/* * subsystems/win32/csrss/csrsrv/api/wapi.c * * "\windows\ApiPort" port process management functions * CSRSS port message processing * * ReactOS Operating System * */ /* INCLUDES ******************************************************************/ #include #define NDEBUG #include /* GLOBALS *******************************************************************/ static unsigned ApiDefinitionsCount = 0; static PCSRSS_API_DEFINITION ApiDefinitions = NULL; UNICODE_STRING CsrApiPortName; volatile LONG CsrpStaticThreadCount; volatile LONG CsrpDynamicThreadTotal; extern ULONG CsrMaxApiRequestThreads; /* FUNCTIONS *****************************************************************/ #if 0 NTSTATUS FASTCALL CsrApiRegisterDefinitions(PCSRSS_API_DEFINITION NewDefinitions) { unsigned NewCount; PCSRSS_API_DEFINITION Scan; PCSRSS_API_DEFINITION New; DPRINT("CSR: %s called\n", __FUNCTION__); NewCount = 0; for (Scan = NewDefinitions; 0 != Scan->Handler; Scan++) { NewCount++; } New = RtlAllocateHeap(CsrHeap, 0, (ApiDefinitionsCount + NewCount) * sizeof(CSRSS_API_DEFINITION)); if (NULL == New) { DPRINT1("Unable to allocate memory\n"); return STATUS_NO_MEMORY; } if (0 != ApiDefinitionsCount) { RtlCopyMemory(New, ApiDefinitions, ApiDefinitionsCount * sizeof(CSRSS_API_DEFINITION)); RtlFreeHeap(CsrHeap, 0, ApiDefinitions); } RtlCopyMemory(New + ApiDefinitionsCount, NewDefinitions, NewCount * sizeof(CSRSS_API_DEFINITION)); ApiDefinitions = New; ApiDefinitionsCount += NewCount; return STATUS_SUCCESS; } #endif /* VOID FASTCALL CsrApiCallHandler(PCSR_PROCESS ProcessData, PCSR_API_MESSAGE Request) */ VOID FASTCALL CsrApiCallHandler( IN OUT PCSR_API_MESSAGE ApiMessage, OUT PULONG Reply ) { unsigned DefIndex; ULONG ApiId; DPRINT("CSR: Calling handler for ApiNumber: %x.\n", ApiMessage->ApiNumber); ApiId = CSR_API_NUMBER_TO_API_ID(ApiMessage->ApiNumber); DPRINT("CSR: ApiID: %x ServerID: %x\n", ApiId, CSR_API_NUMBER_TO_SERVER_ID(ApiMessage->ApiNumber)); /* FIXME: Extract DefIndex instead of looping */ for (DefIndex = 0; DefIndex < ApiDefinitionsCount; DefIndex++) { if (ApiDefinitions[DefIndex].ApiID == ApiId) { if (ApiMessage->Header.u1.s1.DataLength < ApiDefinitions[DefIndex].MinRequestSize) { DPRINT1("Request ApiID %d min request size %d actual %d\n", ApiId, ApiDefinitions[DefIndex].MinRequestSize, ApiMessage->Header.u1.s1.DataLength); ApiMessage->Status = STATUS_INVALID_PARAMETER; } else { ApiMessage->Status = (ApiDefinitions[DefIndex].Handler)(ApiMessage, Reply); } return; } } DPRINT1("CSR: Unknown request ApiNumber 0x%x\n", ApiMessage->ApiNumber); ApiMessage->Status = STATUS_INVALID_SYSTEM_SERVICE; } VOID CallHardError(IN PCSR_THREAD ThreadData, IN PHARDERROR_MSG HardErrorMessage); static VOID NTAPI CsrHandleHardError(IN PCSR_THREAD ThreadData, IN OUT PHARDERROR_MSG Message) { DPRINT1("CSR: received hard error %lx\n", Message->Status); /* Call the hard error handler in win32csr */ CallHardError(ThreadData, Message); } /*++ * @name CsrCallServerFromServer * @implemented NT4 * * The CsrCallServerFromServer routine calls a CSR API from within a server. * It avoids using LPC messages since the request isn't coming from a client. * * @param ReceiveMsg * Pointer to the CSR API Message to send to the server. * * @param ReplyMsg * Pointer to the CSR API Message to receive from the server. * * @return STATUS_SUCCESS in case of success, STATUS_ILLEGAL_FUNCTION * if the ApiNumber is invalid, or STATUS_ACCESS_VIOLATION if there * was a problem executing the API. * * @remarks None. * *--*/ NTSTATUS NTAPI CsrCallServerFromServer(PCSR_API_MESSAGE ReceiveMsg, PCSR_API_MESSAGE ReplyMsg) { #if 1 // Real code ULONG ServerId; PCSR_SERVER_DLL ServerDll; ULONG ApiId; ULONG Reply; NTSTATUS Status; /* Get the Server ID */ ServerId = CSR_SERVER_ID_FROM_OPCODE(ReceiveMsg->ApiNumber); /* Make sure that the ID is within limits, and the Server DLL loaded */ if ((ServerId >= CSR_SERVER_DLL_MAX) || (!(ServerDll = CsrLoadedServerDll[ServerId]))) { /* We are beyond the Maximum Server ID */ DPRINT1("CSRSS: %lx is invalid ServerDllIndex (%08x)\n", ServerId, ServerDll); ReplyMsg->Status = (ULONG)STATUS_ILLEGAL_FUNCTION; return STATUS_ILLEGAL_FUNCTION; } else { /* Get the API ID */ ApiId = CSR_API_NUMBER_TO_API_ID(ReceiveMsg->ApiNumber); /* Normalize it with our Base ID */ ApiId -= ServerDll->ApiBase; /* Make sure that the ID is within limits, and the entry exists */ if ((ApiId >= ServerDll->HighestApiSupported) || ((ServerDll->ValidTable) && !(ServerDll->ValidTable[ApiId]))) { /* We are beyond the Maximum API ID, or it doesn't exist */ DPRINT1("CSRSS: %lx (%s) is invalid ApiTableIndex for %Z or is an " "invalid API to call from the server.\n", ServerDll->ValidTable[ApiId], ((ServerDll->NameTable) && (ServerDll->NameTable[ApiId])) ? ServerDll->NameTable[ApiId] : "*** UNKNOWN ***", &ServerDll->Name); DbgBreakPoint(); ReplyMsg->Status = (ULONG)STATUS_ILLEGAL_FUNCTION; return STATUS_ILLEGAL_FUNCTION; } } if (CsrDebug & 2) { DPRINT1("CSRSS: %s Api Request received from server process\n", ServerDll->NameTable[ApiId]); } /* Validation complete, start SEH */ _SEH2_TRY { /* Call the API and get the result */ /// CsrApiCallHandler(ReplyMsg, /*ProcessData*/ &ReplyCode); /// Status = (ServerDll->DispatchTable[ApiId])(ReceiveMsg, &Reply); /* Return the result, no matter what it is */ ReplyMsg->Status = Status; } _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER) { /* If we got an exception, return access violation */ ReplyMsg->Status = STATUS_ACCESS_VIOLATION; } _SEH2_END; /* Return success */ return STATUS_SUCCESS; #else // Hacky reactos code PCSR_PROCESS ProcessData; ULONG ReplyCode; /* Get the Process Data */ CsrLockProcessByClientId(&ReceiveMsg->Header.ClientId.UniqueProcess, &ProcessData); if (!ProcessData) { DPRINT1("Message: Unable to find data for process 0x%x\n", ReceiveMsg->Header.ClientId.UniqueProcess); return STATUS_NOT_SUPPORTED; } /* Validation complete, start SEH */ _SEH2_TRY { /* Call the API and get the result */ CsrApiCallHandler(ReplyMsg, /*ProcessData*/ &ReplyCode); } _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER) { /* If we got an exception, return access violation */ ReplyMsg->Status = STATUS_ACCESS_VIOLATION; } _SEH2_END; /* Release the process reference */ CsrUnlockProcess(ProcessData); /* Return success */ return STATUS_SUCCESS; #endif } /*++ * @name CsrApiPortInitialize * * The CsrApiPortInitialize routine initializes the LPC Port used for * communications with the Client/Server Runtime (CSR) and initializes the * static thread that will handle connection requests and APIs. * * @param None * * @return STATUS_SUCCESS in case of success, STATUS_UNSUCCESSFUL * otherwise. * * @remarks None. * *--*/ NTSTATUS NTAPI CsrApiPortInitialize(VOID) { ULONG Size; OBJECT_ATTRIBUTES ObjectAttributes; NTSTATUS Status; HANDLE hRequestEvent, hThread; CLIENT_ID ClientId; PLIST_ENTRY ListHead, NextEntry; PCSR_THREAD ServerThread; /* Calculate how much space we'll need for the Port Name */ Size = CsrDirectoryName.Length + sizeof(CSR_PORT_NAME) + sizeof(WCHAR); /* Create the buffer for it */ CsrApiPortName.Buffer = RtlAllocateHeap(CsrHeap, 0, Size); if (!CsrApiPortName.Buffer) return STATUS_NO_MEMORY; /* Setup the rest of the empty string */ CsrApiPortName.Length = 0; CsrApiPortName.MaximumLength = (USHORT)Size; RtlAppendUnicodeStringToString(&CsrApiPortName, &CsrDirectoryName); RtlAppendUnicodeToString(&CsrApiPortName, UNICODE_PATH_SEP); RtlAppendUnicodeToString(&CsrApiPortName, CSR_PORT_NAME); if (CsrDebug & 1) { DPRINT1("CSRSS: Creating %wZ port and associated threads\n", &CsrApiPortName); DPRINT1("CSRSS: sizeof( CONNECTINFO ) == %ld sizeof( API_MSG ) == %ld\n", sizeof(CSR_CONNECTION_INFO), sizeof(CSR_API_MESSAGE)); } /* FIXME: Create a Security Descriptor */ /* Initialize the Attributes */ InitializeObjectAttributes(&ObjectAttributes, &CsrApiPortName, 0, NULL, NULL /* FIXME*/); /* Create the Port Object */ Status = NtCreatePort(&CsrApiPort, &ObjectAttributes, LPC_MAX_DATA_LENGTH, // hack ; sizeof(CSR_CONNECTION_INFO), LPC_MAX_MESSAGE_LENGTH, // hack ; sizeof(CSR_API_MESSAGE), 16 * PAGE_SIZE); if (NT_SUCCESS(Status)) { /* Create the event the Port Thread will use */ Status = NtCreateEvent(&hRequestEvent, EVENT_ALL_ACCESS, NULL, SynchronizationEvent, FALSE); if (NT_SUCCESS(Status)) { /* Create the Request Thread */ Status = RtlCreateUserThread(NtCurrentProcess(), NULL, TRUE, 0, 0, 0, (PVOID)ClientConnectionThread,//CsrApiRequestThread, (PVOID)hRequestEvent, &hThread, &ClientId); if (NT_SUCCESS(Status)) { /* Add this as a static thread to CSRSRV */ CsrAddStaticServerThread(hThread, &ClientId, CsrThreadIsServerThread); /* Get the Thread List Pointers */ ListHead = &CsrRootProcess->ThreadList; NextEntry = ListHead->Flink; /* Start looping the list */ while (NextEntry != ListHead) { /* Get the Thread */ ServerThread = CONTAINING_RECORD(NextEntry, CSR_THREAD, Link); /* Start it up */ Status = NtResumeThread(ServerThread->ThreadHandle, NULL); /* Is this a Server Thread? */ if (ServerThread->Flags & CsrThreadIsServerThread) { /* If so, then wait for it to initialize */ Status = NtWaitForSingleObject(hRequestEvent, FALSE, NULL); ASSERT(NT_SUCCESS(Status)); } /* Next thread */ NextEntry = NextEntry->Flink; } /* We don't need this anymore */ NtClose(hRequestEvent); } } } /* Return */ return Status; } PBASE_STATIC_SERVER_DATA BaseStaticServerData; NTSTATUS NTAPI CreateBaseAcls(OUT PACL* Dacl, OUT PACL* RestrictedDacl) { PSID SystemSid, WorldSid, RestrictedSid; SID_IDENTIFIER_AUTHORITY NtAuthority = {SECURITY_NT_AUTHORITY}; SID_IDENTIFIER_AUTHORITY WorldAuthority = {SECURITY_WORLD_SID_AUTHORITY}; NTSTATUS Status; UCHAR KeyValueBuffer[0x40]; PKEY_VALUE_PARTIAL_INFORMATION KeyValuePartialInfo; UNICODE_STRING KeyName; ULONG ProtectionMode = 0; ULONG AclLength, ResultLength; HANDLE hKey; OBJECT_ATTRIBUTES ObjectAttributes; /* Open the Session Manager Key */ RtlInitUnicodeString(&KeyName, SM_REG_KEY); InitializeObjectAttributes(&ObjectAttributes, &KeyName, OBJ_CASE_INSENSITIVE, NULL, NULL); Status = NtOpenKey(&hKey, KEY_READ, &ObjectAttributes); if (NT_SUCCESS(Status)) { /* Read the key value */ RtlInitUnicodeString(&KeyName, L"ProtectionMode"); Status = NtQueryValueKey(hKey, &KeyName, KeyValuePartialInformation, KeyValueBuffer, sizeof(KeyValueBuffer), &ResultLength); /* Make sure it's what we expect it to be */ KeyValuePartialInfo = (PKEY_VALUE_PARTIAL_INFORMATION)KeyValueBuffer; if ((NT_SUCCESS(Status)) && (KeyValuePartialInfo->Type == REG_DWORD) && (*(PULONG)KeyValuePartialInfo->Data)) { /* Save the Protection Mode */ ProtectionMode = *(PULONG)KeyValuePartialInfo->Data; } /* Close the handle */ NtClose(hKey); } /* Allocate the System SID */ Status = RtlAllocateAndInitializeSid(&NtAuthority, 1, SECURITY_LOCAL_SYSTEM_RID, 0, 0, 0, 0, 0, 0, 0, &SystemSid); ASSERT(NT_SUCCESS(Status)); /* Allocate the World SID */ Status = RtlAllocateAndInitializeSid(&WorldAuthority, 1, SECURITY_WORLD_RID, 0, 0, 0, 0, 0, 0, 0, &WorldSid); ASSERT(NT_SUCCESS(Status)); /* Allocate the restricted SID */ Status = RtlAllocateAndInitializeSid(&NtAuthority, 1, SECURITY_RESTRICTED_CODE_RID, 0, 0, 0, 0, 0, 0, 0, &RestrictedSid); ASSERT(NT_SUCCESS(Status)); /* Allocate one ACL with 3 ACEs each for one SID */ AclLength = sizeof(ACL) + 3 * sizeof(ACCESS_ALLOWED_ACE) + RtlLengthSid(SystemSid) + RtlLengthSid(RestrictedSid) + RtlLengthSid(WorldSid); *Dacl = RtlAllocateHeap(CsrHeap, 0, AclLength); ASSERT(*Dacl != NULL); /* Set the correct header fields */ Status = RtlCreateAcl(*Dacl, AclLength, ACL_REVISION2); ASSERT(NT_SUCCESS(Status)); /* Give the appropriate rights to each SID */ /* FIXME: Should check SessionId/ProtectionMode */ Status = RtlAddAccessAllowedAce(*Dacl, ACL_REVISION2, DIRECTORY_QUERY | DIRECTORY_TRAVERSE | DIRECTORY_CREATE_OBJECT | DIRECTORY_CREATE_SUBDIRECTORY | READ_CONTROL, WorldSid); ASSERT(NT_SUCCESS(Status)); Status = RtlAddAccessAllowedAce(*Dacl, ACL_REVISION2, DIRECTORY_ALL_ACCESS, SystemSid); ASSERT(NT_SUCCESS(Status)); Status = RtlAddAccessAllowedAce(*Dacl, ACL_REVISION2, DIRECTORY_TRAVERSE, RestrictedSid); ASSERT(NT_SUCCESS(Status)); /* Now allocate the restricted DACL */ *RestrictedDacl = RtlAllocateHeap(CsrHeap, 0, AclLength); ASSERT(*RestrictedDacl != NULL); /* Initialize it */ Status = RtlCreateAcl(*RestrictedDacl, AclLength, ACL_REVISION2); ASSERT(NT_SUCCESS(Status)); /* And add the same ACEs as before */ /* FIXME: Not really fully correct */ Status = RtlAddAccessAllowedAce(*RestrictedDacl, ACL_REVISION2, DIRECTORY_QUERY | DIRECTORY_TRAVERSE | DIRECTORY_CREATE_OBJECT | DIRECTORY_CREATE_SUBDIRECTORY | READ_CONTROL, WorldSid); ASSERT(NT_SUCCESS(Status)); Status = RtlAddAccessAllowedAce(*RestrictedDacl, ACL_REVISION2, DIRECTORY_ALL_ACCESS, SystemSid); ASSERT(NT_SUCCESS(Status)); Status = RtlAddAccessAllowedAce(*RestrictedDacl, ACL_REVISION2, DIRECTORY_TRAVERSE, RestrictedSid); ASSERT(NT_SUCCESS(Status)); /* The SIDs are captured, can free them now */ RtlFreeHeap(CsrHeap, 0, SystemSid); RtlFreeHeap(CsrHeap, 0, WorldSid); RtlFreeHeap(CsrHeap, 0, RestrictedSid); return Status; } NTSTATUS WINAPI CsrpHandleConnectionRequest(PPORT_MESSAGE Request) { NTSTATUS Status; HANDLE ServerPort = NULL;//, ServerThread = NULL; PCSR_PROCESS ProcessData = NULL; REMOTE_PORT_VIEW RemotePortView; // CLIENT_ID ClientId; BOOLEAN AllowConnection = FALSE; PCSR_CONNECTION_INFO ConnectInfo; ServerPort = NULL; DPRINT("CSR: %s: Handling: %p\n", __FUNCTION__, Request); ConnectInfo = (PCSR_CONNECTION_INFO)(Request + 1); /* Save the process ID */ RtlZeroMemory(ConnectInfo, sizeof(CSR_CONNECTION_INFO)); CsrLockProcessByClientId(Request->ClientId.UniqueProcess, &ProcessData); if (!ProcessData) { DPRINT1("CSRSRV: Unknown process: %lx. Will be rejecting connection\n", Request->ClientId.UniqueProcess); } if ((ProcessData) && (ProcessData != CsrRootProcess)) { /* Attach the Shared Section */ Status = CsrSrvAttachSharedSection(ProcessData, ConnectInfo); if (NT_SUCCESS(Status)) { DPRINT("Connection ok\n"); AllowConnection = TRUE; } else { DPRINT1("Shared section map failed: %lx\n", Status); } } else if (ProcessData == CsrRootProcess) { AllowConnection = TRUE; } /* Release the process */ if (ProcessData) CsrUnlockProcess(ProcessData); /* Setup the Port View Structure */ RemotePortView.Length = sizeof(REMOTE_PORT_VIEW); RemotePortView.ViewSize = 0; RemotePortView.ViewBase = NULL; /* Save the Process ID */ ConnectInfo->ProcessId = NtCurrentTeb()->ClientId.UniqueProcess; Status = NtAcceptConnectPort(&ServerPort, AllowConnection ? UlongToPtr(ProcessData->SequenceNumber) : 0, Request, AllowConnection, NULL, &RemotePortView); if (!NT_SUCCESS(Status)) { DPRINT1("CSRSS: NtAcceptConnectPort - failed. Status == %X\n", Status); } else if (AllowConnection) { if (CsrDebug & 2) { DPRINT1("CSRSS: ClientId: %lx.%lx has ClientView: Base=%p, Size=%lx\n", Request->ClientId.UniqueProcess, Request->ClientId.UniqueThread, RemotePortView.ViewBase, RemotePortView.ViewSize); } /* Set some Port Data in the Process */ ProcessData->ClientPort = ServerPort; ProcessData->ClientViewBase = (ULONG_PTR)RemotePortView.ViewBase; ProcessData->ClientViewBounds = (ULONG_PTR)((ULONG_PTR)RemotePortView.ViewBase + (ULONG_PTR)RemotePortView.ViewSize); /* Complete the connection */ Status = NtCompleteConnectPort(ServerPort); if (!NT_SUCCESS(Status)) { DPRINT1("CSRSS: NtCompleteConnectPort - failed. Status == %X\n", Status); } } else { DPRINT1("CSRSS: Rejecting Connection Request from ClientId: %lx.%lx\n", Request->ClientId.UniqueProcess, Request->ClientId.UniqueThread); } return Status; } /*++ * @name CsrConnectToUser * @implemented NT4 * * The CsrConnectToUser connects to the User subsystem. * * @param None * * @return A pointer to the CSR Thread * * @remarks None. * *--*/ PCSR_THREAD NTAPI CsrConnectToUser(VOID) { PTEB Teb = NtCurrentTeb(); PCSR_THREAD CsrThread; #if 0 NTSTATUS Status; ANSI_STRING DllName; UNICODE_STRING TempName; HANDLE hUser32; STRING StartupName; /* Check if we didn't already find it */ if (!CsrClientThreadSetup) { /* Get the DLL Handle for user32.dll */ RtlInitAnsiString(&DllName, "user32"); RtlAnsiStringToUnicodeString(&TempName, &DllName, TRUE); Status = LdrGetDllHandle(NULL, NULL, &TempName, &hUser32); RtlFreeUnicodeString(&TempName); /* If we got teh handle, get the Client Thread Startup Entrypoint */ if (NT_SUCCESS(Status)) { RtlInitAnsiString(&StartupName,"ClientThreadSetup"); Status = LdrGetProcedureAddress(hUser32, &StartupName, 0, (PVOID)&CsrClientThreadSetup); } } /* Connect to user32 */ CsrClientThreadSetup(); #endif /* Save pointer to this thread in TEB */ CsrThread = CsrLocateThreadInProcess(NULL, &Teb->ClientId); if (CsrThread) Teb->CsrClientThread = CsrThread; /* Return it */ return CsrThread; } /*++ * @name CsrpCheckRequestThreads * * The CsrpCheckRequestThreads routine checks if there are no more threads * to handle CSR API Requests, and creates a new thread if possible, to * avoid starvation. * * @param None. * * @return STATUS_SUCCESS in case of success, STATUS_UNSUCCESSFUL * if a new thread couldn't be created. * * @remarks None. * *--*/ NTSTATUS NTAPI CsrpCheckRequestThreads(VOID) { HANDLE hThread; CLIENT_ID ClientId; NTSTATUS Status; /* Decrease the count, and see if we're out */ if (!(_InterlockedDecrement(&CsrpStaticThreadCount))) { /* Check if we've still got space for a Dynamic Thread */ if (CsrpDynamicThreadTotal < CsrMaxApiRequestThreads) { /* Create a new dynamic thread */ Status = RtlCreateUserThread(NtCurrentProcess(), NULL, TRUE, 0, 0, 0, (PVOID)ClientConnectionThread,//CsrApiRequestThread, NULL, &hThread, &ClientId); /* Check success */ if (NT_SUCCESS(Status)) { /* Increase the thread counts */ _InterlockedIncrement(&CsrpStaticThreadCount); _InterlockedIncrement(&CsrpDynamicThreadTotal); /* Add a new server thread */ if (CsrAddStaticServerThread(hThread, &ClientId, CsrThreadIsServerThread)) { /* Activate it */ NtResumeThread(hThread, NULL); } else { /* Failed to create a new static thread */ _InterlockedDecrement(&CsrpStaticThreadCount); _InterlockedDecrement(&CsrpDynamicThreadTotal); /* Terminate it */ DPRINT1("Failing\n"); NtTerminateThread(hThread, 0); NtClose(hThread); /* Return */ return STATUS_UNSUCCESSFUL; } } } } /* Success */ return STATUS_SUCCESS; } VOID WINAPI ClientConnectionThread(IN PVOID Parameter) { PTEB Teb = NtCurrentTeb(); LARGE_INTEGER TimeOut; NTSTATUS Status; BYTE RawRequest[LPC_MAX_DATA_LENGTH]; PCSR_API_MESSAGE Request = (PCSR_API_MESSAGE)RawRequest; PCSR_API_MESSAGE Reply; PCSR_PROCESS CsrProcess; PCSR_THREAD ServerThread, CsrThread; ULONG MessageType; HANDLE ReplyPort; PDBGKM_MSG DebugMessage; PHARDERROR_MSG HardErrorMsg; PCLIENT_DIED_MSG ClientDiedMsg; DPRINT("CSR: %s called\n", __FUNCTION__); /* Setup LPC loop port and message */ Reply = NULL; ReplyPort = CsrApiPort; /* Connect to user32 */ while (!CsrConnectToUser()) { /* Set up the timeout for the connect (30 seconds) */ TimeOut.QuadPart = -30 * 1000 * 1000 * 10; /* Keep trying until we get a response */ Teb->Win32ClientInfo[0] = 0; NtDelayExecution(FALSE, &TimeOut); } /* Get our thread */ ServerThread = Teb->CsrClientThread; /* If we got an event... */ if (Parameter) { /* Set it, to let stuff waiting on us load */ Status = NtSetEvent((HANDLE)Parameter, NULL); ASSERT(NT_SUCCESS(Status)); /* Increase the Thread Counts */ _InterlockedIncrement(&CsrpStaticThreadCount); _InterlockedIncrement(&CsrpDynamicThreadTotal); } /* Now start the loop */ while (TRUE) { /* Make sure the real CID is set */ Teb->RealClientId = Teb->ClientId; /* Debug check */ if (Teb->CountOfOwnedCriticalSections) { DPRINT1("CSRSRV: FATAL ERROR. CsrThread is Idle while holding %lu critical sections\n", Teb->CountOfOwnedCriticalSections); DPRINT1("CSRSRV: Last Receive Message %lx ReplyMessage %lx\n", Request, Reply); DbgBreakPoint(); } /* Send the reply and wait for a new request */ DPRINT("Replying to: %lx (%lx)\n", ReplyPort, CsrApiPort); Status = NtReplyWaitReceivePort(ReplyPort, 0, &Reply->Header, &Request->Header); /* Check if we didn't get success */ if (Status != STATUS_SUCCESS) { /* Was it a failure or another success code? */ if (!NT_SUCCESS(Status)) { /* Check for specific status cases */ if ((Status != STATUS_INVALID_CID) && (Status != STATUS_UNSUCCESSFUL) && ((Status == STATUS_INVALID_HANDLE) || (ReplyPort == CsrApiPort))) { /* Notify the debugger */ DPRINT1("CSRSS: ReceivePort failed - Status == %X\n", Status); DPRINT1("CSRSS: ReplyPortHandle %lx CsrApiPort %lx\n", ReplyPort, CsrApiPort); } /* We failed big time, so start out fresh */ Reply = NULL; ReplyPort = CsrApiPort; DPRINT1("failed: %lx\n", Status); continue; } else { /* A bizare "success" code, just try again */ DPRINT1("NtReplyWaitReceivePort returned \"success\" status 0x%x\n", Status); continue; } } /* Use whatever Client ID we got */ Teb->RealClientId = Request->Header.ClientId; /* Get the Message Type */ MessageType = Request->Header.u2.s2.Type; /* Handle connection requests */ if (MessageType == LPC_CONNECTION_REQUEST) { /* Handle the Connection Request */ DPRINT("Accepting new connection\n"); CsrpHandleConnectionRequest((PPORT_MESSAGE)Request); Reply = NULL; ReplyPort = CsrApiPort; continue; } /* It's some other kind of request. Get the lock for the lookup */ CsrAcquireProcessLock(); /* Now do the lookup to get the CSR_THREAD */ CsrThread = CsrLocateThreadByClientId(&CsrProcess, &Request->Header.ClientId); /* Did we find a thread? */ if (!CsrThread) { /* This wasn't a CSR Thread, release lock */ CsrReleaseProcessLock(); /* If this was an exception, handle it */ if (MessageType == LPC_EXCEPTION) { DPRINT1("Exception from unknown thread, just continue\n"); Reply = Request; ReplyPort = CsrApiPort; Reply->Status = DBG_CONTINUE; } else if (MessageType == LPC_PORT_CLOSED || MessageType == LPC_CLIENT_DIED) { /* The Client or Port are gone, loop again */ DPRINT("Death from unknown thread, just continue\n"); Reply = NULL; ReplyPort = CsrApiPort; } else if (MessageType == LPC_ERROR_EVENT) { /* If it's a hard error, handle this too */ DPRINT1("Hard error from unknown thread, call handlers\n"); HandleHardError: HardErrorMsg = (PHARDERROR_MSG)Request; /* Default it to unhandled */ HardErrorMsg->Response = ResponseNotHandled; /* Check if there are free api threads */ CsrpCheckRequestThreads(); if (CsrpStaticThreadCount) { CsrHandleHardError(CsrThread, (PHARDERROR_MSG)Request); } /* If the response was 0xFFFFFFFF, we'll ignore it */ if (HardErrorMsg->Response == 0xFFFFFFFF) { Reply = NULL; ReplyPort = CsrApiPort; } else { if (CsrThread) CsrDereferenceThread(CsrThread); Reply = Request; ReplyPort = CsrApiPort; } } else if (MessageType == LPC_REQUEST) { /* This is an API Message coming from a non-CSR Thread */ DPRINT1("No thread found for request %lx and clientID %lx.%lx\n", Request->ApiNumber & 0xFFFF, Request->Header.ClientId.UniqueProcess, Request->Header.ClientId.UniqueThread); Reply = Request; ReplyPort = CsrApiPort; Reply->Status = STATUS_ILLEGAL_FUNCTION; } else if (MessageType == LPC_DATAGRAM) { DPRINT1("Kernel datagram: not yet supported\n"); Reply = NULL; ReplyPort = CsrApiPort; } else { /* Some other ignored message type */ Reply = NULL; ReplyPort = CsrApiPort; } /* Keep going */ continue; } /* We have a valid thread, was this an LPC Request? */ if (MessageType != LPC_REQUEST) { /* It's not an API, check if the client died */ if (MessageType == LPC_CLIENT_DIED) { /* Get the information and check if it matches our thread */ ClientDiedMsg = (PCLIENT_DIED_MSG)Request; if (ClientDiedMsg->CreateTime.QuadPart == CsrThread->CreateTime.QuadPart) { /* Reference the thread */ CsrLockedReferenceThread(CsrThread); /* Destroy the thread in the API Message */ CsrDestroyThread(&Request->Header.ClientId); /* Check if the thread was actually ourselves */ if (CsrProcess->ThreadCount == 1) { /* Kill the process manually here */ DPRINT1("Last thread\n"); CsrDestroyProcess(&CsrThread->ClientId, 0); } /* Remove our extra reference */ CsrLockedDereferenceThread(CsrThread); } /* Release the lock and keep looping */ CsrReleaseProcessLock(); Reply = NULL; ReplyPort = CsrApiPort; continue; } /* Reference the thread and release the lock */ CsrLockedReferenceThread(CsrThread); CsrReleaseProcessLock(); /* If this was an exception, handle it */ if (MessageType == LPC_EXCEPTION) { /* Kill the process */ DPRINT1("Exception in %lx.%lx. Killing...\n", Request->Header.ClientId.UniqueProcess, Request->Header.ClientId.UniqueThread); NtTerminateProcess(CsrProcess->ProcessHandle, STATUS_ABANDONED); /* Destroy it from CSR */ CsrDestroyProcess(&Request->Header.ClientId, STATUS_ABANDONED); /* Return a Debug Message */ DebugMessage = (PDBGKM_MSG)Request; DebugMessage->ReturnedStatus = DBG_CONTINUE; Reply = Request; ReplyPort = CsrApiPort; /* Remove our extra reference */ CsrDereferenceThread(CsrThread); } else if (MessageType == LPC_ERROR_EVENT) { DPRINT1("Hard error from known CSR thread... handling\n"); goto HandleHardError; } else { /* Something else */ DPRINT1("Unhandled message type: %lx\n", MessageType); CsrDereferenceThread(CsrThread); Reply = NULL; } /* Keep looping */ continue; } /* We got an API Request */ CsrLockedReferenceThread(CsrThread); CsrReleaseProcessLock(); /* Assume success */ Reply = Request; Request->Status = STATUS_SUCCESS; /* Now we reply to a particular client */ ReplyPort = CsrThread->Process->ClientPort; DPRINT("CSR: Got CSR API: %x [Message Origin: %x]\n", Request->ApiNumber, Request->Header.ClientId.UniqueThread); /* Validation complete, start SEH */ _SEH2_TRY { ULONG ReplyCode; /* Make sure we have enough threads */ CsrpCheckRequestThreads(); /* Set the client thread pointer */ NtCurrentTeb()->CsrClientThread = CsrThread; /* Call the Handler */ CsrApiCallHandler(Request, &ReplyCode); /* Increase the static thread count */ _InterlockedIncrement(&CsrpStaticThreadCount); /* Restore the server thread */ NtCurrentTeb()->CsrClientThread = ServerThread; /* Check if this is a dead client now */ if (Request->ApiNumber == 0xBABE) { /* Reply to the death message */ NtReplyPort(ReplyPort, &Reply->Header); /* Reply back to the API port now */ ReplyPort = CsrApiPort; Reply = NULL; /* Drop the reference */ CsrDereferenceThread(CsrThread); } else { /* Drop the reference */ CsrDereferenceThread(CsrThread); } } _SEH2_EXCEPT(CsrUnhandledExceptionFilter(_SEH2_GetExceptionInformation())) { Reply = NULL; ReplyPort = CsrApiPort; } _SEH2_END; } /* Close the port and exit the thread */ // NtClose(ServerPort); DPRINT1("CSR: %s done\n", __FUNCTION__); /* We're out of the loop for some reason, terminate! */ NtTerminateThread(NtCurrentThread(), Status); //return Status; } /*++ * @name CsrReleaseCapturedArguments * @implemented NT5.1 * * The CsrReleaseCapturedArguments routine releases a Capture Buffer * that was previously captured with CsrCaptureArguments. * * @param ApiMessage * Pointer to the CSR API Message containing the Capture Buffer * that needs to be released. * * @return None. * * @remarks None. * *--*/ VOID NTAPI CsrReleaseCapturedArguments(IN PCSR_API_MESSAGE ApiMessage) { PCSR_CAPTURE_BUFFER RemoteCaptureBuffer, LocalCaptureBuffer; SIZE_T BufferDistance; ULONG PointerCount; ULONG_PTR **PointerOffsets, *CurrentPointer; /* Get the capture buffers */ RemoteCaptureBuffer = ApiMessage->CsrCaptureData; LocalCaptureBuffer = RemoteCaptureBuffer->PreviousCaptureBuffer; /* Free the previous one */ RemoteCaptureBuffer->PreviousCaptureBuffer = NULL; /* Find out the difference between the two buffers */ BufferDistance = (ULONG_PTR)LocalCaptureBuffer - (ULONG_PTR)RemoteCaptureBuffer; /* Save the pointer count and offset pointer */ PointerCount = RemoteCaptureBuffer->PointerCount; PointerOffsets = (ULONG_PTR**)(RemoteCaptureBuffer + 1); /* Start the loop */ while (PointerCount) { /* Get the current pointer */ CurrentPointer = *PointerOffsets++; if (CurrentPointer) { /* Add it to the CSR Message structure */ CurrentPointer += (ULONG_PTR)ApiMessage; /* Modify the pointer to take into account its new position */ *CurrentPointer += BufferDistance; } /* Move to the next Pointer */ PointerCount--; } /* Copy the data back */ RtlMoveMemory(LocalCaptureBuffer, RemoteCaptureBuffer, RemoteCaptureBuffer->Size); /* Free our allocated buffer */ RtlFreeHeap(CsrHeap, 0, RemoteCaptureBuffer); } /* EOF */