VOID CancelAllEvents()
/*++
Routine Description:
取消所有还未来得及处理的违规操作
Arguments:
None.
Return Value:
None.
Comments:
该函数可以在Ring3进程退出时和驱动卸载时调用
Author:
Fypher
*/
{
PLIST_ENTRY pEntry;
PEVENTDATA pEvtData;
PAGED_CODE();
InterlockedExchange(&g_ulEventDataCount, MAX_EVENT_IN_LIST + 1);
while(KeReadStateSemaphore(&g_EventDataSemaphore)){
KeWaitForSingleObject(&g_EventDataSemaphore, Executive, KernelMode, FALSE, NULL);
pEntry = ExInterlockedRemoveHeadList(&g_EventDataLinkListHead, &g_EventDataLock);
pEvtData = CONTAINING_RECORD(pEntry, EVENTDATA, ListEntry);
pEvtData->ulJudgment = JUDGMENT_REFUSE;
KeSetEvent(&pEvtData->evt, IO_NO_INCREMENT, FALSE);
}
InterlockedExchange(&g_ulEventDataCount, 0);
}
/*
* @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
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');
}
}
}
