Timothy's Space 君看一叶舟，出没风波里

BOOL CMySocket::IsDropped()
{
BOOL bDropped = FALSE;
INT iRet = 0;
BOOL bOK = TRUE;

struct timeval timeout = { 0, 0 };//立刻返回，不阻塞
fd_set readSocketSet;

FD_ZERO( &readSocketSet );
FD_SET( m_hSocket, &readSocketSet );

iRet = ::select( 0, &readSocketSet, NULL, NULL, &timeout );
bOK = ( iRet > 0 );

if( bOK )
{
bOK = FD_ISSET( m_hSocket, &readSocketSet );
}

if( bOK )
{
CHAR szBuffer[1] = “”;
iRet = ::recv( m_hSocket, szBuffer, 1, MSG_PEEK );
bOK = ( iRet > 0 );
if( !bOK )
{
INT iError = ::WSAGetLastError();
bDropped = ( ( iError == WSAENETRESET ) ||
( iError == WSAECONNABORTED ) ||
( iError == WSAECONNRESET ) ||
( iError == WSAEINVAL ) ||
( iRet == 0 ) ); //Graceful disconnect from other side.
}
}

return( bDropped );
}

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