617 lines
15 KiB
C++
617 lines
15 KiB
C++
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/**********************************************************************/
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/** Microsoft Windows NT **/
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/** Copyright(c) Microsoft Corp., 1994 **/
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/**********************************************************************/
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/*
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conn.hxx
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This module contains the connection class
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FILE HISTORY:
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Johnl 15-Aug-1994 Created
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*/
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#ifndef _CONN_HXX_
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#define _CONN_HXX_
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# include "w3inst.hxx"
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# include "rdns.hxx"
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# include <reftrace.h>
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//
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// Determines if client connection reference count tracking is enabled
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//
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#if DBG && !defined(_WIN64)
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#define CC_REF_TRACKING 1
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#else
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#define CC_REF_TRACKING 0
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#endif
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//
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// The default timeout to wait for the completion of an Atq IO request (in sec)
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//
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#define W3_IO_TIMEOUT (5*60)
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//
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// The initial size of the buffer to receive the client request
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//
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#define W3_DEFAULT_BUFFSIZE 4096
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//
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// The end of a line is considered to be the linefeed character
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//
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#define W3_EOL 0x0A
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//
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// Valid signature of a CLIENT_CONN_STATE
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//
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#define CLIENT_CONN_SIGNATURE ((DWORD) ' SCC')
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//
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// Invalid signature of a CLIENT_CONN_STATE
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//
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#define CLIENT_CONN_SIGNATURE_FREE ((DWORD) 'xssc')
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//
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// The various states a CLIENT_CONN object can be in
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//
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enum CLIENT_CONN_STATE
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{
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//
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// We've just accepted the TCP connection from the client but we have
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// no other information.
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//
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CCS_STARTUP = 0,
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//
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// We are in the process of receiving the client's HTTP request buffer
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//
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CCS_GETTING_CLIENT_REQ,
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//
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// We are reading data from the client socket meant for a gateway
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//
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CCS_GATHERING_GATEWAY_DATA,
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//
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// We're executing the clients HTTP request
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//
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CCS_PROCESSING_CLIENT_REQ,
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//
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// The server or client has initiated a disconnect. We have to
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// wait till all outstanding IO requests are completed before
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// cleaning up
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//
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CCS_DISCONNECTING,
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//
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// All pending requests have been completed. Finish cleaning
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// up.
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//
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CCS_SHUTDOWN
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};
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//
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// parameter block used to initialize connections
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//
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typedef struct _CLIENT_CONN_PARAMS
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{
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SOCKET sClient;
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PSOCKADDR pAddrLocal;
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PSOCKADDR pAddrRemote;
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PATQ_CONTEXT pAtqContext;
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PVOID pEndpointObject;
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PIIS_ENDPOINT pEndpoint;
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PVOID pvInitialBuff;
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DWORD cbInitialBuff;
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} CLIENT_CONN_PARAMS, *PCLIENT_CONN_PARAMS;
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class CLIENT_CONN
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{
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public:
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BOOL IsValid( VOID )
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{ return _fIsValid; }
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//
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// This is the work entry point that is driven by the completion of the
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// async IO.
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//
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BOOL DoWork( DWORD BytesWritten,
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DWORD CompletionStatus,
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BOOL fIOCompletion);
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#if CC_REF_TRACKING
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//
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// ATQ notification trace
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//
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// Notification of ATQ completion, for debugging purpose only.
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//
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VOID NotifyAtqProcessContext( DWORD BytesWritten,
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DWORD CompletionStatus,
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DWORD dwSig );
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#endif
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//
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// Optionally sends a status response then initiates the disconnect
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//
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// HTResponse - HTTP status code
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// ErrorResponse - System error or resource ID of response
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//
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// If this function fails, then the connection will be aborted
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//
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dllexp
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VOID Disconnect( HTTP_REQ_BASE * pRequest = NULL,
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DWORD HTResponse = 0,
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DWORD ErrorResponse = NO_ERROR,
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BOOL fDoShutdown = TRUE,
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LPBOOL pfFinished =NULL );
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dllexp
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BOOL OnSessionStartup( BOOL *pfDoAgain,
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PVOID pvInitial = NULL,
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DWORD cbInitial = 0,
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BOOL fFirst = FALSE);
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//
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// Walks the connection list and calls disconnect on each connection
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//
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static VOID DisconnectAllUsers( PIIS_SERVER_INSTANCE Instance = NULL );
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//
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// Increments and decrements the reference count
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//
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UINT Reference( VOID );
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UINT Dereference( VOID );
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UINT QueryRefCount( VOID ) const
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{ return _cRef; }
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PIIS_ENDPOINT QueryW3Endpoint( VOID ) const
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{ return m_pW3Endpoint; }
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PW3_SERVER_INSTANCE QueryW3Instance( VOID ) const
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{ return m_pInstance; }
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BOOL IsW3Instance( VOID ) const
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{ return m_pInstance != NULL; }
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VOID SetW3Instance( IN PW3_SERVER_INSTANCE pInstance )
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{ DBG_ASSERT(m_pInstance == NULL); m_pInstance = pInstance; }
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W3_SERVER_STATISTICS * QueryW3StatsObj( VOID ) const
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{ return m_pW3Stats; }
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VOID SetW3StatsObj( IN LPW3_SERVER_STATISTICS pW3Stats )
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{ m_pW3Stats = pW3Stats; }
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DWORD QueryLocalIPAddress( VOID ) const
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{ return m_localIpAddress; }
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DWORD QueryRemoteIPAddress( VOID ) const
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{ return m_remoteIpAddress; }
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BOOL RequestAbortiveClose( VOID );
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BOOL CloseConnection( VOID );
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//
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// Simple wrappers to the corresponding Atq functions
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//
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BOOL ReadFile( LPVOID lpBuffer,
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DWORD nBytesToRead );
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BOOL WriteFile( LPVOID lpBuffer,
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DWORD nBytesToRead );
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BOOL SyncWsaSend( WSABUF * rgWsaBuffers,
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DWORD cWsaBuffers,
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LPDWORD pcbWritten );
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BOOL TransmitFile( HANDLE hFile,
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DWORD Offset,
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DWORD BytesToWrite,
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DWORD dwFlags,
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PVOID pHead = NULL,
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DWORD HeadLength = 0,
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PVOID pTail = NULL,
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DWORD TailLength = 0 );
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BOOL TransmitFileAndRecv( HANDLE hFile,
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DWORD Offset,
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DWORD BytesToWrite,
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DWORD dwFlags,
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PVOID pHead = NULL,
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DWORD HeadLength = 0,
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PVOID pTail = NULL,
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DWORD TailLength = 0,
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LPVOID lpBuffer = NULL,
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DWORD BytesToRead = 0);
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BOOL WriteFileAndRecv( LPVOID lpSendBuffer,
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DWORD BytesToWrite,
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LPVOID lpRecvBuffer = NULL,
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DWORD BytesToRead = 0);
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BOOL PostCompletionStatus( DWORD BytesTransferred );
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//
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// This list entry is put on the client connection list
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//
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LIST_ENTRY ListEntry;
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SOCKET QuerySocket( VOID ) const
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{ return _sClient; }
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PATQ_CONTEXT QueryAtqContext( VOID ) const
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{ return _AtqContext; }
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USHORT QueryPort( VOID ) const
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{ return _sPort; }
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USHORT QueryRemotePort( VOID ) const
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{ return _sRemotePort; }
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BOOL IsSecurePort( VOID ) const
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{ return _fSecurePort; }
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//
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// Make sure the next state is set before an async IO call is made
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//
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enum CLIENT_CONN_STATE QueryState( VOID ) const
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{ return _ccState; }
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VOID SetState( CLIENT_CONN_STATE ccState )
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{ _ccState = ccState; }
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BOOL CheckSignature( VOID ) const
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{ return _Signature == CLIENT_CONN_SIGNATURE; }
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TCHAR * QueryRemoteAddr( VOID ) const
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{ return (TCHAR *) _achRemoteAddr; }
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TCHAR * QueryLocalAddr( VOID ) const
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{ return (TCHAR *) _achLocalAddr; }
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VOID SetAtqReuseContextFlag( BOOL fReuseContext )
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{ _fReuseContext = fReuseContext; }
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static DWORD QueryFreeListSize( VOID )
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{ return _cFree; }
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static DWORD Initialize( VOID );
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static VOID Terminate( VOID );
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static CLIENT_CONN * Alloc( PCLIENT_CONN_PARAMS );
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dllexp static VOID Free( CLIENT_CONN * pConn );
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static VOID TrimFreeList( VOID );
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BOOL QueryDnsName(
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LPBOOL pfSync,
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ADDRCHECKFUNCEX pFunc,
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ADDRCHECKARG pArg,
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LPSTR * ppName
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)
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{
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return _acCheck.QueryDnsName( pfSync, pFunc, pArg, ppName );
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}
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AC_RESULT CheckIpAccess( LPBOOL pfNeedDns )
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{ return _acCheck.CheckIpAccess( pfNeedDns ); }
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AC_RESULT CheckDnsAccess()
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{ return _acCheck.CheckDnsAccess(); }
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BOOL BindAccessCheckList( LPBYTE p, DWORD dw )
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{ return _acCheck.BindCheckList( p, dw ); }
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VOID UnbindAccessCheckList()
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{ _acCheck.UnbindCheckList(); }
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LPSTR QueryResolvedDnsName()
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{ return _acCheck.QueryResolvedDnsName(); }
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BOOL IsDnsResolved()
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{ return _acCheck.IsDnsResolved(); }
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HTTP_REQ_BASE * QueryHttpReq( VOID) const
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{ return (_phttpReq); }
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protected:
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//
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// Constructor and destructor
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//
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CLIENT_CONN( PCLIENT_CONN_PARAMS );
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VOID Initialize( PCLIENT_CONN_PARAMS );
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~CLIENT_CONN( VOID );
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VOID Reset( VOID );
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BOOL IsCleaningUp( VOID ) const
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{ return QueryState() == CCS_DISCONNECTING ||
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QueryState() == CCS_SHUTDOWN;
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}
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private:
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//
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// Contains the CLIENT_CONN signature
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//
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ULONG _Signature;
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//
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// Construction success indicator
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//
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BOOL _fIsValid;
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//
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// Contains the client socket connection openned by the connection thread
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//
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SOCKET _sClient;
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enum CLIENT_CONN_STATE _ccState;
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//
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// Reference count. Can't go away until the count reaches 0
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//
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LONG _cRef;
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//
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// Contains an ASCII representation of the client's remote address
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// and the adapter local address
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//
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CHAR _achRemoteAddr[20];
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CHAR _achLocalAddr[20];
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//
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// Port this connection is on
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//
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USHORT _sPort;
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//
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// Remote port
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//
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USHORT _sRemotePort;
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//
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// This request came in through the secure port
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//
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BOOL _fSecurePort;
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//
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// Parses the data and determines the appropriate action
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//
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HTTP_REQ_BASE * _phttpReq;
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//
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// server instance. Both are referenced.
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//
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PW3_SERVER_INSTANCE m_pInstance;
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PIIS_ENDPOINT m_pW3Endpoint;
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//
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// server instance - statistics object.
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//
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LPW3_SERVER_STATISTICS m_pW3Stats;
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//
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// local ip address
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//
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DWORD m_localIpAddress;
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//
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// remote sockaddr
|
||
|
|
//
|
||
|
|
|
||
|
|
DWORD m_remoteIpAddress;
|
||
|
|
|
||
|
|
//
|
||
|
|
// context returned on a non-acceptex completion
|
||
|
|
//
|
||
|
|
|
||
|
|
PVOID m_atqEndpointObject;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Initial receive buffer if we're doing AcceptEx processing
|
||
|
|
//
|
||
|
|
|
||
|
|
PVOID _pvInitial;
|
||
|
|
DWORD _cbInitial;
|
||
|
|
|
||
|
|
PATQ_CONTEXT _AtqContext;
|
||
|
|
|
||
|
|
//
|
||
|
|
// If FALSE, the Atq Context should not be reused because the calling
|
||
|
|
// thread will be exiting soon
|
||
|
|
//
|
||
|
|
|
||
|
|
BOOL _fReuseContext:1;
|
||
|
|
|
||
|
|
BOOL _fAbortiveClose:1;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Response string for disconnect notifications.
|
||
|
|
//
|
||
|
|
// NOTE: If the server handles non-serial requests, then two request completing at
|
||
|
|
// the same time could use this string
|
||
|
|
//
|
||
|
|
|
||
|
|
STR _strResponse;
|
||
|
|
|
||
|
|
//
|
||
|
|
// These are for the lookaside buffer list
|
||
|
|
//
|
||
|
|
|
||
|
|
static CRITICAL_SECTION _csBuffList;
|
||
|
|
static LIST_ENTRY _BuffListHead;
|
||
|
|
static BOOL _fGlobalInit;
|
||
|
|
static DWORD _cFree;
|
||
|
|
static DWORD _FreeListScavengerCookie;
|
||
|
|
|
||
|
|
LIST_ENTRY _BuffListEntry;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Address check object for IP / DNS
|
||
|
|
//
|
||
|
|
|
||
|
|
ADDRESS_CHECK _acCheck;
|
||
|
|
|
||
|
|
#if CC_REF_TRACKING
|
||
|
|
public:
|
||
|
|
|
||
|
|
//
|
||
|
|
// For object local refcount tracing
|
||
|
|
//
|
||
|
|
|
||
|
|
PTRACE_LOG _pDbgCCRefTraceLog;
|
||
|
|
|
||
|
|
private:
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
//
|
||
|
|
// Functions for connection reference counts
|
||
|
|
//
|
||
|
|
|
||
|
|
inline VOID ReferenceConn( CLIENT_CONN * pConn )
|
||
|
|
{
|
||
|
|
pConn->Reference();
|
||
|
|
}
|
||
|
|
|
||
|
|
inline VOID DereferenceConn( CLIENT_CONN * pConn )
|
||
|
|
{
|
||
|
|
if ( !pConn->Dereference() ) {
|
||
|
|
|
||
|
|
CLIENT_CONN::Free( pConn );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************
|
||
|
|
|
||
|
|
Support for CLIENT_CONN debug ref trace logging
|
||
|
|
|
||
|
|
SYNOPSIS: Macro for writing to debug ref trace log.
|
||
|
|
|
||
|
|
HISTORY:
|
||
|
|
DaveK 10-Sep-1997 Created
|
||
|
|
|
||
|
|
********************************************************************/
|
||
|
|
|
||
|
|
//
|
||
|
|
// NOTE we avoid compile failure by hokey double typecast, below
|
||
|
|
// (since htrState is an enum, we must first cast it to int).
|
||
|
|
//
|
||
|
|
|
||
|
|
#define SHARED_LOG_REF_COUNT( \
|
||
|
|
cRefs \
|
||
|
|
, pClientConn \
|
||
|
|
, pHttpRequest \
|
||
|
|
, pWamRequest \
|
||
|
|
, htrState \
|
||
|
|
) \
|
||
|
|
\
|
||
|
|
if( g_pDbgCCRefTraceLog != NULL ) { \
|
||
|
|
\
|
||
|
|
ULONG_PTR i = (ULONG_PTR)htrState; \
|
||
|
|
PVOID pv = (PVOID) i; \
|
||
|
|
\
|
||
|
|
WriteRefTraceLogEx( \
|
||
|
|
g_pDbgCCRefTraceLog \
|
||
|
|
, cRefs \
|
||
|
|
, pClientConn \
|
||
|
|
, pHttpRequest \
|
||
|
|
, pWamRequest \
|
||
|
|
, pv \
|
||
|
|
); \
|
||
|
|
} \
|
||
|
|
|
||
|
|
//
|
||
|
|
// This macro logs the CLIENT_CONN specific ref trace log
|
||
|
|
//
|
||
|
|
|
||
|
|
#define LOCAL_LOG_REF_COUNT( \
|
||
|
|
cRefs \
|
||
|
|
, pClientConn \
|
||
|
|
, pHttpRequest \
|
||
|
|
, pWamRequest \
|
||
|
|
, htrState \
|
||
|
|
) \
|
||
|
|
\
|
||
|
|
if( _pDbgCCRefTraceLog != NULL ) { \
|
||
|
|
\
|
||
|
|
ULONG_PTR i = (ULONG_PTR)htrState; \
|
||
|
|
PVOID pv = (PVOID) i; \
|
||
|
|
\
|
||
|
|
WriteRefTraceLogEx( \
|
||
|
|
_pDbgCCRefTraceLog \
|
||
|
|
, cRefs \
|
||
|
|
, pClientConn \
|
||
|
|
, pHttpRequest \
|
||
|
|
, pWamRequest \
|
||
|
|
, pv \
|
||
|
|
); \
|
||
|
|
} \
|
||
|
|
|
||
|
|
#if CC_REF_TRACKING
|
||
|
|
inline
|
||
|
|
VOID
|
||
|
|
LogRefCountCCLocal(
|
||
|
|
IN LONG cRefs
|
||
|
|
, IN PVOID pClientConn
|
||
|
|
, IN PVOID pHttpRequest
|
||
|
|
, IN PVOID pWamRequest
|
||
|
|
, IN int htrState
|
||
|
|
)
|
||
|
|
{
|
||
|
|
if( pClientConn && ((CLIENT_CONN *)pClientConn)->_pDbgCCRefTraceLog )
|
||
|
|
{
|
||
|
|
WriteRefTraceLogEx(
|
||
|
|
((CLIENT_CONN *) pClientConn)->_pDbgCCRefTraceLog
|
||
|
|
, cRefs
|
||
|
|
, pClientConn
|
||
|
|
, pHttpRequest
|
||
|
|
, pWamRequest
|
||
|
|
, (PVOID) htrState
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if DBG
|
||
|
|
VOID DBG_CHECK_UnbalancedThreadToken(
|
||
|
|
IN const char * pszFilePath,
|
||
|
|
IN int nLineNum
|
||
|
|
);
|
||
|
|
#endif //DBG
|
||
|
|
|
||
|
|
#endif // !_CONN_HXX_
|