[ros-diffs] [ion] 24673: - Implement NtRequestWaitReplyPort. This is a simple implementation that doesn't support Callback LPC Messages yet (Since we don't make use of them). SMSS can now send API messages on the Sb Port. - With these APIs we now have a skeleton NTLPC that is fully NT-compatible. Thanks to ea's (Emanuele)'s smss work which he strived to make portable, building with NTLPC = 1 will also build a compatible smss that now works. - CSRSS requires some changes since it was not written to be NTLPC portable.
ion at svn.reactos.org
ion at svn.reactos.org
Mon Oct 30 15:50:32 CET 2006
Author: ion
Date: Mon Oct 30 17:50:31 2006
New Revision: 24673
URL: http://svn.reactos.org/svn/reactos?rev=24673&view=rev
Log:
- Implement NtRequestWaitReplyPort. This is a simple implementation that doesn't support Callback LPC Messages yet (Since we don't make use of them). SMSS can now send API messages on the Sb Port.
- With these APIs we now have a skeleton NTLPC that is fully NT-compatible. Thanks to ea's (Emanuele)'s smss work which he strived to make portable, building with NTLPC = 1 will also build a compatible smss that now works.
- CSRSS requires some changes since it was not written to be NTLPC portable.
Modified:
trunk/reactos/ntoskrnl/lpc/ntlpc/send.c
Modified: trunk/reactos/ntoskrnl/lpc/ntlpc/send.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/lpc/ntlpc/send.c?rev=24673&r1=24672&r2=24673&view=diff
==============================================================================
--- trunk/reactos/ntoskrnl/lpc/ntlpc/send.c (original)
+++ trunk/reactos/ntoskrnl/lpc/ntlpc/send.c Mon Oct 30 17:50:31 2006
@@ -61,8 +61,251 @@
IN PPORT_MESSAGE LpcRequest,
IN OUT PPORT_MESSAGE LpcReply)
{
- UNIMPLEMENTED;
- return STATUS_NOT_IMPLEMENTED;
+ PLPCP_PORT_OBJECT Port, QueuePort, ReplyPort;
+ 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 ((LpcRequest->u1.s1.DataLength + sizeof(PORT_MESSAGE)) >
+ 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 ((LpcRequest->u1.s1.TotalLength > Port->MaxMessageLength) ||
+ (LpcRequest->u1.s1.TotalLength <= LpcRequest->u1.s1.DataLength))
+ {
+ /* Fail */
+ ObDereferenceObject(Port);
+ return STATUS_PORT_MESSAGE_TOO_LONG;
+ }
+
+ /* Acquire the lock */
+ KeAcquireGuardedMutex(&LpcpLock);
+
+ /* Allocate a message */
+ Message = ExAllocateFromPagedLookasideList(&LpcpMessagesLookaside);
+ KeReleaseGuardedMutex(&LpcpLock);
+
+ /* Check if allocation worked */
+ if (!Message)
+ {
+ /* Fail */
+ 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 */
+ LpcpMoveMessage(&Message->Request,
+ LpcRequest,
+ LpcRequest + 1,
+ MessageType,
+ &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, TRUE);
+ KeReleaseGuardedMutex(&LpcpLock);
+ 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 = ReplyPort->PortContext;
+ QueuePort = Port->ConnectionPort;
+ }
+ else if ((Port->Flags & LPCP_PORT_TYPE_MASK) !=
+ LPCP_COMMUNICATION_PORT)
+ {
+ /* Use the connection port for anything but communication ports */
+ QueuePort = Port->ConnectionPort;
+ }
+ }
+ else
+ {
+ /* Otherwise, for a connection port, use the same port object */
+ QueuePort = ReplyPort = Port;
+ }
+
+ /* No reply thread */
+ Message->RepliedToThread = NULL;
+
+ /* 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);
+
+ /* Release the lock and get the semaphore we'll use later */
+ 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);
+
+ /* 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 = Thread->LpcReplyMessage;
+ 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);
+
+ /* 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);
+ }
+ else
+ {
+ /* Otherwise, just free it */
+ LpcpFreeToPortZone(Message, FALSE);
+ }
+ }
+ else
+ {
+ /* We don't have a reply */
+ Status = STATUS_LPC_REPLY_LOST;
+ }
+ }
+ else
+ {
+ /* The wait failed, free the message while holding the lock */
+ KeAcquireGuardedMutex(&LpcpLock);
+ LpcpFreeToPortZone(Message, TRUE);
+ KeReleaseGuardedMutex(&LpcpLock);
+ }
+
+ /* All done */
+ LPCTRACE(LPC_SEND_DEBUG,
+ "Port: %p. Status: %p\n",
+ Port,
+ Status);
+ ObDereferenceObject(Port);
+ return Status;
}
/* EOF */
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