mirror of
https://github.com/reactos/reactos.git
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570 lines
16 KiB
C
570 lines
16 KiB
C
/*
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* PROJECT: ReactOS Session Manager
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* LICENSE: GPL v2 or later - See COPYING in the top level directory
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* FILE: base/system/smss/client.c
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* PURPOSE: Client management.
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* PROGRAMMERS: ReactOS Development Team
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*/
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/* INCLUDES ******************************************************************/
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#include "smss.h"
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#include <sm/helper.h>
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#define NDEBUG
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#include <debug.h>
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/* Private ADT */
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#define SM_MAX_CLIENT_COUNT 16
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#define SM_INVALID_CLIENT_INDEX -1
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struct _SM_CLIENT_DIRECTORY
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{
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RTL_CRITICAL_SECTION Lock;
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ULONG Count;
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PSM_CLIENT_DATA Client [SM_MAX_CLIENT_COUNT];
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PSM_CLIENT_DATA CandidateClient;
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} SmpClientDirectory;
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/**********************************************************************
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* SmInitializeClientManagement/0
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*/
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NTSTATUS
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SmInitializeClientManagement (VOID)
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{
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DPRINT("SM: %s called\n", __FUNCTION__);
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RtlInitializeCriticalSection(& SmpClientDirectory.Lock);
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SmpClientDirectory.Count = 0;
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RtlZeroMemory (SmpClientDirectory.Client, sizeof SmpClientDirectory.Client);
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SmpClientDirectory.CandidateClient = NULL;
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return STATUS_SUCCESS;
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}
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/**********************************************************************
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* SmpSetClientInitialized/1
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*/
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VOID FASTCALL
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SmpSetClientInitialized (PSM_CLIENT_DATA Client)
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{
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DPRINT("SM: %s(%p) called\n", __FUNCTION__, Client);
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Client->Flags |= SM_CLIENT_FLAG_INITIALIZED;
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}
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/**********************************************************************
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* SmpGetFirstFreeClientEntry/0 PRIVATE
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*
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* NOTE: call it holding SmpClientDirectory.Lock only
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*/
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static INT NTAPI SmpGetFirstFreeClientEntry (VOID)
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{
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INT ClientIndex = 0;
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DPRINT("SM: %s called\n", __FUNCTION__);
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if (SmpClientDirectory.Count < SM_MAX_CLIENT_COUNT)
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{
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for (ClientIndex = 0;
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(ClientIndex < SM_MAX_CLIENT_COUNT);
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ClientIndex ++)
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{
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if (NULL == SmpClientDirectory.Client[ClientIndex])
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{
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DPRINT("SM: %s => %d\n", __FUNCTION__, ClientIndex);
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return ClientIndex; // found
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}
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}
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}
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return SM_INVALID_CLIENT_INDEX; // full!
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}
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/**********************************************************************
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* SmpLookupClient/1 PRIVATE
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*
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* DESCRIPTION
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* Lookup the subsystem server descriptor (client data) given its
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* base image ID.
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*
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* ARGUMENTS
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* SubsystemId: IMAGE_SUBSYSTEM_xxx
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*
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* RETURN VALUES
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* SM_INVALID_CLIENT_INDEX on error;
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* otherwise an index in the range (0..SM_MAX_CLIENT_COUNT).
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*
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* WARNING
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* SmpClientDirectory.Lock must be held by the caller.
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*/
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static INT FASTCALL
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SmpLookupClient (USHORT SubsystemId)
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{
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INT ClientIndex = 0;
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DPRINT("SM: %s(%d) called\n", __FUNCTION__, SubsystemId);
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if (0 != SmpClientDirectory.Count)
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{
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for (ClientIndex = 0; (ClientIndex < SM_MAX_CLIENT_COUNT); ClientIndex ++)
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{
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if (NULL != SmpClientDirectory.Client[ClientIndex])
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{
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if (SubsystemId == SmpClientDirectory.Client[ClientIndex]->SubsystemId)
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{
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return ClientIndex;
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}
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}
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}
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}
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return SM_INVALID_CLIENT_INDEX;
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}
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/**********************************************************************
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* SmpDestroyClientObject/2 PRIVATE
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*
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* WARNING
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* SmpClientDirectory.Lock must be held by the caller.
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*/
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static NTSTATUS NTAPI
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SmpDestroyClientObject (PSM_CLIENT_DATA Client, NTSTATUS DestroyReason)
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{
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DPRINT("SM:%s(%p,%08lx) called\n", __FUNCTION__, Client, DestroyReason);
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/* TODO: send shutdown to the SB port */
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NtTerminateProcess (Client->ServerProcess, DestroyReason);
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RtlFreeHeap (SmpHeap, 0, Client);
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-- SmpClientDirectory.Count;
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return STATUS_SUCCESS;
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}
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/**********************************************************************
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* SmBeginClientInitialization/1
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*
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* DESCRIPTION
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* Check if the candidate client matches the begin session
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* message from the subsystem process.
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*
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* ARGUMENTS
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* Request: message received by \SmApiPort
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* ClientData:
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*
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* RETURN VALUES
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* NTSTATUS
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*/
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NTSTATUS NTAPI
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SmBeginClientInitialization (IN PSM_PORT_MESSAGE Request,
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OUT PSM_CLIENT_DATA * ClientData)
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{
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NTSTATUS Status = STATUS_SUCCESS;
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PSM_CONNECT_DATA ConnectData = SmpGetConnectData (Request);
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ULONG SbApiPortNameSize = SM_CONNECT_DATA_SIZE(*Request);
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INT ClientIndex = SM_INVALID_CLIENT_INDEX;
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HANDLE Process;
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DPRINT("SM: %s(%p,%p) called\n", __FUNCTION__,
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Request, ClientData);
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RtlEnterCriticalSection (& SmpClientDirectory.Lock);
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/*
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* Is there a subsystem bootstrap in progress?
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*/
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if (NULL != SmpClientDirectory.CandidateClient)
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{
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PROCESS_BASIC_INFORMATION pbi;
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OBJECT_ATTRIBUTES ObjectAttributes;
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RtlZeroMemory (& pbi, sizeof pbi);
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InitializeObjectAttributes(&ObjectAttributes, NULL, 0, NULL, NULL);
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Status = NtOpenProcess(&Process,
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PROCESS_ALL_ACCESS,
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&ObjectAttributes,
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&Request->Header.ClientId);
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ASSERT(NT_SUCCESS(Status));
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Status = NtQueryInformationProcess (Process,
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ProcessBasicInformation,
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& pbi,
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sizeof pbi,
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NULL);
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ASSERT(NT_SUCCESS(Status));
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{
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SmpClientDirectory.CandidateClient->ServerProcessId =
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(ULONG) pbi.UniqueProcessId;
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}
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}
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else
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{
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DPRINT1("SM: %s: subsys booting with no descriptor!\n", __FUNCTION__);
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Status = STATUS_NOT_FOUND;
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RtlLeaveCriticalSection (& SmpClientDirectory.Lock);
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return Status;
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}
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/*
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* Check if a client for the ID already exist.
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*/
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if (SM_INVALID_CLIENT_INDEX != SmpLookupClient(ConnectData->SubSystemId))
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{
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DPRINT("SM: %s: attempt to register again subsystem %d.\n",
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__FUNCTION__,
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ConnectData->SubSystemId);
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// TODO something else to do here?
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RtlLeaveCriticalSection (& SmpClientDirectory.Lock);
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return STATUS_UNSUCCESSFUL;
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}
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/*
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* Check if a free entry exists in SmpClientDirectory.Client[].
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*/
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ClientIndex = SmpGetFirstFreeClientEntry();
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if (SM_INVALID_CLIENT_INDEX == ClientIndex)
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{
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DPRINT("SM: %s: SM_INVALID_CLIENT_INDEX == ClientIndex ", __FUNCTION__);
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SmpDestroyClientObject (SmpClientDirectory.CandidateClient, STATUS_NO_MEMORY);
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SmpClientDirectory.CandidateClient = NULL;
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return STATUS_NO_MEMORY;
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}
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/* OK! */
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DPRINT("SM: %s: registering subsystem ID=%d \n",
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__FUNCTION__, ConnectData->SubSystemId);
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/*
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* Initialize the client data
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*/
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SmpClientDirectory.CandidateClient->SubsystemId = ConnectData->SubSystemId;
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/* SM && DBG auto-initializes; other subsystems are required to call
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* SM_API_COMPLETE_SESSION via SMDLL. */
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if ((IMAGE_SUBSYSTEM_NATIVE == SmpClientDirectory.CandidateClient->SubsystemId) ||
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((USHORT)-1 == SmpClientDirectory.CandidateClient->SubsystemId))
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{
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SmpSetClientInitialized (SmpClientDirectory.CandidateClient);
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}
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if (SbApiPortNameSize > 0)
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{
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/* Only external servers have an SB port */
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RtlCopyMemory (SmpClientDirectory.CandidateClient->SbApiPortName,
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ConnectData->SbName,
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SbApiPortNameSize);
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}
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/*
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* Insert the new descriptor in the
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* client directory.
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*/
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SmpClientDirectory.Client [ClientIndex] = SmpClientDirectory.CandidateClient;
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/*
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* Increment the number of active subsystems.
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*/
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++ SmpClientDirectory.Count;
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/*
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* Notify to the caller the reference to the client data.
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*/
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if (ClientData)
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{
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*ClientData = SmpClientDirectory.CandidateClient;
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}
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/*
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* Free the slot for the candidate subsystem.
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*/
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SmpClientDirectory.CandidateClient = NULL;
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/* Done */
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RtlLeaveCriticalSection (& SmpClientDirectory.Lock);
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return STATUS_SUCCESS;
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}
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/**********************************************************************
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* SmCompleteClientInitialization/1
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*
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* DESCRIPTION
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* Lookup the subsystem server descriptor given the process ID
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* of the subsystem server process.
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*/
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NTSTATUS NTAPI
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SmCompleteClientInitialization (ULONG ProcessId)
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{
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NTSTATUS Status = STATUS_NOT_FOUND;
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INT ClientIndex = SM_INVALID_CLIENT_INDEX;
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DPRINT("SM: %s(%lu) called\n", __FUNCTION__, ProcessId);
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RtlEnterCriticalSection (& SmpClientDirectory.Lock);
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if (SmpClientDirectory.Count > 0)
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{
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for (ClientIndex = 0; ClientIndex < SM_MAX_CLIENT_COUNT; ClientIndex ++)
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{
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if ((NULL != SmpClientDirectory.Client [ClientIndex]) &&
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(ProcessId == SmpClientDirectory.Client [ClientIndex]->ServerProcessId))
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{
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SmpSetClientInitialized (SmpClientDirectory.Client [ClientIndex]);
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Status = STATUS_SUCCESS;
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break;
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}
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}
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}
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RtlLeaveCriticalSection (& SmpClientDirectory.Lock);
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return Status;
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}
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/**********************************************************************
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* SmpDestroyClientByClientIndex/1 PRIVATE
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*/
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static NTSTATUS NTAPI
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SmpDestroyClientByClientIndex (INT ClientIndex)
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{
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NTSTATUS Status = STATUS_SUCCESS;
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PSM_CLIENT_DATA Client = NULL;
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DPRINT("SM: %s(%d) called\n", __FUNCTION__, ClientIndex);
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if (SM_INVALID_CLIENT_INDEX == ClientIndex)
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{
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DPRINT1("SM: %s: SM_INVALID_CLIENT_INDEX == ClientIndex!\n",
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__FUNCTION__);
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Status = STATUS_NOT_FOUND;
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}
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else
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{
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Client = SmpClientDirectory.Client [ClientIndex];
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SmpClientDirectory.Client [ClientIndex] = NULL;
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if (NULL != Client)
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{
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Status = SmpDestroyClientObject (Client, STATUS_SUCCESS);
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} else {
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DPRINT("SM:%s: NULL == Client[%d]!\n", __FUNCTION__,
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ClientIndex);
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Status = STATUS_UNSUCCESSFUL;
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}
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}
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return Status;
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}
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/**********************************************************************
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* SmpTimeoutCandidateClient/1
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*
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* DESCRIPTION
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* Give the candidate client time to bootstrap and complete
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* session initialization. If the client fails in any way,
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* drop the pending client and kill the process.
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*
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* ARGUMENTS
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* x: HANDLE for the candidate process.
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*
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* RETURN VALUE
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* NONE.
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*/
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static VOID NTAPI SmpTimeoutCandidateClient (PVOID x)
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{
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NTSTATUS Status = STATUS_SUCCESS;
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HANDLE CandidateClientProcessHandle = (HANDLE) x;
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LARGE_INTEGER TimeOut;
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DPRINT("SM: %s(%p) called\n", __FUNCTION__, x);
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TimeOut.QuadPart = (LONGLONG) -300000000L; // 30s
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Status = NtWaitForSingleObject (CandidateClientProcessHandle,
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FALSE,
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& TimeOut);
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if (STATUS_TIMEOUT == Status)
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{
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RtlEnterCriticalSection (& SmpClientDirectory.Lock);
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if (NULL != SmpClientDirectory.CandidateClient)
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{
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DPRINT("SM:%s: destroy candidate %p\n", __FUNCTION__,
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SmpClientDirectory.CandidateClient);
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Status = SmpDestroyClientObject (SmpClientDirectory.CandidateClient,
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STATUS_TIMEOUT);
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SmpClientDirectory.CandidateClient = NULL;
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}
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RtlLeaveCriticalSection (& SmpClientDirectory.Lock);
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}
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NtTerminateThread (NtCurrentThread(), Status);
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}
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/**********************************************************************
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* SmpCreateClient/1
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*
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* DESCRIPTION
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* Create a "candidate" client. Client descriptor will enter the
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* client directory only at the end of the registration
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* procedure. Otherwise, we will kill the associated process.
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*
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* ARGUMENTS
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* ProcessHandle: handle of the subsystem server process.
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*
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* RETURN VALUE
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* NTSTATUS:
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* STATUS_SUCCESS if all OK;
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* STATUS_DEVICE_BUSY if another SS is still booting;
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* STATUS_NO_MEMORY if client descriptor allocation failed;
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*
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*
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*/
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NTSTATUS NTAPI
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SmCreateClient (PRTL_USER_PROCESS_INFORMATION ProcessInfo, PWSTR ProgramName)
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{
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NTSTATUS Status = STATUS_SUCCESS;
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DPRINT("SM: %s(%p, %S) called\n", __FUNCTION__, ProcessInfo->ProcessHandle, ProgramName);
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RtlEnterCriticalSection (& SmpClientDirectory.Lock);
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/*
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* Check if the candidate client slot is empty.
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*/
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if (NULL == SmpClientDirectory.CandidateClient)
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{
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/*
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* Check if there exist a free entry in the
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* SmpClientDirectory.Client array.
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*/
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if (SM_INVALID_CLIENT_INDEX == SmpGetFirstFreeClientEntry())
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{
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DPRINT("SM: %s(%p): out of memory!\n",
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__FUNCTION__, ProcessInfo->ProcessHandle);
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Status = STATUS_NO_MEMORY;
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}
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/*
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* Allocate the storage for client data
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*/
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SmpClientDirectory.CandidateClient =
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RtlAllocateHeap (SmpHeap,
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HEAP_ZERO_MEMORY,
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sizeof (SM_CLIENT_DATA));
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if (NULL == SmpClientDirectory.CandidateClient)
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{
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DPRINT("SM: %s(%p): out of memory!\n",
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__FUNCTION__, ProcessInfo->ProcessHandle);
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Status = STATUS_NO_MEMORY;
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}
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else
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{
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DPRINT("SM:%s(%p,%S): candidate is %p\n", __FUNCTION__,
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ProcessInfo, ProgramName, SmpClientDirectory.CandidateClient);
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/* Initialize the candidate client. */
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RtlInitializeCriticalSection(& SmpClientDirectory.CandidateClient->Lock);
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SmpClientDirectory.CandidateClient->ServerProcess =
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(HANDLE) ProcessInfo->ProcessHandle;
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SmpClientDirectory.CandidateClient->ServerProcessId =
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(DWORD_PTR) ProcessInfo->ClientId.UniqueProcess;
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/*
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* Copy the program name
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*/
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RtlCopyMemory (SmpClientDirectory.CandidateClient->ProgramName,
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ProgramName,
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SM_SB_NAME_MAX_LENGTH);
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}
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} else {
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DPRINT1("SM: %s: CandidateClient %p pending!\n", __FUNCTION__,
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SmpClientDirectory.CandidateClient);
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Status = STATUS_DEVICE_BUSY;
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}
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RtlLeaveCriticalSection (& SmpClientDirectory.Lock);
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/* Create the timeout thread for external subsystems */
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if (_wcsicmp (ProgramName, L"Session Manager") && _wcsicmp (ProgramName, L"Debug"))
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{
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Status = RtlCreateUserThread (NtCurrentProcess(),
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NULL,
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FALSE,
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0,
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0,
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0,
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(PTHREAD_START_ROUTINE) SmpTimeoutCandidateClient,
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SmpClientDirectory.CandidateClient->ServerProcess,
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NULL,
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NULL);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("SM:%s: RtlCreateUserThread() failed (Status=%08lx)\n",
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__FUNCTION__, Status);
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}
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}
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return Status;
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}
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/**********************************************************************
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* SmpDestroyClient/1
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*
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* 1. close any handle
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* 2. kill client process
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* 3. release resources
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*/
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NTSTATUS NTAPI
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SmDestroyClient (ULONG SubsystemId)
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{
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NTSTATUS Status = STATUS_SUCCESS;
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INT ClientIndex = SM_INVALID_CLIENT_INDEX;
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DPRINT("SM: %s(%lu) called\n", __FUNCTION__, SubsystemId);
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RtlEnterCriticalSection (& SmpClientDirectory.Lock);
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ClientIndex = SmpLookupClient (SubsystemId);
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if (SM_INVALID_CLIENT_INDEX == ClientIndex)
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{
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DPRINT1("SM: %s: del req for non existent subsystem (id=%d)\n",
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__FUNCTION__, SubsystemId);
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return STATUS_NOT_FOUND;
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}
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Status = SmpDestroyClientByClientIndex (ClientIndex);
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RtlLeaveCriticalSection (& SmpClientDirectory.Lock);
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return Status;
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}
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/* === Utilities for SmQryInfo === */
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/**********************************************************************
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* SmGetClientBasicInformation/1
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*/
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NTSTATUS FASTCALL
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SmGetClientBasicInformation (PSM_BASIC_INFORMATION i)
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{
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INT ClientIndex = 0;
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INT Index = 0;
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DPRINT("SM: %s(%p) called\n", __FUNCTION__, i);
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RtlEnterCriticalSection (& SmpClientDirectory.Lock);
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i->SubSystemCount = SmpClientDirectory.Count;
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i->Unused = 0;
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if (SmpClientDirectory.Count > 0)
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{
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for (ClientIndex = 0; (ClientIndex < SM_MAX_CLIENT_COUNT); ClientIndex ++)
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{
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if ((NULL != SmpClientDirectory.Client [ClientIndex]) &&
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(Index < SM_QRYINFO_MAX_SS_COUNT))
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{
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i->SubSystem[Index].Id = SmpClientDirectory.Client [ClientIndex]->SubsystemId;
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i->SubSystem[Index].Flags = SmpClientDirectory.Client [ClientIndex]->Flags;
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i->SubSystem[Index].ProcessId = SmpClientDirectory.Client [ClientIndex]->ServerProcessId;
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++ Index;
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}
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}
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}
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RtlLeaveCriticalSection (& SmpClientDirectory.Lock);
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return STATUS_SUCCESS;
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}
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/**********************************************************************
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* SmGetSubSystemInformation/1
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*/
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NTSTATUS FASTCALL
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SmGetSubSystemInformation (PSM_SUBSYSTEM_INFORMATION i)
|
|
{
|
|
NTSTATUS Status = STATUS_SUCCESS;
|
|
INT ClientIndex = SM_INVALID_CLIENT_INDEX;
|
|
|
|
DPRINT("SM: %s(%p) called\n", __FUNCTION__, i);
|
|
|
|
RtlEnterCriticalSection (& SmpClientDirectory.Lock);
|
|
ClientIndex = SmpLookupClient (i->SubSystemId);
|
|
if (SM_INVALID_CLIENT_INDEX == ClientIndex)
|
|
{
|
|
Status = STATUS_NOT_FOUND;
|
|
}
|
|
else
|
|
{
|
|
i->Flags = SmpClientDirectory.Client [ClientIndex]->Flags;
|
|
i->ProcessId = SmpClientDirectory.Client [ClientIndex]->ServerProcessId;
|
|
RtlCopyMemory (i->NameSpaceRootNode,
|
|
SmpClientDirectory.Client [ClientIndex]->SbApiPortName,
|
|
(SM_QRYINFO_MAX_ROOT_NODE * sizeof(i->NameSpaceRootNode[0])));
|
|
}
|
|
RtlLeaveCriticalSection (& SmpClientDirectory.Lock);
|
|
return Status;
|
|
}
|
|
|
|
/* EOF */
|