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Use of free SocketPro package for creating super client and server applications

, 23 Feb 2002
A set of socket libraries for writing distributed computing applications over the internet
socketpro.zip
netdemo
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DNSResolver.exe
GetHtml.exe
IONet.exe
MultipleSvs.exe
MultiSvs.exe
MultiSvsClient.exe
NetBaseR.dll
SafeSocket.exe
SecureSocket.exe
SpeedTest.exe
ClientSocket.dll
DResolver.dll
SBroker.dll
SockFile.dll
fundamental.gif
patterns.gif
NetBaseR.lib
DNSResolver
DNSResolver.vbp
DNSResolver.vbw
frmDNSResolver.frm
frmDNSResolver.frx
frmChatClient.frm
frmChatClient.frx
GETHTML.vbp
GETHTML.vbw
iIO.frm
IONet
IONet.vbp
IONet.vbw
frmMultiSvs.frm
frmMultiSvs.frx
MultiSvs.vbp
MultiSvs.vbw
SafeSocket.vbp
SafeSocket.vbw
SecureSocket.frm
SpeedTest.ico
SpeedTest.aps
SpeedTest.clw
SpeedTest.dsp
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dlldata.obj
DNS.rgs
DResolver.aps
DResolver.def
DResolver.dsp
DResolver.dsw
DResolver.opt
DResolver.plg
DResolver.tlb
DResolverps.def
DResolverps.exp
DResolverps.lib
DResolverps.mk
DResolver_i.obj
DResolver_p.obj
MultipleSvs.dsp
MultipleSvs.dsw
MultiSvs.dsp
MultiSvs.dsw
MultiSvs.rgs
MultiSvs.tlb
MultiSvsps.def
MultiSvsps.mk
dlldata.obj
SafeSocket.aps
SafeSocket.dsp
SafeSocket.dsw
SafeSocket.plg
SafeSocket.rgs
SafeSocket.tlb
SafeSocketps.def
SafeSocketps.dll
SafeSocketps.exp
SafeSocketps.lib
SafeSocketps.mk
SafeSocket_i.obj
SafeSocket_p.obj
SPassword.rgs
MultipleSvs.exe
MultiSvs.exe
NetBaseR.dll
SafeSocket.exe
// MultiSvs.cpp : Implementation of WinMain


// Note: Proxy/Stub Information
//      To build a separate proxy/stub DLL, 
//      run nmake -f MultiSvsps.mk in the project directory.

#include "stdafx.h"
#include "resource.h"
#include <initguid.h>
#include "MultiSvs.h"

#include "MultiSvs_i.c"

#include "MySocketSvr.h"

#include <stdio.h>

CServiceModule _Module;

BEGIN_OBJECT_MAP(ObjectMap)
END_OBJECT_MAP()


LPCTSTR FindOneOf(LPCTSTR p1, LPCTSTR p2)
{
    while (p1 != NULL && *p1 != NULL)
    {
        LPCTSTR p = p2;
        while (p != NULL && *p != NULL)
        {
            if (*p1 == *p)
                return CharNext(p1);
            p = CharNext(p);
        }
        p1 = CharNext(p1);
    }
    return NULL;
}

// Although some of these functions are big they are declared inline since they are only used once

inline HRESULT CServiceModule::RegisterServer(BOOL bRegTypeLib, BOOL bService)
{
    HRESULT hr = CoInitialize(NULL);
    if (FAILED(hr))
        return hr;

    // Remove any previous service since it may point to
    // the incorrect file
    Uninstall();

    // Add service entries
    UpdateRegistryFromResource(IDR_MultiSvs, TRUE);

    // Adjust the AppID for Local Server or Service
    CRegKey keyAppID;
    LONG lRes = keyAppID.Open(HKEY_CLASSES_ROOT, _T("AppID"), KEY_WRITE);
    if (lRes != ERROR_SUCCESS)
        return lRes;

    CRegKey key;
    lRes = key.Open(keyAppID, _T("{135302E2-F488-11D5-8B44-002078B038BB}"), KEY_WRITE);
    if (lRes != ERROR_SUCCESS)
        return lRes;
    key.DeleteValue(_T("LocalService"));
    
    if (bService)
    {
        key.SetValue(_T("MultiSvs"), _T("LocalService"));
        key.SetValue(_T("-Service"), _T("ServiceParameters"));
        // Create service
        Install();
    }

    // Add object entries
    hr = CComModule::RegisterServer(bRegTypeLib);

    CoUninitialize();
    return hr;
}

inline HRESULT CServiceModule::UnregisterServer()
{
    HRESULT hr = CoInitialize(NULL);
    if (FAILED(hr))
        return hr;

    // Remove service entries
    UpdateRegistryFromResource(IDR_MultiSvs, FALSE);
    // Remove service
    Uninstall();
    // Remove object entries
    CComModule::UnregisterServer(TRUE);
    CoUninitialize();
    return S_OK;
}

inline void CServiceModule::Init(_ATL_OBJMAP_ENTRY* p, HINSTANCE h, UINT nServiceNameID, const GUID* plibid)
{
    CComModule::Init(p, h, plibid);

    m_bService = TRUE;

    LoadString(h, nServiceNameID, m_szServiceName, sizeof(m_szServiceName) / sizeof(TCHAR));

    // set up the initial service status 
    m_hServiceStatus = NULL;
    m_status.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
    m_status.dwCurrentState = SERVICE_STOPPED;
    m_status.dwControlsAccepted = SERVICE_ACCEPT_STOP|SERVICE_ACCEPT_SHUTDOWN;
    m_status.dwWin32ExitCode = 0;
    m_status.dwServiceSpecificExitCode = 0;
    m_status.dwCheckPoint = 0;
    m_status.dwWaitHint = 0;
}

LONG CServiceModule::Unlock()
{
    LONG l = CComModule::Unlock();
    if (l == 0 && !m_bService)
        PostThreadMessage(dwThreadID, WM_QUIT, 0, 0);
    return l;
}

BOOL CServiceModule::IsInstalled()
{
    BOOL bResult = FALSE;

    SC_HANDLE hSCM = ::OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);

    if (hSCM != NULL)
    {
        SC_HANDLE hService = ::OpenService(hSCM, m_szServiceName, SERVICE_QUERY_CONFIG);
        if (hService != NULL)
        {
            bResult = TRUE;
            ::CloseServiceHandle(hService);
        }
        ::CloseServiceHandle(hSCM);
    }
    return bResult;
}

inline BOOL CServiceModule::Install()
{
    if (IsInstalled())
        return TRUE;

    SC_HANDLE hSCM = ::OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
    if (hSCM == NULL)
    {
        MessageBox(NULL, _T("Couldn't open service manager"), m_szServiceName, MB_OK);
        return FALSE;
    }

    // Get the executable file path
    TCHAR szFilePath[_MAX_PATH];
    ::GetModuleFileName(NULL, szFilePath, _MAX_PATH);

    SC_HANDLE hService = ::CreateService(
        hSCM, m_szServiceName, m_szServiceName,
        SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS|SERVICE_INTERACTIVE_PROCESS,
        SERVICE_AUTO_START/*SERVICE_DEMAND_START*/, SERVICE_ERROR_NORMAL,
        szFilePath, NULL, NULL, _T("RPCSS\0"), NULL, NULL);

    if (hService == NULL)
    {
        ::CloseServiceHandle(hSCM);
        MessageBox(NULL, _T("Couldn't create service"), m_szServiceName, MB_OK);
        return FALSE;
    }

    ::CloseServiceHandle(hService);
    ::CloseServiceHandle(hSCM);
    return TRUE;
}

inline BOOL CServiceModule::Uninstall()
{
    if (!IsInstalled())
        return TRUE;

    SC_HANDLE hSCM = ::OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);

    if (hSCM == NULL)
    {
        MessageBox(NULL, _T("Couldn't open service manager"), m_szServiceName, MB_OK);
        return FALSE;
    }

    SC_HANDLE hService = ::OpenService(hSCM, m_szServiceName, SERVICE_STOP | DELETE);

    if (hService == NULL)
    {
        ::CloseServiceHandle(hSCM);
        MessageBox(NULL, _T("Couldn't open service"), m_szServiceName, MB_OK);
        return FALSE;
    }
    SERVICE_STATUS status;
    ::ControlService(hService, SERVICE_CONTROL_STOP, &status);

    BOOL bDelete = ::DeleteService(hService);
    ::CloseServiceHandle(hService);
    ::CloseServiceHandle(hSCM);

    if (bDelete)
        return TRUE;
	ATLTRACE( "error code = %d\n", ::GetLastError());
    MessageBox(NULL, _T("Service could not be deleted"), m_szServiceName, MB_OK);
    return FALSE;
}

///////////////////////////////////////////////////////////////////////////////////////
// Logging functions
void CServiceModule::LogEvent(LPCTSTR pFormat, ...)
{
    TCHAR    chMsg[256];
    HANDLE  hEventSource;
    LPTSTR  lpszStrings[1];
    va_list pArg;

    va_start(pArg, pFormat);
    _vstprintf(chMsg, pFormat, pArg);
    va_end(pArg);

    lpszStrings[0] = chMsg;

    if (m_bService)
    {
        /* Get a handle to use with ReportEvent(). */
        hEventSource = RegisterEventSource(NULL, m_szServiceName);
        if (hEventSource != NULL)
        {
            /* Write to event log. */
            ReportEvent(hEventSource, EVENTLOG_INFORMATION_TYPE, 0, 0, NULL, 1, 0, (LPCTSTR*) &lpszStrings[0], NULL);
            DeregisterEventSource(hEventSource);
        }
    }
    else
    {
        // As we are not running as a service, just write the error to the console.
        _putts(chMsg);
    }
}

//////////////////////////////////////////////////////////////////////////////////////////////
// Service startup and registration
inline void CServiceModule::Start()
{
    SERVICE_TABLE_ENTRY st[] =
    {
        { m_szServiceName, _ServiceMain },
        { NULL, NULL }
    };
    if (m_bService && !::StartServiceCtrlDispatcher(st))
    {
		ATLTRACE( "error code = %d\n", ::GetLastError());
        m_bService = FALSE;
    }
    if (m_bService == FALSE)
        Run();
}

inline void CServiceModule::ServiceMain(DWORD /* dwArgc */, LPTSTR* /* lpszArgv */)
{
    // Register the control request handler
    m_status.dwCurrentState = SERVICE_START_PENDING;
    m_hServiceStatus = RegisterServiceCtrlHandler(m_szServiceName, _Handler);
    if (m_hServiceStatus == NULL)
    {
        LogEvent(_T("Handler not installed"));
        return;
    }
    SetServiceStatus(SERVICE_START_PENDING);

    m_status.dwWin32ExitCode = S_OK;
    m_status.dwCheckPoint = 0;
    m_status.dwWaitHint = 0;

    // When the Run function returns, the service has stopped.
    Run();

    SetServiceStatus(SERVICE_STOPPED);
    LogEvent(_T("Service stopped"));
}

inline void CServiceModule::Handler(DWORD dwOpcode)
{
    switch (dwOpcode)
    {
    case SERVICE_CONTROL_STOP:
        SetServiceStatus(SERVICE_STOP_PENDING);
        PostThreadMessage(dwThreadID, WM_QUIT, 0, 0);
        break;
    case SERVICE_CONTROL_PAUSE:
        break;
    case SERVICE_CONTROL_CONTINUE:
        break;
    case SERVICE_CONTROL_INTERROGATE:
        break;
    case SERVICE_CONTROL_SHUTDOWN:
		SetServiceStatus(SERVICE_STOP_PENDING);
        while(!::PostThreadMessage(dwThreadID, WM_QUIT, 0, 0))
		{
			::Sleep(1);
		}
        break;
    default:
        LogEvent(_T("Bad service request"));
    }
}

void WINAPI CServiceModule::_ServiceMain(DWORD dwArgc, LPTSTR* lpszArgv)
{
    _Module.ServiceMain(dwArgc, lpszArgv);
}
void WINAPI CServiceModule::_Handler(DWORD dwOpcode)
{
    _Module.Handler(dwOpcode); 
}

void CServiceModule::SetServiceStatus(DWORD dwState)
{
    m_status.dwCurrentState = dwState;
    ::SetServiceStatus(m_hServiceStatus, &m_status);
}

void CServiceModule::Run()
{
    _Module.dwThreadID = GetCurrentThreadId();

    HRESULT hr = CoInitialize(NULL);
//  If you are running on NT 4.0 or higher you can use the following call
//  instead to make the EXE free threaded.
//  This means that calls come in on a random RPC thread
//  HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);

    _ASSERTE(SUCCEEDED(hr));

    // This provides a NULL DACL which will allow access to everyone.
    CSecurityDescriptor sd;
    sd.InitializeFromThreadToken();
    hr = CoInitializeSecurity(sd, -1, NULL, NULL,
        RPC_C_AUTHN_LEVEL_PKT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL);
    _ASSERTE(SUCCEEDED(hr));

    hr = _Module.RegisterClassObjects(CLSCTX_LOCAL_SERVER | CLSCTX_REMOTE_SERVER, REGCLS_MULTIPLEUSE);
    _ASSERTE(SUCCEEDED(hr));

    LogEvent(_T("Service started"));
    if (m_bService)
        SetServiceStatus(SERVICE_RUNNING);
	MSG msg;
	InitSocket();
	do
	{
		::PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE);
		CMySocketSvr	MySocketSvr;
		MySocketSvr.SetInstance(_Module.m_hInst);
		
		//Create a socket at the server side on a port
		if(!MySocketSvr.Create(m_nPort))
			break;
		
		//Enable the server socket to listen and be ready for the client connections
		if(!MySocketSvr.Listen(64))
			break;
		
		//Start main message pump
		while (GetMessage(&msg, 0, 0, 0))
		{
			DispatchMessage(&msg);
		}
		MySocketSvr.Close();
	}while(false);

	//call this function after all of CAsySocket derived objects are destroyed
	UninitSocket();
    _Module.RevokeClassObjects();

    CoUninitialize();
}

/////////////////////////////////////////////////////////////////////////////
//
extern "C" int WINAPI _tWinMain(HINSTANCE hInstance, 
    HINSTANCE /*hPrevInstance*/, LPTSTR lpCmdLine, int /*nShowCmd*/)
{
    lpCmdLine = GetCommandLine(); //this line necessary for _ATL_MIN_CRT
    _Module.Init(ObjectMap, hInstance, IDS_SERVICENAME, &LIBID_MULTISVSLib);
    _Module.m_bService = TRUE;
	
	_Module.m_nPort=1739;

    TCHAR szTokens[] = _T("-/");

    LPCTSTR lpszToken = FindOneOf(lpCmdLine, szTokens);
    while (lpszToken != NULL)
    {
        if (lstrcmpi(lpszToken, _T("UnregServer"))==0)
            return _Module.UnregisterServer();

        // Register as Local Server
        if (lstrcmpi(lpszToken, _T("RegServer"))==0)
            return _Module.RegisterServer(TRUE, FALSE);
        
        // Register as Service
        if (lstrcmpi(lpszToken, _T("Service"))==0)
			return _Module.RegisterServer(TRUE, TRUE);
	
        lpszToken = FindOneOf(lpszToken, szTokens);
    }

    // Are we Service or Local Server
    CRegKey keyAppID;
    LONG lRes = keyAppID.Open(HKEY_CLASSES_ROOT, _T("AppID"), KEY_READ);
    if (lRes != ERROR_SUCCESS)
        return lRes;

    CRegKey key;
    lRes = key.Open(keyAppID, _T("{135302E2-F488-11D5-8B44-002078B038BB}"), KEY_READ);
    if (lRes != ERROR_SUCCESS)
        return lRes;

    TCHAR szValue[_MAX_PATH];
    DWORD dwLen = _MAX_PATH;
    lRes = key.QueryValue(szValue, _T("LocalService"), &dwLen);

    _Module.m_bService = FALSE;
    if (lRes == ERROR_SUCCESS)
        _Module.m_bService = TRUE;

    _Module.Start();

    // When we get here, the service has been stopped
    return _Module.m_status.dwWin32ExitCode;
}

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About the Author

Yuancai (Charlie) Ye
Web Developer
United States United States
Yuancai (Charlie) Ye, an experienced software engineer, lives in Atlanta, Georgia. He is an expert at OLEDB consumer and created a powerful data accessing libarary at the site http://www.udaparts.com. He has been working at SocketPro written from batching, asynchrony and parallel computation for more than three years. Visual C++, C# and ASP.NET are his favorite development environments.

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