/*
* @implemented
*/
NTSTATUS
NTAPI
NtReplyPort(IN HANDLE PortHandle,
IN PPORT_MESSAGE ReplyMessage)
{
NTSTATUS Status;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
PORT_MESSAGE CapturedReplyMessage;
PLPCP_PORT_OBJECT Port;
PLPCP_MESSAGE Message;
PETHREAD Thread = PsGetCurrentThread(), WakeupThread;
PAGED_CODE();
LPCTRACE(LPC_REPLY_DEBUG,
"Handle: %p. Message: %p.\n",
PortHandle,
ReplyMessage);
/* Check if the call comes from user mode */
if (PreviousMode != KernelMode)
{
_SEH2_TRY
{
ProbeForRead(ReplyMessage, sizeof(*ReplyMessage), sizeof(ULONG));
CapturedReplyMessage = *(volatile PORT_MESSAGE*)ReplyMessage;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
_SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
}
/*
* @implemented
*/
NTSTATUS
NTAPI
NtReplyPort(IN HANDLE PortHandle,
IN PPORT_MESSAGE ReplyMessage)
{
PLPCP_PORT_OBJECT Port;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
NTSTATUS Status;
PLPCP_MESSAGE Message;
PETHREAD Thread = PsGetCurrentThread(), WakeupThread;
//PORT_MESSAGE CapturedReplyMessage;
PAGED_CODE();
LPCTRACE(LPC_REPLY_DEBUG,
"Handle: %p. Message: %p.\n",
PortHandle,
ReplyMessage);
if (KeGetPreviousMode() == UserMode)
{
_SEH2_TRY
{
ProbeForRead(ReplyMessage, sizeof(PORT_MESSAGE), sizeof(ULONG));
/*RtlCopyMemory(&CapturedReplyMessage, ReplyMessage, sizeof(PORT_MESSAGE));
ReplyMessage = &CapturedReplyMessage;*/
}
_SEH2_EXCEPT(ExSystemExceptionFilter())
{
DPRINT1("SEH crash [1]\n");
DbgBreakPoint();
_SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
}
/*
* @implemented
*/
NTSTATUS
NTAPI
NtListenPort(IN HANDLE PortHandle,
OUT PPORT_MESSAGE ConnectMessage)
{
NTSTATUS Status;
PAGED_CODE();
LPCTRACE(LPC_LISTEN_DEBUG, "Handle: %lx\n", PortHandle);
/* Wait forever for a connection request. */
for (;;)
{
/* Do the wait */
Status = NtReplyWaitReceivePort(PortHandle,
NULL,
NULL,
ConnectMessage);
/* Accept only LPC_CONNECTION_REQUEST requests. */
if ((Status != STATUS_SUCCESS) ||
(LpcpGetMessageType(ConnectMessage) == LPC_CONNECTION_REQUEST))
{
/* Break out */
break;
}
}
/* Return status */
return Status;
}
VOID
NTAPI
LpcpFreeToPortZone(IN PLPCP_MESSAGE Message,
IN ULONG LockFlags)
{
PLPCP_CONNECTION_MESSAGE ConnectMessage;
PLPCP_PORT_OBJECT ClientPort = NULL;
PETHREAD Thread = NULL;
BOOLEAN LockHeld = (LockFlags & LPCP_LOCK_HELD);
BOOLEAN ReleaseLock = (LockFlags & LPCP_LOCK_RELEASE);
PAGED_CODE();
LPCTRACE(LPC_CLOSE_DEBUG, "Message: %p. LockFlags: %lx\n", Message, LockFlags);
/* Acquire the lock if not already */
if (!LockHeld) KeAcquireGuardedMutex(&LpcpLock);
/* Check if the queue list is empty */
if (!IsListEmpty(&Message->Entry))
{
/* Remove and re-initialize */
RemoveEntryList(&Message->Entry);
InitializeListHead(&Message->Entry);
}
/* Check if we've already replied */
if (Message->RepliedToThread)
{
/* Set thread to dereference and clean up */
Thread = Message->RepliedToThread;
Message->RepliedToThread = NULL;
}
/* Check if this is a connection request */
if (Message->Request.u2.s2.Type == LPC_CONNECTION_REQUEST)
{
/* Get the connection message */
ConnectMessage = (PLPCP_CONNECTION_MESSAGE)(Message + 1);
/* Clear the client port */
ClientPort = ConnectMessage->ClientPort;
if (ClientPort) ConnectMessage->ClientPort = NULL;
}
/* Release the lock */
KeReleaseGuardedMutex(&LpcpLock);
/* Check if we had anything to dereference */
if (Thread) ObDereferenceObject(Thread);
if (ClientPort) ObDereferenceObject(ClientPort);
/* Free the entry */
ExFreeToPagedLookasideList(&LpcpMessagesLookaside, Message);
/* Reacquire the lock if needed */
if ((LockHeld) && !(ReleaseLock)) KeAcquireGuardedMutex(&LpcpLock);
}
/*
* @implemented
*/
NTSTATUS
NTAPI
NtRequestWaitReplyPort(IN HANDLE PortHandle,
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;
PLPCP_MESSAGE Message;
PETHREAD Thread = PsGetCurrentThread();
BOOLEAN Callback;
PKSEMAPHORE Semaphore;
ULONG MessageType;
PLPCP_DATA_INFO DataInfo;
PAGED_CODE();
LPCTRACE(LPC_SEND_DEBUG,
"Handle: %p. Messages: %p/%p. Type: %lx\n",
PortHandle,
LpcRequest,
LpcReply,
LpcpGetMessageType(LpcRequest));
/* 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;
}
VOID
NTAPI
LpcpMoveMessage(IN PPORT_MESSAGE Destination,
IN PPORT_MESSAGE Origin,
IN PVOID Data,
IN ULONG MessageType,
IN PCLIENT_ID ClientId)
{
LPCTRACE((LPC_REPLY_DEBUG | LPC_SEND_DEBUG),
"Destination/Origin: %p/%p. Data: %p. Length: %lx\n",
Destination,
Origin,
Data,
Origin->u1.Length);
/* Set the Message size */
Destination->u1.Length = Origin->u1.Length;
/* Set the Message Type */
Destination->u2.s2.Type = !MessageType ?
Origin->u2.s2.Type : MessageType & 0xFFFF;
/* Check if we have a Client ID */
if (ClientId)
{
/* Set the Client ID */
Destination->ClientId.UniqueProcess = ClientId->UniqueProcess;
Destination->ClientId.UniqueThread = ClientId->UniqueThread;
}
else
{
/* Otherwise, copy it */
Destination->ClientId.UniqueProcess = Origin->ClientId.UniqueProcess;
Destination->ClientId.UniqueThread = Origin->ClientId.UniqueThread;
}
/* Copy the MessageId and ClientViewSize */
Destination->MessageId = Origin->MessageId;
Destination->ClientViewSize = Origin->ClientViewSize;
/* Copy the Message Data */
RtlCopyMemory(Destination + 1,
Data,
ALIGN_UP_BY(Destination->u1.s1.DataLength, sizeof(ULONG)));
}
VOID
NTAPI
LpcpClosePort(IN PEPROCESS Process OPTIONAL,
IN PVOID Object,
IN ACCESS_MASK GrantedAccess,
IN ULONG ProcessHandleCount,
IN ULONG SystemHandleCount)
{
PLPCP_PORT_OBJECT Port = (PLPCP_PORT_OBJECT)Object;
LPCTRACE(LPC_CLOSE_DEBUG, "Port: %p. Flags: %lx\n", Port, Port->Flags);
/* Only Server-side Connection Ports need clean up*/
if ((Port->Flags & LPCP_PORT_TYPE_MASK) == LPCP_CONNECTION_PORT)
{
/* Check the handle count */
switch (SystemHandleCount)
{
/* No handles left */
case 0:
/* Destroy the port queue */
LpcpDestroyPortQueue(Port, TRUE);
break;
/* Last handle remaining */
case 1:
/* Reset the queue only */
LpcpDestroyPortQueue(Port, FALSE);
/* More handles remain, do nothing */
default:
break;
}
}
}
/*
* @implemented
*/
NTSTATUS
NTAPI
NtRequestWaitReplyPort(IN HANDLE PortHandle,
IN PPORT_MESSAGE LpcRequest,
IN OUT PPORT_MESSAGE LpcReply)
{
PLPCP_PORT_OBJECT Port, QueuePort, ReplyPort, ConnectionPort = NULL;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
NTSTATUS Status;
PLPCP_MESSAGE Message;
PETHREAD Thread = PsGetCurrentThread();
BOOLEAN Callback;
PKSEMAPHORE Semaphore;
ULONG MessageType;
PAGED_CODE();
LPCTRACE(LPC_SEND_DEBUG,
"Handle: %lx. Messages: %p/%p. Type: %lx\n",
PortHandle,
LpcRequest,
LpcReply,
LpcpGetMessageType(LpcRequest));
/* Check if the thread is dying */
if (Thread->LpcExitThreadCalled) return STATUS_THREAD_IS_TERMINATING;
/* Check if this is an LPC Request */
if (LpcpGetMessageType(LpcRequest) == LPC_REQUEST)
{
/* Then it's a callback */
Callback = TRUE;
}
else if (LpcpGetMessageType(LpcRequest))
{
/* This is a not kernel-mode message */
return STATUS_INVALID_PARAMETER;
}
else
{
/* This is a kernel-mode message without a callback */
LpcRequest->u2.s2.Type |= LPC_REQUEST;
Callback = FALSE;
}
/* Get the message type */
MessageType = LpcRequest->u2.s2.Type;
/* Validate the length */
if (((ULONG)LpcRequest->u1.s1.DataLength + sizeof(PORT_MESSAGE)) >
(ULONG)LpcRequest->u1.s1.TotalLength)
{
/* Fail */
return STATUS_INVALID_PARAMETER;
}
/* Reference the object */
Status = ObReferenceObjectByHandle(PortHandle,
0,
LpcPortObjectType,
PreviousMode,
(PVOID*)&Port,
NULL);
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))
{
/* Fail */
ObDereferenceObject(Port);
return STATUS_PORT_MESSAGE_TOO_LONG;
}
/* Allocate a message from the port zone */
Message = LpcpAllocateFromPortZone();
if (!Message)
{
/* Fail if we couldn't allocate a message */
ObDereferenceObject(Port);
return STATUS_NO_MEMORY;
}
/* Check if this is a callback */
if (Callback)
{
/* FIXME: TODO */
Semaphore = NULL; // we'd use the Thread Semaphore here
ASSERT(FALSE);
}
else
{
/* No callback, just copy the message */
_SEH2_TRY
{
/* Copy it */
LpcpMoveMessage(&Message->Request,
LpcRequest,
LpcRequest + 1,
MessageType,
&Thread->Cid);
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Fail */
LpcpFreeToPortZone(Message, 0);
ObDereferenceObject(Port);
_SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
/* Acquire the LPC lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Right now clear the port context */
Message->PortContext = NULL;
/* Check if this is a not connection port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) != LPCP_CONNECTION_PORT)
{
/* We want the connected port */
QueuePort = Port->ConnectedPort;
if (!QueuePort)
{
/* We have no connected port, fail */
LpcpFreeToPortZone(Message, 3);
ObDereferenceObject(Port);
return STATUS_PORT_DISCONNECTED;
}
/* This will be the rundown port */
ReplyPort = QueuePort;
/* Check if this is a communication port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) == LPCP_CLIENT_PORT)
{
/* Copy the port context and use the connection port */
Message->PortContext = QueuePort->PortContext;
ConnectionPort = QueuePort = Port->ConnectionPort;
if (!ConnectionPort)
{
/* Fail */
LpcpFreeToPortZone(Message, 3);
ObDereferenceObject(Port);
return STATUS_PORT_DISCONNECTED;
}
}
else 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 */
LpcpFreeToPortZone(Message, 3);
ObDereferenceObject(Port);
return STATUS_PORT_DISCONNECTED;
}
}
/* Reference the connection port if it exists */
if (ConnectionPort) ObReferenceObject(ConnectionPort);
}
else
{
/* Otherwise, for a connection port, use the same port object */
QueuePort = ReplyPort = Port;
}
/* No reply thread */
Message->RepliedToThread = NULL;
Message->SenderPort = Port;
/* Generate the Message ID and set it */
Message->Request.MessageId = LpcpNextMessageId++;
if (!LpcpNextMessageId) LpcpNextMessageId = 1;
Message->Request.CallbackId = 0;
/* Set the message ID for our thread now */
Thread->LpcReplyMessageId = Message->Request.MessageId;
Thread->LpcReplyMessage = NULL;
/* Insert the message in our chain */
InsertTailList(&QueuePort->MsgQueue.ReceiveHead, &Message->Entry);
InsertTailList(&ReplyPort->LpcReplyChainHead, &Thread->LpcReplyChain);
LpcpSetPortToThread(Thread, Port);
/* Release the lock and get the semaphore we'll use later */
KeEnterCriticalRegion();
KeReleaseGuardedMutex(&LpcpLock);
Semaphore = QueuePort->MsgQueue.Semaphore;
/* If this is a waitable port, wake it up */
if (QueuePort->Flags & LPCP_WAITABLE_PORT)
{
/* Wake it */
KeSetEvent(&QueuePort->WaitEvent, IO_NO_INCREMENT, FALSE);
}
}
/* Now release the semaphore */
LpcpCompleteWait(Semaphore);
KeLeaveCriticalRegion();
/* And let's wait for the reply */
LpcpReplyWait(&Thread->LpcReplySemaphore, PreviousMode);
/* Acquire the LPC lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Get the LPC Message and clear our thread's reply data */
Message = LpcpGetMessageFromThread(Thread);
Thread->LpcReplyMessage = NULL;
Thread->LpcReplyMessageId = 0;
/* Check if we have anything on the reply chain*/
if (!IsListEmpty(&Thread->LpcReplyChain))
{
/* Remove this thread and reinitialize the list */
RemoveEntryList(&Thread->LpcReplyChain);
InitializeListHead(&Thread->LpcReplyChain);
}
/* Release the lock */
KeReleaseGuardedMutex(&LpcpLock);
/* Check if we got a reply */
if (Status == STATUS_SUCCESS)
{
/* Check if we have a valid message */
if (Message)
{
LPCTRACE(LPC_SEND_DEBUG,
"Reply Messages: %p/%p\n",
&Message->Request,
(&Message->Request) + 1);
/* Move the message */
_SEH2_TRY
{
LpcpMoveMessage(LpcReply,
&Message->Request,
(&Message->Request) + 1,
0,
NULL);
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Status = _SEH2_GetExceptionCode();
}
_SEH2_END;
/* Check if this is an LPC request with data information */
if ((LpcpGetMessageType(&Message->Request) == LPC_REQUEST) &&
(Message->Request.u2.s2.DataInfoOffset))
{
/* Save the data information */
LpcpSaveDataInfoMessage(Port, Message, 0);
}
else
{
/* Otherwise, just free it */
LpcpFreeToPortZone(Message, 0);
}
}
else
{
/* We don't have a reply */
Status = STATUS_LPC_REPLY_LOST;
}
}
/*
* @implemented
*/
NTSTATUS
NTAPI
NtRequestPort(IN HANDLE PortHandle,
IN PPORT_MESSAGE LpcRequest)
{
PLPCP_PORT_OBJECT Port, QueuePort, ConnectionPort = NULL;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
NTSTATUS Status;
PLPCP_MESSAGE Message;
PETHREAD Thread = PsGetCurrentThread();
PKSEMAPHORE Semaphore;
ULONG MessageType;
PAGED_CODE();
LPCTRACE(LPC_SEND_DEBUG,
"Handle: %lx. Message: %p. Type: %lx\n",
PortHandle,
LpcRequest,
LpcpGetMessageType(LpcRequest));
/* Get the message type */
MessageType = LpcRequest->u2.s2.Type | LPC_DATAGRAM;
/* Can't have data information on this type of call */
if (LpcRequest->u2.s2.DataInfoOffset) return STATUS_INVALID_PARAMETER;
/* Validate the length */
if (((ULONG)LpcRequest->u1.s1.DataLength + sizeof(PORT_MESSAGE)) >
(ULONG)LpcRequest->u1.s1.TotalLength)
{
/* Fail */
return STATUS_INVALID_PARAMETER;
}
/* Reference the object */
Status = ObReferenceObjectByHandle(PortHandle,
0,
LpcPortObjectType,
PreviousMode,
(PVOID*)&Port,
NULL);
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))
{
/* Fail */
ObDereferenceObject(Port);
return STATUS_PORT_MESSAGE_TOO_LONG;
}
/* Allocate a message from the port zone */
Message = LpcpAllocateFromPortZone();
if (!Message)
{
/* Fail if we couldn't allocate a message */
ObDereferenceObject(Port);
return STATUS_NO_MEMORY;
}
/* No callback, just copy the message */
_SEH2_TRY
{
/* Copy it */
LpcpMoveMessage(&Message->Request,
LpcRequest,
LpcRequest + 1,
MessageType,
&Thread->Cid);
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Fail */
LpcpFreeToPortZone(Message, 0);
ObDereferenceObject(Port);
_SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
/* Acquire the LPC lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Right now clear the port context */
Message->PortContext = NULL;
/* Check if this is a not connection port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) != LPCP_CONNECTION_PORT)
{
/* We want the connected port */
QueuePort = Port->ConnectedPort;
if (!QueuePort)
{
/* We have no connected port, fail */
LpcpFreeToPortZone(Message, 3);
ObDereferenceObject(Port);
return STATUS_PORT_DISCONNECTED;
}
/* Check if this is a communication port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) == LPCP_CLIENT_PORT)
{
/* Copy the port context and use the connection port */
Message->PortContext = QueuePort->PortContext;
ConnectionPort = QueuePort = Port->ConnectionPort;
if (!ConnectionPort)
{
/* Fail */
LpcpFreeToPortZone(Message, 3);
ObDereferenceObject(Port);
return STATUS_PORT_DISCONNECTED;
}
}
else 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 */
LpcpFreeToPortZone(Message, 3);
ObDereferenceObject(Port);
return STATUS_PORT_DISCONNECTED;
}
}
/* Reference the connection port if it exists */
if (ConnectionPort) ObReferenceObject(ConnectionPort);
}
else
{
/* Otherwise, for a connection port, use the same port object */
QueuePort = Port;
}
/* Reference QueuePort if we have it */
if (QueuePort && ObReferenceObjectSafe(QueuePort))
{
/* Set sender's port */
Message->SenderPort = Port;
/* Generate the Message ID and set it */
Message->Request.MessageId = LpcpNextMessageId++;
if (!LpcpNextMessageId) LpcpNextMessageId = 1;
Message->Request.CallbackId = 0;
/* No Message ID for the thread */
PsGetCurrentThread()->LpcReplyMessageId = 0;
/* Insert the message in our chain */
InsertTailList(&QueuePort->MsgQueue.ReceiveHead, &Message->Entry);
/* Release the lock and get the semaphore we'll use later */
KeEnterCriticalRegion();
KeReleaseGuardedMutex(&LpcpLock);
/* Now release the semaphore */
Semaphore = QueuePort->MsgQueue.Semaphore;
LpcpCompleteWait(Semaphore);
/* If this is a waitable port, wake it up */
if (QueuePort->Flags & LPCP_WAITABLE_PORT)
{
/* Wake it */
KeSetEvent(&QueuePort->WaitEvent, IO_NO_INCREMENT, FALSE);
}
KeLeaveCriticalRegion();
/* Dereference objects */
if (ConnectionPort) ObDereferenceObject(ConnectionPort);
ObDereferenceObject(QueuePort);
ObDereferenceObject(Port);
LPCTRACE(LPC_SEND_DEBUG, "Port: %p. Message: %p\n", QueuePort, Message);
return STATUS_SUCCESS;
}
Status = STATUS_PORT_DISCONNECTED;
/* All done with a failure*/
LPCTRACE(LPC_SEND_DEBUG,
"Port: %p. Status: %p\n",
Port,
Status);
/* The wait failed, free the message */
if (Message) LpcpFreeToPortZone(Message, 3);
ObDereferenceObject(Port);
if (ConnectionPort) ObDereferenceObject(ConnectionPort);
return Status;
}
/*
* @implemented
*/
NTSTATUS
NTAPI
LpcRequestPort(IN PVOID PortObject,
IN PPORT_MESSAGE LpcMessage)
{
PLPCP_PORT_OBJECT Port = PortObject, QueuePort, ConnectionPort = NULL;
ULONG MessageType;
PLPCP_MESSAGE Message;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
PAGED_CODE();
LPCTRACE(LPC_SEND_DEBUG, "Port: %p. Message: %p\n", Port, LpcMessage);
/* Check if this is a non-datagram message */
if (LpcMessage->u2.s2.Type)
{
/* Get the message type */
MessageType = LpcpGetMessageType(LpcMessage);
/* Validate it */
if ((MessageType < LPC_DATAGRAM) || (MessageType > LPC_CLIENT_DIED))
{
/* Fail */
return STATUS_INVALID_PARAMETER;
}
/* Mark this as a kernel-mode message only if we really came from it */
if ((PreviousMode == KernelMode) &&
(LpcMessage->u2.s2.Type & LPC_KERNELMODE_MESSAGE))
{
/* We did, this is a kernel mode message */
MessageType |= LPC_KERNELMODE_MESSAGE;
}
}
else
{
/* This is a datagram */
MessageType = LPC_DATAGRAM;
}
/* Can't have data information on this type of call */
if (LpcMessage->u2.s2.DataInfoOffset) return STATUS_INVALID_PARAMETER;
/* Validate message sizes */
if (((ULONG)LpcMessage->u1.s1.TotalLength > Port->MaxMessageLength) ||
((ULONG)LpcMessage->u1.s1.TotalLength <= (ULONG)LpcMessage->u1.s1.DataLength))
{
/* Fail */
return STATUS_PORT_MESSAGE_TOO_LONG;
}
/* Allocate a new message */
Message = LpcpAllocateFromPortZone();
if (!Message) return STATUS_NO_MEMORY;
/* Clear the context */
Message->RepliedToThread = NULL;
Message->PortContext = NULL;
/* Copy the message */
LpcpMoveMessage(&Message->Request,
LpcMessage,
LpcMessage + 1,
MessageType,
&PsGetCurrentThread()->Cid);
/* Acquire the LPC lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Check if this is anything but a connection port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) != LPCP_CONNECTION_PORT)
{
/* The queue port is the connected port */
QueuePort = Port->ConnectedPort;
if (QueuePort)
{
/* Check if this is a client port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) == LPCP_CLIENT_PORT)
{
/* Then copy the context */
Message->PortContext = QueuePort->PortContext;
ConnectionPort = QueuePort = Port->ConnectionPort;
if (!ConnectionPort)
{
/* Fail */
LpcpFreeToPortZone(Message, 3);
return STATUS_PORT_DISCONNECTED;
}
}
else if ((Port->Flags & LPCP_PORT_TYPE_MASK) != LPCP_COMMUNICATION_PORT)
{
/* Any other kind of port, use the connection port */
ConnectionPort = QueuePort = Port->ConnectionPort;
if (!ConnectionPort)
{
/* Fail */
LpcpFreeToPortZone(Message, 3);
return STATUS_PORT_DISCONNECTED;
}
}
/* If we have a connection port, reference it */
if (ConnectionPort) ObReferenceObject(ConnectionPort);
}
}
else
{
/* For connection ports, use the port itself */
QueuePort = PortObject;
}
/* Make sure we have a port */
if (QueuePort)
{
/* Generate the Message ID and set it */
Message->Request.MessageId = LpcpNextMessageId++;
if (!LpcpNextMessageId) LpcpNextMessageId = 1;
Message->Request.CallbackId = 0;
/* No Message ID for the thread */
PsGetCurrentThread()->LpcReplyMessageId = 0;
/* Insert the message in our chain */
InsertTailList(&QueuePort->MsgQueue.ReceiveHead, &Message->Entry);
/* Release the lock and release the semaphore */
KeEnterCriticalRegion();
KeReleaseGuardedMutex(&LpcpLock);
LpcpCompleteWait(QueuePort->MsgQueue.Semaphore);
/* If this is a waitable port, wake it up */
if (QueuePort->Flags & LPCP_WAITABLE_PORT)
{
/* Wake it */
KeSetEvent(&QueuePort->WaitEvent, IO_NO_INCREMENT, FALSE);
}
/* We're done */
KeLeaveCriticalRegion();
if (ConnectionPort) ObDereferenceObject(ConnectionPort);
LPCTRACE(LPC_SEND_DEBUG, "Port: %p. Message: %p\n", QueuePort, Message);
return STATUS_SUCCESS;
}
/* If we got here, then free the message and fail */
LpcpFreeToPortZone(Message, 3);
if (ConnectionPort) ObDereferenceObject(ConnectionPort);
return STATUS_PORT_DISCONNECTED;
}
/*
* @implemented
*/
NTSTATUS
NTAPI
LpcRequestWaitReplyPort(IN PVOID PortObject,
IN PPORT_MESSAGE LpcRequest,
OUT PPORT_MESSAGE LpcReply)
{
PLPCP_PORT_OBJECT Port, QueuePort, ReplyPort, ConnectionPort = NULL;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
PLPCP_MESSAGE Message;
PETHREAD Thread = PsGetCurrentThread();
BOOLEAN Callback = FALSE;
PKSEMAPHORE Semaphore;
USHORT MessageType;
PAGED_CODE();
Port = (PLPCP_PORT_OBJECT)PortObject;
LPCTRACE(LPC_SEND_DEBUG,
"Port: %p. Messages: %p/%p. Type: %lx\n",
Port,
LpcRequest,
LpcReply,
LpcpGetMessageType(LpcRequest));
/* Check if the thread is dying */
if (Thread->LpcExitThreadCalled) return STATUS_THREAD_IS_TERMINATING;
/* Check if this is an LPC Request */
MessageType = LpcpGetMessageType(LpcRequest);
switch (MessageType)
{
/* 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;
/* Validate the message length */
if (((ULONG)LpcRequest->u1.s1.TotalLength > Port->MaxMessageLength) ||
((ULONG)LpcRequest->u1.s1.TotalLength <= (ULONG)LpcRequest->u1.s1.DataLength))
{
/* Fail */
return STATUS_PORT_MESSAGE_TOO_LONG;
}
/* Allocate a message from the port zone */
Message = LpcpAllocateFromPortZone();
if (!Message)
{
/* Fail if we couldn't allocate a message */
return STATUS_NO_MEMORY;
}
/* Check if this is a callback */
if (Callback)
{
/* FIXME: TODO */
Semaphore = NULL; // we'd use the Thread Semaphore here
ASSERT(FALSE);
return STATUS_NOT_IMPLEMENTED;
}
else
{
/* No callback, just copy the message */
LpcpMoveMessage(&Message->Request,
LpcRequest,
LpcRequest + 1,
0,
&Thread->Cid);
/* Acquire the LPC lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Right now clear the port context */
Message->PortContext = NULL;
/* Check if this is a not connection port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) != LPCP_CONNECTION_PORT)
{
/* We want the connected port */
QueuePort = Port->ConnectedPort;
if (!QueuePort)
{
/* We have no connected port, fail */
LpcpFreeToPortZone(Message, 3);
return STATUS_PORT_DISCONNECTED;
}
/* This will be the rundown port */
ReplyPort = QueuePort;
/* Check if this is a communication port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) == LPCP_CLIENT_PORT)
{
/* Copy the port context and use the connection port */
Message->PortContext = QueuePort->PortContext;
ConnectionPort = QueuePort = Port->ConnectionPort;
if (!ConnectionPort)
{
/* Fail */
LpcpFreeToPortZone(Message, 3);
return STATUS_PORT_DISCONNECTED;
}
}
else 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 */
LpcpFreeToPortZone(Message, 3);
return STATUS_PORT_DISCONNECTED;
}
}
/* Reference the connection port if it exists */
if (ConnectionPort) ObReferenceObject(ConnectionPort);
}
else
{
/* Otherwise, for a connection port, use the same port object */
QueuePort = ReplyPort = Port;
}
/* No reply thread */
Message->RepliedToThread = NULL;
Message->SenderPort = Port;
/* Generate the Message ID and set it */
Message->Request.MessageId = LpcpNextMessageId++;
if (!LpcpNextMessageId) LpcpNextMessageId = 1;
Message->Request.CallbackId = 0;
/* Set the message ID for our thread now */
Thread->LpcReplyMessageId = Message->Request.MessageId;
Thread->LpcReplyMessage = NULL;
/* Insert the message in our chain */
InsertTailList(&QueuePort->MsgQueue.ReceiveHead, &Message->Entry);
InsertTailList(&ReplyPort->LpcReplyChainHead, &Thread->LpcReplyChain);
LpcpSetPortToThread(Thread, Port);
/* Release the lock and get the semaphore we'll use later */
KeEnterCriticalRegion();
KeReleaseGuardedMutex(&LpcpLock);
Semaphore = QueuePort->MsgQueue.Semaphore;
/* If this is a waitable port, wake it up */
if (QueuePort->Flags & LPCP_WAITABLE_PORT)
{
/* Wake it */
KeSetEvent(&QueuePort->WaitEvent, IO_NO_INCREMENT, FALSE);
}
}
/* Now release the semaphore */
LpcpCompleteWait(Semaphore);
KeLeaveCriticalRegion();
/* And let's wait for the reply */
LpcpReplyWait(&Thread->LpcReplySemaphore, PreviousMode);
/* Acquire the LPC lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Get the LPC Message and clear our thread's reply data */
Message = LpcpGetMessageFromThread(Thread);
Thread->LpcReplyMessage = NULL;
Thread->LpcReplyMessageId = 0;
/* Check if we have anything on the reply chain*/
if (!IsListEmpty(&Thread->LpcReplyChain))
{
/* Remove this thread and reinitialize the list */
RemoveEntryList(&Thread->LpcReplyChain);
InitializeListHead(&Thread->LpcReplyChain);
}
/* Release the lock */
KeReleaseGuardedMutex(&LpcpLock);
/* Check if we got a reply */
if (Status == STATUS_SUCCESS)
{
/* Check if we have a valid message */
if (Message)
{
LPCTRACE(LPC_SEND_DEBUG,
"Reply Messages: %p/%p\n",
&Message->Request,
(&Message->Request) + 1);
/* Move the message */
LpcpMoveMessage(LpcReply,
&Message->Request,
(&Message->Request) + 1,
0,
NULL);
/* Acquire the lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Check if we replied to a thread */
if (Message->RepliedToThread)
{
/* Dereference */
ObDereferenceObject(Message->RepliedToThread);
Message->RepliedToThread = NULL;
}
/* Free the message */
LpcpFreeToPortZone(Message, 3);
}
else
{
/* We don't have a reply */
Status = STATUS_LPC_REPLY_LOST;
}
}
else
{
/* The wait failed, free the message */
if (Message) LpcpFreeToPortZone(Message, 0);
}
/* All done */
LPCTRACE(LPC_SEND_DEBUG,
"Port: %p. Status: %p\n",
Port,
Status);
/* Dereference the connection port */
if (ConnectionPort) ObDereferenceObject(ConnectionPort);
return Status;
}
/*
* @implemented
*/
NTSTATUS
NTAPI
NtAcceptConnectPort(OUT PHANDLE PortHandle,
IN PVOID PortContext OPTIONAL,
IN PPORT_MESSAGE ReplyMessage,
IN BOOLEAN AcceptConnection,
IN PPORT_VIEW ServerView,
IN PREMOTE_PORT_VIEW ClientView)
{
PLPCP_PORT_OBJECT ConnectionPort, ServerPort, ClientPort;
PVOID ClientSectionToMap = NULL;
HANDLE Handle;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
NTSTATUS Status;
ULONG ConnectionInfoLength;
PLPCP_MESSAGE Message;
PLPCP_CONNECTION_MESSAGE ConnectMessage;
PEPROCESS ClientProcess;
PETHREAD ClientThread;
LARGE_INTEGER SectionOffset;
CLIENT_ID ClientId;
ULONG MessageId;
PAGED_CODE();
LPCTRACE(LPC_COMPLETE_DEBUG,
"Context: %p. Message: %p. Accept: %lx. Views: %p/%p\n",
PortContext,
ReplyMessage,
AcceptConnection,
ClientView,
ServerView);
/* Check if the call comes from user mode */
if (PreviousMode != KernelMode)
{
/* Enter SEH for probing the parameters */
_SEH2_TRY
{
ProbeForWriteHandle(PortHandle);
/* Probe the basic ReplyMessage structure */
ProbeForRead(ReplyMessage, sizeof(PORT_MESSAGE), sizeof(ULONG));
/* Grab some values */
ClientId = ReplyMessage->ClientId;
MessageId = ReplyMessage->MessageId;
ConnectionInfoLength = ReplyMessage->u1.s1.DataLength;
/* Probe the connection info */
ProbeForRead(ReplyMessage + 1, ConnectionInfoLength, 1);
/* The following parameters are optional */
if (ServerView != NULL)
{
ProbeForWrite(ServerView, sizeof(PORT_VIEW), sizeof(ULONG));
/* Validate the size of the server view */
if (ServerView->Length != sizeof(PORT_VIEW))
{
/* Invalid size */
_SEH2_YIELD(return STATUS_INVALID_PARAMETER);
}
}
/*
* @implemented
*/
NTSTATUS
NTAPI
NtSecureConnectPort(OUT PHANDLE PortHandle,
IN PUNICODE_STRING PortName,
IN PSECURITY_QUALITY_OF_SERVICE Qos,
IN OUT PPORT_VIEW ClientView OPTIONAL,
IN PSID ServerSid OPTIONAL,
IN OUT PREMOTE_PORT_VIEW ServerView OPTIONAL,
OUT PULONG MaxMessageLength OPTIONAL,
IN OUT PVOID ConnectionInformation OPTIONAL,
IN OUT PULONG ConnectionInformationLength OPTIONAL)
{
ULONG ConnectionInfoLength = 0;
PLPCP_PORT_OBJECT Port, ClientPort;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
HANDLE Handle;
PVOID SectionToMap;
PLPCP_MESSAGE Message;
PLPCP_CONNECTION_MESSAGE ConnectMessage;
PETHREAD Thread = PsGetCurrentThread();
ULONG PortMessageLength;
LARGE_INTEGER SectionOffset;
PTOKEN Token;
PTOKEN_USER TokenUserInfo;
PAGED_CODE();
LPCTRACE(LPC_CONNECT_DEBUG,
"Name: %wZ. Qos: %p. Views: %p/%p. Sid: %p\n",
PortName,
Qos,
ClientView,
ServerView,
ServerSid);
/* Validate client view */
if ((ClientView) && (ClientView->Length != sizeof(PORT_VIEW)))
{
/* Fail */
return STATUS_INVALID_PARAMETER;
}
/* Validate server view */
if ((ServerView) && (ServerView->Length != sizeof(REMOTE_PORT_VIEW)))
{
/* Fail */
return STATUS_INVALID_PARAMETER;
}
/* Check if caller sent connection information length */
if (ConnectionInformationLength)
{
/* Retrieve the input length */
ConnectionInfoLength = *ConnectionInformationLength;
}
/* Get the port */
Status = ObReferenceObjectByName(PortName,
0,
NULL,
PORT_CONNECT,
LpcPortObjectType,
PreviousMode,
NULL,
(PVOID *)&Port);
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to reference port '%wZ': 0x%lx\n", PortName, Status);
return Status;
}
/* This has to be a connection port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) != LPCP_CONNECTION_PORT)
{
/* It isn't, so fail */
ObDereferenceObject(Port);
return STATUS_INVALID_PORT_HANDLE;
}
/* Check if we have a SID */
if (ServerSid)
{
/* Make sure that we have a server */
if (Port->ServerProcess)
{
/* Get its token and query user information */
Token = PsReferencePrimaryToken(Port->ServerProcess);
//Status = SeQueryInformationToken(Token, TokenUser, (PVOID*)&TokenUserInfo);
// FIXME: Need SeQueryInformationToken
Status = STATUS_SUCCESS;
TokenUserInfo = ExAllocatePoolWithTag(PagedPool, sizeof(TOKEN_USER), TAG_SE);
TokenUserInfo->User.Sid = ServerSid;
PsDereferencePrimaryToken(Token);
/* Check for success */
if (NT_SUCCESS(Status))
{
/* Compare the SIDs */
if (!RtlEqualSid(ServerSid, TokenUserInfo->User.Sid))
{
/* Fail */
Status = STATUS_SERVER_SID_MISMATCH;
}
/* Free token information */
ExFreePoolWithTag(TokenUserInfo, TAG_SE);
}
}
else
{
/* Invalid SID */
Status = STATUS_SERVER_SID_MISMATCH;
}
/* Check if SID failed */
if (!NT_SUCCESS(Status))
{
/* Quit */
ObDereferenceObject(Port);
return Status;
}
}
/* Create the client port */
Status = ObCreateObject(PreviousMode,
LpcPortObjectType,
NULL,
PreviousMode,
NULL,
sizeof(LPCP_PORT_OBJECT),
0,
0,
(PVOID *)&ClientPort);
if (!NT_SUCCESS(Status))
{
/* Failed, dereference the server port and return */
ObDereferenceObject(Port);
return Status;
}
/* Setup the client port */
RtlZeroMemory(ClientPort, sizeof(LPCP_PORT_OBJECT));
ClientPort->Flags = LPCP_CLIENT_PORT;
ClientPort->ConnectionPort = Port;
ClientPort->MaxMessageLength = Port->MaxMessageLength;
ClientPort->SecurityQos = *Qos;
InitializeListHead(&ClientPort->LpcReplyChainHead);
InitializeListHead(&ClientPort->LpcDataInfoChainHead);
/* Check if we have dynamic security */
if (Qos->ContextTrackingMode == SECURITY_DYNAMIC_TRACKING)
{
/* Remember that */
ClientPort->Flags |= LPCP_SECURITY_DYNAMIC;
}
else
{
/* Create our own client security */
Status = SeCreateClientSecurity(Thread,
Qos,
FALSE,
&ClientPort->StaticSecurity);
if (!NT_SUCCESS(Status))
{
/* Security failed, dereference and return */
ObDereferenceObject(ClientPort);
return Status;
}
}
/* Initialize the port queue */
Status = LpcpInitializePortQueue(ClientPort);
if (!NT_SUCCESS(Status))
{
/* Failed */
ObDereferenceObject(ClientPort);
return Status;
}
/* Check if we have a client view */
if (ClientView)
{
/* Get the section handle */
Status = ObReferenceObjectByHandle(ClientView->SectionHandle,
SECTION_MAP_READ |
SECTION_MAP_WRITE,
MmSectionObjectType,
PreviousMode,
(PVOID*)&SectionToMap,
NULL);
if (!NT_SUCCESS(Status))
{
/* Fail */
ObDereferenceObject(Port);
return Status;
}
/* Set the section offset */
SectionOffset.QuadPart = ClientView->SectionOffset;
/* Map it */
Status = MmMapViewOfSection(SectionToMap,
PsGetCurrentProcess(),
&ClientPort->ClientSectionBase,
0,
0,
&SectionOffset,
&ClientView->ViewSize,
ViewUnmap,
0,
PAGE_READWRITE);
/* Update the offset */
ClientView->SectionOffset = SectionOffset.LowPart;
/* Check for failure */
if (!NT_SUCCESS(Status))
{
/* Fail */
ObDereferenceObject(SectionToMap);
ObDereferenceObject(Port);
return Status;
}
/* Update the base */
ClientView->ViewBase = ClientPort->ClientSectionBase;
/* Reference and remember the process */
ClientPort->MappingProcess = PsGetCurrentProcess();
ObReferenceObject(ClientPort->MappingProcess);
}
else
{
/* No section */
SectionToMap = NULL;
}
/* Normalize connection information */
if (ConnectionInfoLength > Port->MaxConnectionInfoLength)
{
/* Use the port's maximum allowed value */
ConnectionInfoLength = Port->MaxConnectionInfoLength;
}
/* Allocate a message from the port zone */
Message = LpcpAllocateFromPortZone();
if (!Message)
{
/* Fail if we couldn't allocate a message */
if (SectionToMap) ObDereferenceObject(SectionToMap);
ObDereferenceObject(ClientPort);
return STATUS_NO_MEMORY;
}
/* Set pointer to the connection message and fill in the CID */
ConnectMessage = (PLPCP_CONNECTION_MESSAGE)(Message + 1);
Message->Request.ClientId = Thread->Cid;
/* Check if we have a client view */
if (ClientView)
{
/* Set the view size */
Message->Request.ClientViewSize = ClientView->ViewSize;
/* Copy the client view and clear the server view */
RtlCopyMemory(&ConnectMessage->ClientView,
ClientView,
sizeof(PORT_VIEW));
RtlZeroMemory(&ConnectMessage->ServerView, sizeof(REMOTE_PORT_VIEW));
}
else
{
/* Set the size to 0 and clear the connect message */
Message->Request.ClientViewSize = 0;
RtlZeroMemory(ConnectMessage, sizeof(LPCP_CONNECTION_MESSAGE));
}
/* Set the section and client port. Port is NULL for now */
ConnectMessage->ClientPort = NULL;
ConnectMessage->SectionToMap = SectionToMap;
/* Set the data for the connection request message */
Message->Request.u1.s1.DataLength = (CSHORT)ConnectionInfoLength +
sizeof(LPCP_CONNECTION_MESSAGE);
Message->Request.u1.s1.TotalLength = sizeof(LPCP_MESSAGE) +
Message->Request.u1.s1.DataLength;
Message->Request.u2.s2.Type = LPC_CONNECTION_REQUEST;
/* Check if we have connection information */
if (ConnectionInformation)
{
/* Copy it in */
RtlCopyMemory(ConnectMessage + 1,
ConnectionInformation,
ConnectionInfoLength);
}
/* Acquire the port lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Check if someone already deleted the port name */
if (Port->Flags & LPCP_NAME_DELETED)
{
/* Fail the request */
Status = STATUS_OBJECT_NAME_NOT_FOUND;
}
else
{
/* Associate no thread yet */
Message->RepliedToThread = NULL;
/* Generate the Message ID and set it */
Message->Request.MessageId = LpcpNextMessageId++;
if (!LpcpNextMessageId) LpcpNextMessageId = 1;
Thread->LpcReplyMessageId = Message->Request.MessageId;
/* Insert the message into the queue and thread chain */
InsertTailList(&Port->MsgQueue.ReceiveHead, &Message->Entry);
InsertTailList(&Port->LpcReplyChainHead, &Thread->LpcReplyChain);
Thread->LpcReplyMessage = Message;
/* Now we can finally reference the client port and link it*/
ObReferenceObject(ClientPort);
ConnectMessage->ClientPort = ClientPort;
/* Enter a critical region */
KeEnterCriticalRegion();
}
/* Add another reference to the port */
ObReferenceObject(Port);
/* Release the lock */
KeReleaseGuardedMutex(&LpcpLock);
/* Check for success */
if (NT_SUCCESS(Status))
{
LPCTRACE(LPC_CONNECT_DEBUG,
"Messages: %p/%p. Ports: %p/%p. Status: %lx\n",
Message,
ConnectMessage,
Port,
ClientPort,
Status);
/* If this is a waitable port, set the event */
if (Port->Flags & LPCP_WAITABLE_PORT) KeSetEvent(&Port->WaitEvent,
1,
FALSE);
/* Release the queue semaphore and leave the critical region */
LpcpCompleteWait(Port->MsgQueue.Semaphore);
KeLeaveCriticalRegion();
/* Now wait for a reply */
LpcpConnectWait(&Thread->LpcReplySemaphore, PreviousMode);
}
/* Check for failure */
if (!NT_SUCCESS(Status)) goto Cleanup;
/* Free the connection message */
SectionToMap = LpcpFreeConMsg(&Message, &ConnectMessage, Thread);
/* Check if we got a message back */
if (Message)
{
/* Check for new return length */
if ((Message->Request.u1.s1.DataLength -
sizeof(LPCP_CONNECTION_MESSAGE)) < ConnectionInfoLength)
{
/* Set new normalized connection length */
ConnectionInfoLength = Message->Request.u1.s1.DataLength -
sizeof(LPCP_CONNECTION_MESSAGE);
}
/* Check if we had connection information */
if (ConnectionInformation)
{
/* Check if we had a length pointer */
if (ConnectionInformationLength)
{
/* Return the length */
*ConnectionInformationLength = ConnectionInfoLength;
}
/* Return the connection information */
RtlCopyMemory(ConnectionInformation,
ConnectMessage + 1,
ConnectionInfoLength );
}
/* Make sure we had a connected port */
if (ClientPort->ConnectedPort)
{
/* Get the message length before the port might get killed */
PortMessageLength = Port->MaxMessageLength;
/* Insert the client port */
Status = ObInsertObject(ClientPort,
NULL,
PORT_ALL_ACCESS,
0,
(PVOID *)NULL,
&Handle);
if (NT_SUCCESS(Status))
{
/* Return the handle */
*PortHandle = Handle;
LPCTRACE(LPC_CONNECT_DEBUG,
"Handle: %p. Length: %lx\n",
Handle,
PortMessageLength);
/* Check if maximum length was requested */
if (MaxMessageLength) *MaxMessageLength = PortMessageLength;
/* Check if we had a client view */
if (ClientView)
{
/* Copy it back */
RtlCopyMemory(ClientView,
&ConnectMessage->ClientView,
sizeof(PORT_VIEW));
}
/* Check if we had a server view */
if (ServerView)
{
/* Copy it back */
RtlCopyMemory(ServerView,
&ConnectMessage->ServerView,
sizeof(REMOTE_PORT_VIEW));
}
}
}
else
{
/* No connection port, we failed */
if (SectionToMap) ObDereferenceObject(SectionToMap);
/* Acquire the lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Check if it's because the name got deleted */
if (!(ClientPort->ConnectionPort) ||
(Port->Flags & LPCP_NAME_DELETED))
{
/* Set the correct status */
Status = STATUS_OBJECT_NAME_NOT_FOUND;
}
else
{
/* Otherwise, the caller refused us */
Status = STATUS_PORT_CONNECTION_REFUSED;
}
/* Release the lock */
KeReleaseGuardedMutex(&LpcpLock);
/* Kill the port */
ObDereferenceObject(ClientPort);
}
/* Free the message */
LpcpFreeToPortZone(Message, 0);
}
else
{
/* No reply message, fail */
if (SectionToMap) ObDereferenceObject(SectionToMap);
ObDereferenceObject(ClientPort);
Status = STATUS_PORT_CONNECTION_REFUSED;
}
/* Return status */
ObDereferenceObject(Port);
return Status;
Cleanup:
/* We failed, free the message */
SectionToMap = LpcpFreeConMsg(&Message, &ConnectMessage, Thread);
/* Check if the semaphore got signaled */
if (KeReadStateSemaphore(&Thread->LpcReplySemaphore))
{
/* Wait on it */
KeWaitForSingleObject(&Thread->LpcReplySemaphore,
WrExecutive,
KernelMode,
FALSE,
NULL);
}
/* Check if we had a message and free it */
if (Message) LpcpFreeToPortZone(Message, 0);
/* Dereference other objects */
if (SectionToMap) ObDereferenceObject(SectionToMap);
ObDereferenceObject(ClientPort);
/* Return status */
ObDereferenceObject(Port);
return Status;
}
VOID
NTAPI
LpcpDeletePort(IN PVOID ObjectBody)
{
LARGE_INTEGER Timeout;
PETHREAD Thread;
PLPCP_PORT_OBJECT Port = (PLPCP_PORT_OBJECT)ObjectBody;
PLPCP_PORT_OBJECT ConnectionPort;
PLPCP_MESSAGE Message;
PLIST_ENTRY ListHead, NextEntry;
HANDLE Pid;
CLIENT_DIED_MSG ClientDiedMsg;
PAGED_CODE();
LPCTRACE(LPC_CLOSE_DEBUG, "Port: %p. Flags: %lx\n", Port, Port->Flags);
Timeout.QuadPart = -1000000;
/* Check if this is a communication port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) == LPCP_COMMUNICATION_PORT)
{
/* Acquire the lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Get the thread */
Thread = Port->ClientThread;
if (Thread)
{
/* Clear it */
Port->ClientThread = NULL;
/* Release the lock and dereference */
KeReleaseGuardedMutex(&LpcpLock);
ObDereferenceObject(Thread);
}
else
{
/* Release the lock */
KeReleaseGuardedMutex(&LpcpLock);
}
}
/* Check if this is a client-side port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) == LPCP_CLIENT_PORT)
{
/* Setup the client died message */
ClientDiedMsg.h.u1.s1.TotalLength = sizeof(ClientDiedMsg);
ClientDiedMsg.h.u1.s1.DataLength = sizeof(ClientDiedMsg.CreateTime);
ClientDiedMsg.h.u2.ZeroInit = 0;
ClientDiedMsg.h.u2.s2.Type = LPC_PORT_CLOSED;
ClientDiedMsg.CreateTime = PsGetCurrentProcess()->CreateTime;
/* Send it */
for (;;)
{
/* Send the message */
if (LpcRequestPort(Port, &ClientDiedMsg.h) != STATUS_NO_MEMORY)
break;
/* Wait until trying again */
KeDelayExecutionThread(KernelMode, FALSE, &Timeout);
}
}
/* Destroy the port queue */
LpcpDestroyPortQueue(Port, TRUE);
/* Check if we had views */
if ((Port->ClientSectionBase) || (Port->ServerSectionBase))
{
/* Check if we had a client view */
if (Port->ClientSectionBase)
{
/* Unmap it */
MmUnmapViewOfSection(Port->MappingProcess,
Port->ClientSectionBase);
}
/* Check for a server view */
if (Port->ServerSectionBase)
{
/* Unmap it */
MmUnmapViewOfSection(Port->MappingProcess,
Port->ServerSectionBase);
}
/* Dereference the mapping process */
ObDereferenceObject(Port->MappingProcess);
Port->MappingProcess = NULL;
}
/* Acquire the lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Get the connection port */
ConnectionPort = Port->ConnectionPort;
if (ConnectionPort)
{
/* Get the PID */
Pid = PsGetCurrentProcessId();
/* Loop the data lists */
ListHead = &ConnectionPort->LpcDataInfoChainHead;
NextEntry = ListHead->Flink;
while (NextEntry != ListHead)
{
/* Get the message */
Message = CONTAINING_RECORD(NextEntry, LPCP_MESSAGE, Entry);
NextEntry = NextEntry->Flink;
/* Check if this is the connection port */
if (Port == ConnectionPort)
{
/* Free queued messages */
RemoveEntryList(&Message->Entry);
InitializeListHead(&Message->Entry);
LpcpFreeToPortZone(Message, LPCP_LOCK_HELD);
/* Restart at the head */
NextEntry = ListHead->Flink;
}
else if ((Message->Request.ClientId.UniqueProcess == Pid) &&
((Message->SenderPort == Port) ||
(Message->SenderPort == Port->ConnectedPort) ||
(Message->SenderPort == ConnectionPort)))
{
/* Remove it */
RemoveEntryList(&Message->Entry);
InitializeListHead(&Message->Entry);
LpcpFreeToPortZone(Message, LPCP_LOCK_HELD);
/* Restart at the head */
NextEntry = ListHead->Flink;
}
}
/* Release the lock */
KeReleaseGuardedMutex(&LpcpLock);
/* Dereference the object unless it's the same port */
if (ConnectionPort != Port) ObDereferenceObject(ConnectionPort);
/* Check if this is a connection port with a server process */
if (((Port->Flags & LPCP_PORT_TYPE_MASK) == LPCP_CONNECTION_PORT) &&
(ConnectionPort->ServerProcess))
{
/* Dereference the server process */
ObDereferenceObject(ConnectionPort->ServerProcess);
ConnectionPort->ServerProcess = NULL;
}
}
else
{
/* Release the lock */
KeReleaseGuardedMutex(&LpcpLock);
}
/* Free client security */
LpcpFreePortClientSecurity(Port);
LPCTRACE(LPC_CLOSE_DEBUG, "Port: %p deleted\n", Port);
}
VOID
NTAPI
LpcpDestroyPortQueue(IN PLPCP_PORT_OBJECT Port,
IN BOOLEAN Destroy)
{
PLIST_ENTRY ListHead, NextEntry;
PETHREAD Thread;
PLPCP_MESSAGE Message;
PLPCP_PORT_OBJECT ConnectionPort = NULL;
PLPCP_CONNECTION_MESSAGE ConnectMessage;
PLPCP_NONPAGED_PORT_QUEUE MessageQueue;
PAGED_CODE();
LPCTRACE(LPC_CLOSE_DEBUG, "Port: %p. Flags: %lx\n", Port, Port->Flags);
/* Hold the lock */
KeAcquireGuardedMutex(&LpcpLock);
/* Check if we have a connected port */
if (((Port->Flags & LPCP_PORT_TYPE_MASK) != LPCP_UNCONNECTED_PORT) &&
(Port->ConnectedPort))
{
/* Disconnect it */
Port->ConnectedPort->ConnectedPort = NULL;
ConnectionPort = Port->ConnectedPort->ConnectionPort;
if (ConnectionPort)
{
/* Clear connection port */
Port->ConnectedPort->ConnectionPort = NULL;
}
}
/* Check if this is a connection port */
if ((Port->Flags & LPCP_PORT_TYPE_MASK) == LPCP_CONNECTION_PORT)
{
/* Delete the name */
Port->Flags |= LPCP_NAME_DELETED;
}
/* Walk all the threads waiting and signal them */
ListHead = &Port->LpcReplyChainHead;
NextEntry = ListHead->Flink;
while ((NextEntry) && (NextEntry != ListHead))
{
/* Get the Thread */
Thread = CONTAINING_RECORD(NextEntry, ETHREAD, LpcReplyChain);
/* Make sure we're not in exit */
if (Thread->LpcExitThreadCalled) break;
/* Move to the next entry */
NextEntry = NextEntry->Flink;
/* Remove and reinitialize the List */
RemoveEntryList(&Thread->LpcReplyChain);
InitializeListHead(&Thread->LpcReplyChain);
/* Check if someone is waiting */
if (!KeReadStateSemaphore(&Thread->LpcReplySemaphore))
{
/* Get the message */
Message = LpcpGetMessageFromThread(Thread);
if (Message)
{
/* Check if it's a connection request */
if (Message->Request.u2.s2.Type == LPC_CONNECTION_REQUEST)
{
/* Get the connection message */
ConnectMessage = (PLPCP_CONNECTION_MESSAGE)(Message + 1);
/* Check if it had a section */
if (ConnectMessage->SectionToMap)
{
/* Dereference it */
ObDereferenceObject(ConnectMessage->SectionToMap);
}
}
/* Clear the reply message */
Thread->LpcReplyMessage = NULL;
/* And remove the message from the port zone */
LpcpFreeToPortZone(Message, LPCP_LOCK_HELD);
NextEntry = Port->LpcReplyChainHead.Flink;
}
/* Release the semaphore and reset message id count */
Thread->LpcReplyMessageId = 0;
KeReleaseSemaphore(&Thread->LpcReplySemaphore, 0, 1, FALSE);
}
}
/* Reinitialize the list head */
InitializeListHead(&Port->LpcReplyChainHead);
/* Loop queued messages */
while ((Port->MsgQueue.ReceiveHead.Flink) &&
!(IsListEmpty(&Port->MsgQueue.ReceiveHead)))
{
/* Get the message */
Message = CONTAINING_RECORD(Port->MsgQueue.ReceiveHead.Flink,
LPCP_MESSAGE,
Entry);
/* Free and reinitialize it's list head */
RemoveEntryList(&Message->Entry);
InitializeListHead(&Message->Entry);
/* Remove it from the port zone */
LpcpFreeToPortZone(Message, LPCP_LOCK_HELD);
}
/* Release the lock */
KeReleaseGuardedMutex(&LpcpLock);
/* Dereference the connection port */
if (ConnectionPort) ObDereferenceObject(ConnectionPort);
/* Check if we have to free the port entirely */
if (Destroy)
{
/* Check if the semaphore exists */
if (Port->MsgQueue.Semaphore)
{
/* Use the semaphore to find the port queue and free it */
MessageQueue = CONTAINING_RECORD(Port->MsgQueue.Semaphore,
LPCP_NONPAGED_PORT_QUEUE,
Semaphore);
ExFreePoolWithTag(MessageQueue, 'troP');
}
}
}
