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AsyncSocketEx.cpp
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AsyncSocketEx.cpp
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/*CAsyncSocketEx by Tim Kosse (Tim.Kosse@gmx.de)
Version 1.2 (2003-03-28)
--------------------------------------------------------
Introduction:
-------------
CAsyncSocketEx is a replacement for the MFC class CAsyncSocket.
This class was written because CAsyncSocket is not the fastest WinSock
wrapper and it's very hard to add new functionality to CAsyncSocket
derived classes. This class offers the same functionality as CAsyncSocket.
Also, CAsyncSocketEx offers some enhancements which were not possible with
CAsyncSocket without some tricks.
How do I use it?
----------------
Basically exactly like CAsyncSocket.
To use CAsyncSocketEx, just replace all occurrences of CAsyncSocket in your
code with CAsyncSocketEx, if you did not enhance CAsyncSocket yourself in
any way, you won't have to change anything else in your code.
Why is CAsyncSocketEx faster?
-----------------------------
CAsyncSocketEx is slightly faster when dispatching notification event messages.
First have a look at the way CAsyncSocket works. For each thread that uses
CAsyncSocket, a window is created. CAsyncSocket calls WSAAsyncSelect with
the handle of that window. Until here, CAsyncSocketEx works the same way.
But CAsyncSocket uses only one window message (WM_SOCKET_NOTIFY) for all
sockets within one thread. When the window receive WM_SOCKET_NOTIFY, wParam
contains the socket handle and the window looks up an CAsyncSocket instance
using a map. CAsyncSocketEx works differently. It's helper window uses a
wide range of different window messages (WM_USER through 0xBFFF) and passes
a different message to WSAAsyncSelect for each socket. When a message in
the specified range is received, CAsyncSocketEx looks up the pointer to a
CAsyncSocketEx instance in an Array using the index of message - WM_USER.
As you can see, CAsyncSocketEx uses the helper window in a more efficient
way, as it don't have to use the slow maps to lookup it's own instance.
Still, speed increase is not very much, but it may be noticeable when using
a lot of sockets at the same time.
Please note that the changes do not affect the raw data throughput rate,
CAsyncSocketEx only dispatches the notification messages faster.
What else does CAsyncSocketEx offer?
------------------------------------
CAsyncSocketEx offers a flexible layer system. One example is the proxy layer.
Just create an instance of the proxy layer, configure it and add it to the layer
chain of your CAsyncSocketEx instance. After that, you can connect through
proxies.
Benefit: You don't have to change much to use the layer system.
Another layer that is currently in development is the SSL layer to establish
SSL encrypted connections.
License
-------
Feel free to use this class, as long as you don't claim that you wrote it
and this copyright notice stays intact in the source files.
If you use this class in commercial applications, please send a short message
to tim.kosse@gmx.de
*/
#include "stdafx.h"
#include "DebugHelpers.h"
#include "AsyncSocketEx.h"
#ifndef NOLAYERS
#include "AsyncSocketExLayer.h"
#endif //NOLAYERS
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#ifndef CCRITICALSECTIONWRAPPERINCLUDED
class CCriticalSectionWrapper
{
public:
CCriticalSectionWrapper()
{
InitializeCriticalSection(&m_criticalSection);
}
~CCriticalSectionWrapper()
{
DeleteCriticalSection(&m_criticalSection);
}
void Lock()
{
EnterCriticalSection(&m_criticalSection);
}
void Unlock()
{
LeaveCriticalSection(&m_criticalSection);
}
protected:
CRITICAL_SECTION m_criticalSection;
};
#define CCRITICALSECTIONWRAPPERINCLUDED
#endif
CCriticalSectionWrapper CAsyncSocketEx::m_sGlobalCriticalSection;
CAsyncSocketEx::t_AsyncSocketExThreadDataList *CAsyncSocketEx::m_spAsyncSocketExThreadDataList = 0;
#ifndef _AFX
#ifndef VERIFY
#define VERIFY(x) (void(x))
#endif //VERIFY
#ifndef ASSERT
#define ASSERT(x)
#endif //ASSERT
#endif //_AFX
/////////////////////////////
//Helper Window class
class CAsyncSocketExHelperWindow
{
public:
CAsyncSocketExHelperWindow()
{
//Initialize data
m_pAsyncSocketExWindowData = new t_AsyncSocketExWindowData[512]; //Reserve space for 512 active sockets
memset(m_pAsyncSocketExWindowData, 0, 512*sizeof(t_AsyncSocketExWindowData));
m_nWindowDataSize = 512;
m_nSocketCount = 0;
m_nWindowDataPos = 0;
//Create window
WNDCLASSEX wndclass;
wndclass.cbSize = sizeof wndclass;
wndclass.style = 0;
wndclass.lpfnWndProc = WindowProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = GetModuleHandle(0);
wndclass.hIcon = 0;
wndclass.hCursor = 0;
wndclass.hbrBackground = 0;
wndclass.lpszMenuName = 0;
wndclass.lpszClassName = _T("CAsyncSocketEx Helper Window");
wndclass.hIconSm = 0;
RegisterClassEx(&wndclass);
m_hWnd = CreateWindow(_T("CAsyncSocketEx Helper Window"), _T("CAsyncSocketEx Helper Window"), 0, 0, 0, 0, 0, 0, 0, 0, GetModuleHandle(0));
ASSERT( m_hWnd );
SetWindowLong(m_hWnd, GWL_USERDATA, (LONG)this);
};
virtual ~CAsyncSocketExHelperWindow()
{
//Clean up socket storage
delete[] m_pAsyncSocketExWindowData;
m_pAsyncSocketExWindowData = 0;
m_nWindowDataSize = 0;
m_nSocketCount = 0;
//Destroy window
if (m_hWnd)
{
DestroyWindow(m_hWnd);
m_hWnd = 0;
}
}
//Adds a socket to the list of attached sockets
BOOL AddSocket(CAsyncSocketEx *pSocket, int &nSocketIndex)
{
ASSERT( pSocket );
if (!m_nWindowDataSize)
{
ASSERT( !m_nSocketCount );
m_nWindowDataSize = 512;
m_pAsyncSocketExWindowData = new t_AsyncSocketExWindowData[512]; //Reserve space for 512 active sockets
memset(m_pAsyncSocketExWindowData, 0, 512 * sizeof(t_AsyncSocketExWindowData));
}
if (nSocketIndex != -1)
{
ASSERT( m_pAsyncSocketExWindowData );
ASSERT( m_nWindowDataSize>nSocketIndex );
ASSERT( m_pAsyncSocketExWindowData[nSocketIndex].m_pSocket == pSocket );
ASSERT( m_nSocketCount );
return TRUE;
}
//Increase socket storage if too small
if (m_nSocketCount >= m_nWindowDataSize - 10)
{
int nOldWindowDataSize = m_nWindowDataSize;
ASSERT( m_nWindowDataSize < MAX_SOCKETS );
m_nWindowDataSize += 512;
if (m_nWindowDataSize > MAX_SOCKETS)
m_nWindowDataSize = MAX_SOCKETS;
t_AsyncSocketExWindowData* tmp = m_pAsyncSocketExWindowData;
m_pAsyncSocketExWindowData = new t_AsyncSocketExWindowData[m_nWindowDataSize];
memcpy(m_pAsyncSocketExWindowData, tmp, nOldWindowDataSize * sizeof(t_AsyncSocketExWindowData));
memset(m_pAsyncSocketExWindowData + nOldWindowDataSize, 0, (m_nWindowDataSize - nOldWindowDataSize) * sizeof(t_AsyncSocketExWindowData));
delete[] tmp;
}
//Search for free slot
for (int i = m_nWindowDataPos; i < m_nWindowDataSize + m_nWindowDataPos; i++)
{
if (m_pAsyncSocketExWindowData[i % m_nWindowDataSize].m_pSocket == NULL)
{
m_pAsyncSocketExWindowData[i % m_nWindowDataSize].m_pSocket = pSocket;
nSocketIndex = i % m_nWindowDataSize;
m_nWindowDataPos = (i + 1) % m_nWindowDataSize;
m_nSocketCount++;
return TRUE;
}
}
//No slot found, maybe there are too much sockets!
return FALSE;
}
//Removes a socket from the socket storage
BOOL RemoveSocket(CAsyncSocketEx *pSocket, int &nSocketIndex)
{
UNREFERENCED_PARAMETER(pSocket);
ASSERT( pSocket );
if (nSocketIndex == -1)
return TRUE;
ASSERT( m_pAsyncSocketExWindowData );
ASSERT( m_nWindowDataSize > 0 );
ASSERT( m_nSocketCount > 0 );
ASSERT( m_pAsyncSocketExWindowData[nSocketIndex].m_pSocket == pSocket );
m_pAsyncSocketExWindowData[nSocketIndex].m_pSocket = 0;
nSocketIndex = -1;
m_nSocketCount--;
return TRUE;
}
//Processes event notifications sent by the sockets or the layers
static LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
#if !NO_USE_CLIENT_TCP_CATCH_ALL_HANDLER
try
{
#endif//!NO_USE_CLIENT_TCP_CATCH_ALL_HANDLER
if (message >= WM_SOCKETEX_NOTIFY)
{
//Verify parameters
ASSERT( hWnd );
CAsyncSocketExHelperWindow *pWnd = (CAsyncSocketExHelperWindow *)GetWindowLong(hWnd, GWL_USERDATA);
ASSERT( pWnd );
if (message < (UINT)(WM_SOCKETEX_NOTIFY + pWnd->m_nWindowDataSize)) //Index is within socket storage
{
//Lookup socket and verify if it's valid
CAsyncSocketEx *pSocket = pWnd->m_pAsyncSocketExWindowData[message - WM_SOCKETEX_NOTIFY].m_pSocket;
SOCKET hSocket = wParam;
if (!pSocket)
return 0;
if (hSocket == INVALID_SOCKET)
return 0;
if (pSocket->m_SocketData.hSocket != hSocket)
return 0;
int nEvent = lParam & 0xFFFF;
int nErrorCode = lParam >> 16;
//Dispatch notification
#ifndef NOLAYERS
if (!pSocket->m_pFirstLayer)
{
#endif //NOLAYERS
//Dispatch to CAsyncSocketEx instance
switch (nEvent)
{
case FD_READ:
{
DWORD nBytes;
if (!pSocket->IOCtl(FIONREAD, &nBytes))
nErrorCode = WSAGetLastError();
if (nBytes != 0 || nErrorCode != 0)
pSocket->OnReceive(nErrorCode);
break;
}
case FD_FORCEREAD: //Forceread does not check if there's data waiting
pSocket->OnReceive(nErrorCode);
break;
case FD_WRITE:
pSocket->OnSend(nErrorCode);
break;
case FD_CONNECT:
pSocket->OnConnect(nErrorCode);
break;
case FD_ACCEPT:
pSocket->OnAccept(nErrorCode);
break;
case FD_CLOSE:
pSocket->OnClose(nErrorCode);
break;
}
}
#ifndef NOLAYERS
else //Dispatch notification to the lowest layer
{
if (nEvent == FD_READ)
{
DWORD nBytes;
if (!pSocket->IOCtl(FIONREAD, &nBytes))
nErrorCode = WSAGetLastError();
if (nBytes != 0 || nErrorCode != 0)
pSocket->m_pLastLayer->CallEvent(nEvent, nErrorCode);
}
else
pSocket->m_pLastLayer->CallEvent(nEvent, nErrorCode);
}
}
#endif //NOLAYERS
return 0;
}
#ifndef NOLAYERS
else if (message == WM_SOCKETEX_TRIGGER) //Notification event sent by a layer
{
//Verify parameters, lookup socket and notification message
if (!wParam)
return 0;
CAsyncSocketEx *pSocket = (CAsyncSocketEx *)wParam;
CAsyncSocketExLayer::t_LayerNotifyMsg *pMsg = (CAsyncSocketExLayer::t_LayerNotifyMsg *)lParam;
if (pSocket->m_SocketData.hSocket == INVALID_SOCKET) {
delete pMsg;
return 0;
}
int nEvent = pMsg->lEvent & 0xFFFF;
int nErrorCode = pMsg->lEvent >> 16;
//Dispatch to layer
if (pMsg->pLayer)
pMsg->pLayer->CallEvent(nEvent, nErrorCode);
else
{
//Dispatch to socket class
switch (nEvent)
{
case FD_READ:
if (pSocket->m_lEvent & FD_READ)
pSocket->OnReceive(nErrorCode);
break;
case FD_FORCEREAD:
if (pSocket->m_lEvent & FD_FORCEREAD)
pSocket->OnReceive(nErrorCode);
break;
case FD_WRITE:
if (pSocket->m_lEvent & FD_WRITE)
pSocket->OnSend(nErrorCode);
break;
case FD_CONNECT:
if (pSocket->m_lEvent & FD_CONNECT)
pSocket->OnConnect(nErrorCode);
break;
case FD_ACCEPT:
if (pSocket->m_lEvent & FD_ACCEPT)
pSocket->OnAccept(nErrorCode);
break;
case FD_CLOSE:
if (pSocket->m_lEvent & FD_CLOSE)
pSocket->OnClose(nErrorCode);
break;
}
}
delete pMsg;
return 0;
}
#endif //NOLAYERS
else if (message == WM_SOCKETEX_GETHOST)
{
//WSAAsyncGetHostByName reply
//Verify parameters
ASSERT( hWnd );
CAsyncSocketExHelperWindow *pWnd = (CAsyncSocketExHelperWindow *)GetWindowLong(hWnd, GWL_USERDATA);
ASSERT( pWnd );
CAsyncSocketEx *pSocket = NULL;
int i;
for (i = 0; i < pWnd->m_nWindowDataSize; i++)
{
pSocket = pWnd->m_pAsyncSocketExWindowData[i].m_pSocket;
if (pSocket && pSocket->m_hAsyncGetHostByNameHandle &&
pSocket->m_hAsyncGetHostByNameHandle == (HANDLE)wParam)
break;
}
if (i == pWnd->m_nWindowDataSize)
return 0;
int nErrorCode = lParam >> 16;
if (nErrorCode) {
pSocket->OnConnect(nErrorCode);
// Do *NOT* access 'pSocket', it may already have been deleted (CServerConnect)
//delete[] pSocket->m_pAsyncGetHostByNameBuffer;
//pSocket->m_pAsyncGetHostByNameBuffer = 0;
//pSocket->m_hAsyncGetHostByNameHandle = 0;
return 0;
}
SOCKADDR_IN sockAddr = {0};
sockAddr.sin_family = AF_INET;
sockAddr.sin_addr.s_addr = ((LPIN_ADDR)((LPHOSTENT)pSocket->m_pAsyncGetHostByNameBuffer)->h_addr)->s_addr;
sockAddr.sin_port = htons((u_short)pSocket->m_nAsyncGetHostByNamePort);
if (!pSocket->OnHostNameResolved(&sockAddr)) {
// Do *NOT* access 'pSocket', it may already have been deleted (CServerConnect)
//delete[] pSocket->m_pAsyncGetHostByNameBuffer;
//pSocket->m_pAsyncGetHostByNameBuffer = 0;
//pSocket->m_hAsyncGetHostByNameHandle = 0;
return 0;
}
BOOL res = pSocket->Connect((SOCKADDR*)&sockAddr, sizeof(sockAddr));
delete[] pSocket->m_pAsyncGetHostByNameBuffer;
pSocket->m_pAsyncGetHostByNameBuffer = 0;
pSocket->m_hAsyncGetHostByNameHandle = 0;
if (!res && GetLastError() != WSAEWOULDBLOCK)
pSocket->OnConnect(GetLastError());
return 0;
}
return DefWindowProc(hWnd, message, wParam, lParam);
#if !NO_USE_CLIENT_TCP_CATCH_ALL_HANDLER
}
catch(CException* e){
TCHAR szError[1024];
e->GetErrorMessage(szError, ARRSIZE(szError));
const CRuntimeClass* pRuntimeClass = e->GetRuntimeClass();
LPCSTR pszClassName = (pRuntimeClass) ? pRuntimeClass->m_lpszClassName : NULL;
if (!pszClassName)
pszClassName = "CException";
TRACE(_T("*** Unknown %hs exception in CAsyncSocketExHelperWindow::WindowProc - %s\n"), pszClassName, szError);
e->Delete();
}
catch (...) {
// TODO: This exception handler should definitively *not* be here. Though we seem to need it to
// catch some very strange crashs which deal with socket deletion problems in the client's TCP socket.
TRACE("*** Unknown exception in CAsyncSocketExHelperWindow::WindowProc\n");
ASSERT(0);
}
return 0;
#endif//!NO_USE_CLIENT_TCP_CATCH_ALL_HANDLER
}
HWND CAsyncSocketExHelperWindow::GetHwnd()
{
return m_hWnd;
}
private:
HWND m_hWnd;
struct t_AsyncSocketExWindowData
{
CAsyncSocketEx *m_pSocket;
} *m_pAsyncSocketExWindowData;
int m_nWindowDataSize;
int m_nWindowDataPos;
int m_nSocketCount;
};
//////////////////////////////////////////////////////////////////////
// Konstruktion/Destruktion
//////////////////////////////////////////////////////////////////////
IMPLEMENT_DYNAMIC(CAsyncSocketEx, CObject)
CAsyncSocketEx::CAsyncSocketEx()
{
m_SocketData.hSocket = INVALID_SOCKET;
m_SocketData.nSocketIndex = -1;
m_pLocalAsyncSocketExThreadData = 0;
#ifndef NOLAYERS
m_pFirstLayer = 0;
m_pLastLayer = 0;
#endif //NOLAYERS
m_pAsyncGetHostByNameBuffer = NULL;
m_hAsyncGetHostByNameHandle = NULL;
}
CAsyncSocketEx::~CAsyncSocketEx()
{
Close();
FreeAsyncSocketExInstance();
}
BOOL CAsyncSocketEx::Create(UINT nSocketPort /*=0*/, int nSocketType /*=SOCK_STREAM*/,
long lEvent /*=FD_READ | FD_WRITE | FD_OOB | FD_ACCEPT | FD_CONNECT | FD_CLOSE*/,
LPCSTR lpszSocketAddress /*=NULL*/, BOOL bReuseAddr /*=FALSE*/ )
{
//Close the socket, although this should not happen
if (GetSocketHandle() != INVALID_SOCKET) {
ASSERT(0);
WSASetLastError(WSAEALREADY);
return FALSE;
}
if (!InitAsyncSocketExInstance()) {
ASSERT(0);
WSASetLastError(WSANOTINITIALISED);
return FALSE;
}
#ifndef NOLAYERS
if (m_pFirstLayer)
return m_pFirstLayer->Create(nSocketPort, nSocketType, lEvent, lpszSocketAddress);
else
#endif //NOLAYERS
{
SOCKET hSocket = socket(AF_INET, nSocketType, 0);
if (hSocket == INVALID_SOCKET)
return FALSE;
m_SocketData.hSocket = hSocket;
AttachHandle(hSocket);
if (!AsyncSelect(lEvent)) {
Close();
return FALSE;
}
#ifndef NOLAYERS
if (m_pFirstLayer)
{
if (WSAAsyncSelect(m_SocketData.hSocket, GetHelperWindowHandle(), m_SocketData.nSocketIndex + WM_SOCKETEX_NOTIFY, FD_READ | FD_WRITE | FD_OOB | FD_ACCEPT | FD_CONNECT | FD_CLOSE)) {
Close();
return FALSE;
}
}
#endif //NOLAYERS
if (bReuseAddr)
{
// Has to be done right before binding the socket!
int iOptVal = 1;
VERIFY( SetSockOpt(SO_REUSEADDR, &iOptVal, sizeof iOptVal) );
}
if (!Bind(nSocketPort, lpszSocketAddress)) {
Close();
return FALSE;
}
}
return TRUE;
}
void CAsyncSocketEx::OnReceive(int /*nErrorCode*/)
{
}
void CAsyncSocketEx::OnSend(int /*nErrorCode*/)
{
}
void CAsyncSocketEx::OnConnect(int /*nErrorCode*/)
{
}
void CAsyncSocketEx::OnAccept(int /*nErrorCode*/)
{
}
void CAsyncSocketEx::OnClose(int /*nErrorCode*/)
{
}
BOOL CAsyncSocketEx::OnHostNameResolved(const SOCKADDR_IN * /*pSockAddr*/)
{
return TRUE;
}
BOOL CAsyncSocketEx::Bind(UINT nSocketPort, LPCSTR lpszSocketAddress)
{
SOCKADDR_IN sockAddr = {0};
if (lpszSocketAddress == NULL)
sockAddr.sin_addr.s_addr = htonl(INADDR_ANY);
else
{
sockAddr.sin_addr.s_addr = inet_addr(lpszSocketAddress);
if (sockAddr.sin_addr.s_addr == INADDR_NONE) {
WSASetLastError(WSAEINVAL);
return FALSE;
}
}
sockAddr.sin_family = AF_INET;
sockAddr.sin_port = htons((u_short)nSocketPort);
return Bind((SOCKADDR*)&sockAddr, sizeof(sockAddr));
}
BOOL CAsyncSocketEx::Bind(const SOCKADDR* lpSockAddr, int nSockAddrLen)
{
if (!bind(m_SocketData.hSocket, lpSockAddr, nSockAddrLen))
return TRUE;
else
return FALSE;
}
void CAsyncSocketEx::AttachHandle(SOCKET /*hSocket*/)
{
ASSERT( m_pLocalAsyncSocketExThreadData );
VERIFY( m_pLocalAsyncSocketExThreadData->m_pHelperWindow->AddSocket(this, m_SocketData.nSocketIndex) );
}
void CAsyncSocketEx::DetachHandle(SOCKET /*hSocket*/)
{
ASSERT( m_pLocalAsyncSocketExThreadData );
if (!m_pLocalAsyncSocketExThreadData)
return;
ASSERT( m_pLocalAsyncSocketExThreadData->m_pHelperWindow );
if (!m_pLocalAsyncSocketExThreadData->m_pHelperWindow)
return;
VERIFY( m_pLocalAsyncSocketExThreadData->m_pHelperWindow->RemoveSocket(this, m_SocketData.nSocketIndex) );
}
void CAsyncSocketEx::Close()
{
#ifndef NOLAYERS
if (m_pFirstLayer)
m_pFirstLayer->Close();
#endif //NOLAYERS
if (m_SocketData.hSocket != INVALID_SOCKET)
{
VERIFY( closesocket(m_SocketData.hSocket) != SOCKET_ERROR );
DetachHandle(m_SocketData.hSocket);
m_SocketData.hSocket = INVALID_SOCKET;
}
#ifndef NOLAYERS
RemoveAllLayers();
#endif //NOLAYERS
delete[] m_pAsyncGetHostByNameBuffer;
m_pAsyncGetHostByNameBuffer = NULL;
if (m_hAsyncGetHostByNameHandle) {
WSACancelAsyncRequest(m_hAsyncGetHostByNameHandle);
m_hAsyncGetHostByNameHandle = NULL;
}
}
BOOL CAsyncSocketEx::InitAsyncSocketExInstance()
{
//Check if already initialized
if (m_pLocalAsyncSocketExThreadData)
return TRUE;
DWORD id = GetCurrentThreadId();
BOOL bResult = TRUE;
m_sGlobalCriticalSection.Lock();
try{
//Get thread specific data
if (m_spAsyncSocketExThreadDataList)
{
t_AsyncSocketExThreadDataList *pList = m_spAsyncSocketExThreadDataList;
while (pList)
{
ASSERT( pList->pThreadData );
ASSERT( pList->pThreadData->nInstanceCount > 0 );
if (pList->pThreadData->nThreadId == id)
{
m_pLocalAsyncSocketExThreadData = pList->pThreadData;
m_pLocalAsyncSocketExThreadData->nInstanceCount++;
break;
}
pList = pList->pNext;
}
//Current thread yet has no sockets
if (!pList)
{
//Initialize data for current thread
pList = new t_AsyncSocketExThreadDataList;
pList->pNext = m_spAsyncSocketExThreadDataList;
m_spAsyncSocketExThreadDataList = pList;
m_pLocalAsyncSocketExThreadData = new t_AsyncSocketExThreadData;
m_pLocalAsyncSocketExThreadData->nInstanceCount = 1;
m_pLocalAsyncSocketExThreadData->nThreadId = id;
m_pLocalAsyncSocketExThreadData->m_pHelperWindow = new CAsyncSocketExHelperWindow;
m_spAsyncSocketExThreadDataList->pThreadData = m_pLocalAsyncSocketExThreadData;
}
}
else
{ //No thread has instances of CAsyncSocketEx; Initialize data
m_spAsyncSocketExThreadDataList = new t_AsyncSocketExThreadDataList;
m_spAsyncSocketExThreadDataList->pNext = 0;
m_pLocalAsyncSocketExThreadData = new t_AsyncSocketExThreadData;
m_pLocalAsyncSocketExThreadData->nInstanceCount = 1;
m_pLocalAsyncSocketExThreadData->nThreadId = id;
m_pLocalAsyncSocketExThreadData->m_pHelperWindow = new CAsyncSocketExHelperWindow;
m_spAsyncSocketExThreadDataList->pThreadData = m_pLocalAsyncSocketExThreadData;
}
}
catch(...){
TRACE("Unknown exception in CAsyncSocketEx::InitAsyncSocketExInstance()\n");
ASSERT(0);
bResult = FALSE;
}
m_sGlobalCriticalSection.Unlock();
return bResult;
}
void CAsyncSocketEx::FreeAsyncSocketExInstance()
{
//Check if already freed
if (!m_pLocalAsyncSocketExThreadData)
return;
DWORD id = m_pLocalAsyncSocketExThreadData->nThreadId;
m_sGlobalCriticalSection.Lock();
try{
ASSERT( m_spAsyncSocketExThreadDataList );
t_AsyncSocketExThreadDataList *pList = m_spAsyncSocketExThreadDataList;
t_AsyncSocketExThreadDataList *pPrev = 0;
//Search for data for current thread and decrease instance count
while (pList)
{
ASSERT( pList->pThreadData );
ASSERT( pList->pThreadData->nInstanceCount > 0 );
if (pList->pThreadData->nThreadId == id)
{
ASSERT( m_pLocalAsyncSocketExThreadData == pList->pThreadData );
m_pLocalAsyncSocketExThreadData->nInstanceCount--;
//Freeing last instance?
//If so, destroy helper window
if (!m_pLocalAsyncSocketExThreadData->nInstanceCount)
{
delete m_pLocalAsyncSocketExThreadData->m_pHelperWindow;
delete m_pLocalAsyncSocketExThreadData;
if (pPrev)
pPrev->pNext = pList->pNext;
else
m_spAsyncSocketExThreadDataList = pList->pNext;
delete pList;
break;
}
break;
}
pPrev = pList;
pList = pList->pNext;
ASSERT( pList );
}
}
catch(...){
TRACE("Unknown exception in CAsyncSocketEx::FreeAsyncSocketExInstance()\n");
ASSERT(0);
}
m_sGlobalCriticalSection.Unlock();
}
int CAsyncSocketEx::Receive(void* lpBuf, int nBufLen, int nFlags /*=0*/)
{
#ifndef NOLAYERS
if (m_pFirstLayer)
return m_pFirstLayer->Receive(lpBuf, nBufLen, nFlags);
else
#endif //NOLAYERS
return recv(m_SocketData.hSocket, (LPSTR)lpBuf, nBufLen, nFlags);
}
int CAsyncSocketEx::Send(const void* lpBuf, int nBufLen, int nFlags /*=0*/)
{
#ifndef NOLAYERS
if (m_pFirstLayer)
return m_pFirstLayer->Send(lpBuf, nBufLen, nFlags);
else
#endif //NOLAYERS
return send(m_SocketData.hSocket, (LPSTR)lpBuf, nBufLen, nFlags);
}
BOOL CAsyncSocketEx::Connect(LPCSTR lpszHostAddress, UINT nHostPort)
{
ASSERT( lpszHostAddress != NULL );
#ifndef NOLAYERS
if (m_pFirstLayer)
return m_pFirstLayer->Connect(lpszHostAddress, nHostPort);
else
#endif //NOLAYERS
{
SOCKADDR_IN sockAddr = {0};
sockAddr.sin_addr.s_addr = inet_addr(lpszHostAddress);
if (sockAddr.sin_addr.s_addr == INADDR_NONE)
{
m_pAsyncGetHostByNameBuffer = new char[MAXGETHOSTSTRUCT];
m_nAsyncGetHostByNamePort = nHostPort;
m_hAsyncGetHostByNameHandle = WSAAsyncGetHostByName(GetHelperWindowHandle(), WM_SOCKETEX_GETHOST, lpszHostAddress, m_pAsyncGetHostByNameBuffer, MAXGETHOSTSTRUCT);
if (!m_hAsyncGetHostByNameHandle)
return FALSE;
WSASetLastError(WSAEWOULDBLOCK);
return TRUE;
}
sockAddr.sin_family = AF_INET;
sockAddr.sin_port = htons((u_short)nHostPort);
return CAsyncSocketEx::Connect((SOCKADDR*)&sockAddr, sizeof(sockAddr));
}
}
BOOL CAsyncSocketEx::Connect(const SOCKADDR* lpSockAddr, int nSockAddrLen)
{
#ifndef NOLAYERS
if (m_pFirstLayer)
return m_pFirstLayer->Connect(lpSockAddr, nSockAddrLen);
else
#endif //NOLAYERS
return connect(m_SocketData.hSocket, lpSockAddr, nSockAddrLen) != SOCKET_ERROR;
}
#ifdef _AFX
BOOL CAsyncSocketEx::GetPeerName(CString& rPeerAddress, UINT& rPeerPort)
{
#ifndef NOLAYERS
if (m_pFirstLayer)
return m_pFirstLayer->GetPeerName(rPeerAddress, rPeerPort);
#endif NOLAYERS
SOCKADDR_IN sockAddr = {0};
int nSockAddrLen = sizeof(sockAddr);
BOOL bResult = GetPeerName((SOCKADDR*)&sockAddr, &nSockAddrLen);
if (bResult)
{
rPeerPort = ntohs(sockAddr.sin_port);
rPeerAddress = inet_ntoa(sockAddr.sin_addr);
}
return bResult;
}
#endif //AFX
BOOL CAsyncSocketEx::GetPeerName(SOCKADDR* lpSockAddr, int* lpSockAddrLen)
{
#ifndef NOLAYERS
if (m_pFirstLayer)
return m_pFirstLayer->GetPeerName(lpSockAddr, lpSockAddrLen);
#endif //NOLAYERS
if (!getpeername(m_SocketData.hSocket, lpSockAddr, lpSockAddrLen))
return TRUE;
else
return FALSE;
}
#ifdef _AFX
BOOL CAsyncSocketEx::GetSockName(CString& rSocketAddress, UINT& rSocketPort)
{
SOCKADDR_IN sockAddr = {0};
int nSockAddrLen = sizeof(sockAddr);
BOOL bResult = GetSockName((SOCKADDR*)&sockAddr, &nSockAddrLen);
if (bResult)
{
rSocketPort = ntohs(sockAddr.sin_port);
rSocketAddress = inet_ntoa(sockAddr.sin_addr);
}
return bResult;
}
#endif
BOOL CAsyncSocketEx::GetSockName(SOCKADDR* lpSockAddr, int* lpSockAddrLen)
{
if (!getsockname(m_SocketData.hSocket, lpSockAddr, lpSockAddrLen))
return TRUE;
else
return FALSE;
}
BOOL CAsyncSocketEx::ShutDown(int nHow /*=sends*/)
{
#ifndef NOLAYERS
if (m_pFirstLayer)
{
return m_pFirstLayer->ShutDown();
}
else
#endif
{
if (!shutdown(m_SocketData.hSocket, nHow))
return TRUE;
else
return FALSE;
}
}
SOCKET CAsyncSocketEx::Detach()
{
SOCKET socket = m_SocketData.hSocket;
DetachHandle(socket);
m_SocketData.hSocket = INVALID_SOCKET;
return socket;
}
BOOL CAsyncSocketEx::Attach(SOCKET hSocket, long lEvent /*= FD_READ | FD_WRITE | FD_OOB | FD_ACCEPT | FD_CONNECT | FD_CLOSE*/)
{
if (hSocket == INVALID_SOCKET || !hSocket)
return FALSE;
VERIFY( InitAsyncSocketExInstance() );
m_SocketData.hSocket = hSocket;
AttachHandle(hSocket);
return AsyncSelect(lEvent);
}
BOOL CAsyncSocketEx::AsyncSelect(long lEvent /*= FD_READ | FD_WRITE | FD_OOB | FD_ACCEPT | FD_CONNECT | FD_CLOSE*/)
{
ASSERT( m_pLocalAsyncSocketExThreadData );
m_lEvent = lEvent;
#ifndef NOLAYERS
if (!m_pFirstLayer)
#endif //NOLAYERS
{
if (!WSAAsyncSelect(m_SocketData.hSocket, GetHelperWindowHandle(), m_SocketData.nSocketIndex + WM_SOCKETEX_NOTIFY, lEvent))
return TRUE;
else
return FALSE;
}
return TRUE;
}
BOOL CAsyncSocketEx::Listen(int nConnectionBacklog /*=5*/)
{
#ifndef NOLAYERS
if (m_pFirstLayer)
return m_pFirstLayer->Listen(nConnectionBacklog);
#endif //NOLAYERS
if (!listen(m_SocketData.hSocket, nConnectionBacklog))
return TRUE;
else
return FALSE;
}
BOOL CAsyncSocketEx::Accept(CAsyncSocketEx& rConnectedSocket, SOCKADDR* lpSockAddr /*=NULL*/, int* lpSockAddrLen /*=NULL*/)
{
ASSERT( rConnectedSocket.m_SocketData.hSocket == INVALID_SOCKET );
#ifndef NOLAYERS
if (m_pFirstLayer)
{
return m_pFirstLayer->Accept(rConnectedSocket, lpSockAddr, lpSockAddrLen);
}
else
#endif //NOLAYERS
{
SOCKET hTemp = accept(m_SocketData.hSocket, lpSockAddr, lpSockAddrLen);
if (hTemp == INVALID_SOCKET)
return FALSE;
VERIFY(rConnectedSocket.InitAsyncSocketExInstance());
rConnectedSocket.m_SocketData.hSocket = hTemp;
rConnectedSocket.AttachHandle(hTemp);
}
return TRUE;
}
BOOL CAsyncSocketEx::IOCtl(long lCommand, DWORD* lpArgument)
{
return ioctlsocket(m_SocketData.hSocket, lCommand, lpArgument) != SOCKET_ERROR;
}
int CAsyncSocketEx::GetLastError()
{
return WSAGetLastError();
}
BOOL CAsyncSocketEx::TriggerEvent(long lEvent)
{
if (m_SocketData.hSocket == INVALID_SOCKET)
return FALSE;
ASSERT( m_pLocalAsyncSocketExThreadData );
ASSERT( m_pLocalAsyncSocketExThreadData->m_pHelperWindow );
ASSERT( m_SocketData.nSocketIndex != -1 );
#ifndef NOLAYERS
if (m_pFirstLayer)
{
CAsyncSocketExLayer::t_LayerNotifyMsg *pMsg = new CAsyncSocketExLayer::t_LayerNotifyMsg;
pMsg->lEvent = lEvent & 0xFFFF;
pMsg->pLayer = 0;
BOOL res = PostMessage(GetHelperWindowHandle(), WM_SOCKETEX_TRIGGER, (WPARAM)this, (LPARAM)pMsg);
if (!res)
delete pMsg;
return res;
}
else
#endif //NOLAYERS
return PostMessage(GetHelperWindowHandle(), m_SocketData.nSocketIndex + WM_SOCKETEX_NOTIFY, m_SocketData.hSocket, lEvent & 0xFFFF);
}
SOCKET CAsyncSocketEx::GetSocketHandle()
{