buffer,
IN ULONG BufferLength,
- OUT PULONG Returnlength)
+ OUT PULONG ReturnLength)
{
- UNIMPLEMENTED;
- return STATUS_NOT_IMPLEMENTED;
+ /* Call the internal function */
+ return LpcpCopyRequestData(FALSE,
+ PortHandle,
+ Message,
+ Index,
+ Buffer,
+ BufferLength,
+ ReturnLength);
}
/*
IN ULONG BufferLength,
OUT PULONG ReturnLength)
{
- UNIMPLEMENTED;
- return STATUS_NOT_IMPLEMENTED;
+ /* Call the internal function */
+ return LpcpCopyRequestData(TRUE,
+ PortHandle,
+ Message,
+ Index,
+ Buffer,
+ BufferLength,
+ ReturnLength);
}
/* EOF */
{
/* No type */
case 0:
-
+
/* Assume LPC request */
MessageType = LPC_REQUEST;
break;
-
+
/* LPC request callback */
case LPC_REQUEST:
-
+
/* This is a callback */
Callback = TRUE;
break;
-
+
/* Anything else */
case LPC_CLIENT_DIED:
case LPC_PORT_CLOSED:
case LPC_EXCEPTION:
case LPC_DEBUG_EVENT:
case LPC_ERROR_EVENT:
-
+
/* Nothing to do */
break;
-
+
default:
-
+
/* Invalid message type */
return STATUS_INVALID_PARAMETER;
}
-
+
/* Set the request type */
LpcRequest->u2.s2.Type = MessageType;
(&Message->Request) + 1,
0,
NULL);
-
+
/* Acquire the lock */
KeAcquireGuardedMutex(&LpcpLock);
-
+
/* Check if we replied to a thread */
if (Message->RepliedToThread)
{
return Status;
}
+NTSTATUS
+NTAPI
+LpcpVerifyMessageDataInfo(
+ _In_ PPORT_MESSAGE Message,
+ _Out_ PULONG NumberOfDataEntries)
+{
+ PLPCP_DATA_INFO DataInfo;
+ PUCHAR EndOfEntries;
+
+ /* Check if we have no data info at all */
+ if (Message->u2.s2.DataInfoOffset == 0)
+ {
+ *NumberOfDataEntries = 0;
+ return STATUS_SUCCESS;
+ }
+
+ /* Make sure the data info structure is within the message */
+ if (((ULONG)Message->u1.s1.TotalLength <
+ sizeof(PORT_MESSAGE) + sizeof(LPCP_DATA_INFO)) ||
+ ((ULONG)Message->u2.s2.DataInfoOffset < sizeof(PORT_MESSAGE)) ||
+ ((ULONG)Message->u2.s2.DataInfoOffset >
+ ((ULONG)Message->u1.s1.TotalLength - sizeof(LPCP_DATA_INFO))))
+ {
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ /* Get a pointer to the data info */
+ DataInfo = LpcpGetDataInfoFromMessage(Message);
+
+ /* Make sure the full data info with all entries is within the message */
+ EndOfEntries = (PUCHAR)&DataInfo->Entries[DataInfo->NumberOfEntries];
+ if ((EndOfEntries > ((PUCHAR)Message + (ULONG)Message->u1.s1.TotalLength)) ||
+ (EndOfEntries < (PUCHAR)Message))
+ {
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ *NumberOfDataEntries = DataInfo->NumberOfEntries;
+ return STATUS_SUCCESS;
+}
+
/*
* @implemented
*/
IN PPORT_MESSAGE LpcRequest,
IN OUT PPORT_MESSAGE LpcReply)
{
+ PORT_MESSAGE LocalLpcRequest;
+ ULONG NumberOfDataEntries;
PLPCP_PORT_OBJECT Port, QueuePort, ReplyPort, ConnectionPort = NULL;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
NTSTATUS Status;
BOOLEAN Callback;
PKSEMAPHORE Semaphore;
ULONG MessageType;
+ PLPCP_DATA_INFO DataInfo;
PAGED_CODE();
LPCTRACE(LPC_SEND_DEBUG,
"Handle: %p. Messages: %p/%p. Type: %lx\n",
/* Check if the thread is dying */
if (Thread->LpcExitThreadCalled) return STATUS_THREAD_IS_TERMINATING;
+ /* Check for user mode access */
+ if (PreviousMode != KernelMode)
+ {
+ _SEH2_TRY
+ {
+ /* Probe the full request message and copy the base structure */
+ ProbeForRead(LpcRequest, sizeof(*LpcRequest), sizeof(ULONG));
+ ProbeForRead(LpcRequest, LpcRequest->u1.s1.TotalLength, sizeof(ULONG));
+ LocalLpcRequest = *LpcRequest;
+
+ /* Probe the reply message for write */
+ ProbeForWrite(LpcReply, sizeof(*LpcReply), sizeof(ULONG));
+
+ /* Make sure the data entries in the request message are valid */
+ Status = LpcpVerifyMessageDataInfo(LpcRequest, &NumberOfDataEntries);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("LpcpVerifyMessageDataInfo failed\n");
+ return Status;
+ }
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ DPRINT1("Got exception\n");
+ return _SEH2_GetExceptionCode();
+ }
+ _SEH2_END;
+ }
+ else
+ {
+ LocalLpcRequest = *LpcRequest;
+ Status = LpcpVerifyMessageDataInfo(LpcRequest, &NumberOfDataEntries);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("LpcpVerifyMessageDataInfo failed\n");
+ return Status;
+ }
+ }
+
/* Check if this is an LPC Request */
- if (LpcpGetMessageType(LpcRequest) == LPC_REQUEST)
+ if (LpcpGetMessageType(&LocalLpcRequest) == LPC_REQUEST)
{
/* Then it's a callback */
Callback = TRUE;
}
- else if (LpcpGetMessageType(LpcRequest))
+ else if (LpcpGetMessageType(&LocalLpcRequest))
{
/* This is a not kernel-mode message */
+ DPRINT1("Not a kernel-mode message!\n");
return STATUS_INVALID_PARAMETER;
}
else
{
/* This is a kernel-mode message without a callback */
- LpcRequest->u2.s2.Type |= LPC_REQUEST;
+ LocalLpcRequest.u2.s2.Type |= LPC_REQUEST;
Callback = FALSE;
}
/* Get the message type */
- MessageType = LpcRequest->u2.s2.Type;
+ MessageType = LocalLpcRequest.u2.s2.Type;
+
+ /* Due to the above probe, we know that TotalLength is positive */
+ NT_ASSERT(LocalLpcRequest.u1.s1.TotalLength >= 0);
/* Validate the length */
- if (((ULONG)LpcRequest->u1.s1.DataLength + sizeof(PORT_MESSAGE)) >
- (ULONG)LpcRequest->u1.s1.TotalLength)
+ if ((((ULONG)(USHORT)LocalLpcRequest.u1.s1.DataLength + sizeof(PORT_MESSAGE)) >
+ (ULONG)LocalLpcRequest.u1.s1.TotalLength))
{
/* Fail */
+ DPRINT1("Invalid message length: %u, %u\n",
+ LocalLpcRequest.u1.s1.DataLength,
+ LocalLpcRequest.u1.s1.TotalLength);
return STATUS_INVALID_PARAMETER;
}
if (!NT_SUCCESS(Status)) return Status;
/* Validate the message length */
- if (((ULONG)LpcRequest->u1.s1.TotalLength > Port->MaxMessageLength) ||
- ((ULONG)LpcRequest->u1.s1.TotalLength <= (ULONG)LpcRequest->u1.s1.DataLength))
+ if (((ULONG)LocalLpcRequest.u1.s1.TotalLength > Port->MaxMessageLength) ||
+ ((ULONG)LocalLpcRequest.u1.s1.TotalLength <= (ULONG)LocalLpcRequest.u1.s1.DataLength))
{
/* Fail */
+ DPRINT1("Invalid message length: %u, %u\n",
+ LocalLpcRequest.u1.s1.DataLength,
+ LocalLpcRequest.u1.s1.TotalLength);
ObDereferenceObject(Port);
return STATUS_PORT_MESSAGE_TOO_LONG;
}
if (!Message)
{
/* Fail if we couldn't allocate a message */
+ DPRINT1("Failed to allocate a message!\n");
ObDereferenceObject(Port);
return STATUS_NO_MEMORY;
}
/* No callback, just copy the message */
_SEH2_TRY
{
+ /* Check if we have data info entries */
+ if (LpcRequest->u2.s2.DataInfoOffset != 0)
+ {
+ /* Get the data info and check if the number of entries matches
+ what we expect */
+ DataInfo = LpcpGetDataInfoFromMessage(LpcRequest);
+ if (DataInfo->NumberOfEntries != NumberOfDataEntries)
+ {
+ LpcpFreeToPortZone(Message, 0);
+ ObDereferenceObject(Port);
+ DPRINT1("NumberOfEntries has changed: %u, %u\n",
+ DataInfo->NumberOfEntries, NumberOfDataEntries);
+ return STATUS_INVALID_PARAMETER;
+ }
+ }
+
/* Copy it */
LpcpMoveMessage(&Message->Request,
LpcRequest,
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Fail */
+ DPRINT1("Got exception!\n");
LpcpFreeToPortZone(Message, 0);
ObDereferenceObject(Port);
_SEH2_YIELD(return _SEH2_GetExceptionCode());
if (!QueuePort)
{
/* We have no connected port, fail */
+ DPRINT1("No connected port\n");
LpcpFreeToPortZone(Message, LPCP_LOCK_HELD | LPCP_LOCK_RELEASE);
ObDereferenceObject(Port);
return STATUS_PORT_DISCONNECTED;
/* This will be the rundown port */
ReplyPort = QueuePort;
- /* Check if this is a communication port */
+ /* Check if this is a client port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) == LPCP_CLIENT_PORT)
{
- /* Copy the port context and use the connection port */
+ /* Copy the port context */
Message->PortContext = QueuePort->PortContext;
- ConnectionPort = QueuePort = Port->ConnectionPort;
- if (!ConnectionPort)
- {
- /* Fail */
- LpcpFreeToPortZone(Message, LPCP_LOCK_HELD | LPCP_LOCK_RELEASE);
- ObDereferenceObject(Port);
- return STATUS_PORT_DISCONNECTED;
- }
}
- else if ((Port->Flags & LPCP_PORT_TYPE_MASK) !=
- LPCP_COMMUNICATION_PORT)
+
+ if ((Port->Flags & LPCP_PORT_TYPE_MASK) != LPCP_COMMUNICATION_PORT)
{
/* Use the connection port for anything but communication ports */
ConnectionPort = QueuePort = Port->ConnectionPort;
if (!ConnectionPort)
{
/* Fail */
+ DPRINT1("No connection port\n");
LpcpFreeToPortZone(Message, LPCP_LOCK_HELD | LPCP_LOCK_RELEASE);
ObDereferenceObject(Port);
return STATUS_PORT_DISCONNECTED;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
+ DPRINT1("Got exception!\n");
Status = _SEH2_GetExceptionCode();
}
_SEH2_END;
projects / reactos.git / commitdiff