SRVCTOS.C

/******************************************************************************\ 
*       This is a part of the Microsoft Source Code Samples.  
*       Copyright 1995 - 1997 Microsoft Corporation. 
*       All rights reserved.  
*       This source code is only intended as a supplement to  
*       Microsoft Development Tools and/or WinHelp documentation. 
*       See these sources for detailed information regarding the  
*       Microsoft samples programs. 
\******************************************************************************/ 
 
/*++ 
 
Copyright (c) 1997  Microsoft Corporation 
 
Module Name: 
 
    SrvCtoS.c 
 
Abstract: 
 
    This file implements the client-to-server flow 
    of data for remote server.  The data is the keyboard 
    or piped input that the client received and sent 
    over the wire to us, bracketed by BEGINMARK and ENDMARK 
    bytes so we can display nice attribution comments in 
    brackets next to input lines. 
 
Author: 
 
    Dave Hart  30 May 1997 
 
Environment: 
 
    Console App. User mode. 
 
Revision History: 
 
--*/ 
 
#include <windows.h> 
#include <stdio.h> 
#include <stdlib.h> 
#include <io.h> 
#include <string.h> 
#include "Remote.h" 
#include "Server.h" 
 
 
 
VOID 
FASTCALL 
StartReadClientInput( 
    PREMOTE_CLIENT pClient 
    ) 
{ 
    // 
    // Start read of data from this client's stdin. 
    // 
 
    if ( ! ReadFileEx( 
               pClient->PipeReadH, 
               pClient->ReadBuffer, 
               BUFFSIZE - 1,                  // allow for null term 
               &pClient->ReadOverlapped, 
               ReadClientInputCompleted 
               )) { 
 
        CloseClient(pClient); 
    } 
} 
 
 
VOID 
WINAPI 
ReadClientInputCompleted( 
    DWORD dwError, 
    DWORD cbRead, 
    LPOVERLAPPED lpO 
    ) 
{ 
    PREMOTE_CLIENT pClient; 
 
    pClient = CONTAINING_RECORD(lpO, REMOTE_CLIENT, ReadOverlapped); 
 
    if (HandleSessionError(pClient, dwError) || 
        !cbRead) { 
 
        return; 
    } 
 
    pClient->ReadBuffer[cbRead] = 0; 
 
    if (FilterCommand(pClient, pClient->ReadBuffer, cbRead)) { 
 
        // 
        // Local command, don't pass it to child app, just 
        // start another client read. 
        // 
 
        if ( ! ReadFileEx( 
                   pClient->PipeReadH, 
                   pClient->ReadBuffer, 
                   BUFFSIZE - 1,                  // allow for null term 
                   &pClient->ReadOverlapped, 
                   ReadClientInputCompleted 
                   )) { 
 
            CloseClient(pClient); 
        } 
 
    } else { 
 
        // 
        // Write buffer to child stdin. 
        // 
 
        if ( ! WriteFileEx( 
                   hWriteChildStdIn, 
                   pClient->ReadBuffer, 
                   cbRead, 
                   &pClient->ReadOverlapped, 
                   WriteChildStdInCompleted 
                   )) { 
 
            // Child is going away.  Let this client's chain of IO stop. 
        } 
    } 
} 
 
 
VOID 
WINAPI 
WriteChildStdInCompleted( 
    DWORD dwError, 
    DWORD cbWritten, 
    LPOVERLAPPED lpO 
    ) 
{ 
    PREMOTE_CLIENT pClient; 
 
    pClient = CONTAINING_RECORD(lpO, REMOTE_CLIENT, ReadOverlapped); 
 
    if (HandleSessionError(pClient, dwError)) { 
 
        return; 
    } 
 
    // 
    // Start another read against the client input. 
    // 
 
    StartReadClientInput(pClient); 
}