BOOL CSuperSerialCard::CheckComm()
{
m_dwCommInactivity = 0;
if ((m_hCommHandle == -1) && m_dwSerialPort)
{
TCHAR portname[12]; // we have /dev/ttyS0..X instead of COM1..COMX+1?
if(m_dwSerialPort < 0 || m_dwSerialPort > 99) m_dwSerialPort = 1;//buffer overflow check
sprintf(portname, TEXT("/dev/ttyS%u"), (unsigned int)(m_dwSerialPort - 1));
/* m_hCommHandle = CreateFile(portname,
GENERIC_READ | GENERIC_WRITE,
0, // exclusive access
(LPSECURITY_ATTRIBUTES)NULL, // default security attributes
OPEN_EXISTING,
FILE_FLAG_OVERLAPPED, // required for WaitCommEvent()
NULL);*/
m_hCommHandle = open(portname, O_RDWR | O_NOCTTY | O_NDELAY);
if (m_hCommHandle != -1)
{
UpdateCommState();
/* COMMTIMEOUTS ct;
ZeroMemory(&ct,sizeof(COMMTIMEOUTS));
ct.ReadIntervalTimeout = MAXDWORD;
SetCommTimeouts(m_hCommHandle,&ct);*/
CommThInit();
}
else
{
;//DWORD uError = 1;//GetLastError();
}
}
return (m_hCommHandle != -1);
}
BOOL CSuperSerialCard::CheckComm()
{
m_dwCommInactivity = 0;
// check for COM or TCP socket handle, and setup if invalid
if (IsActive())
return true;
if (m_dwSerialPortItem == m_uTCPChoiceItemIdx)
{
// init Winsock 1.1 (for Win95, otherwise could use 2.2)
WSADATA wsaData;
if (WSAStartup(MAKEWORD(1, 1), &wsaData) == 0) // or (2, 2) for Winsock 2.2
{
if (wsaData.wVersion != 0x0101) // or 0x0202 for Winsock 2.2
{
WSACleanup();
return FALSE;
}
// initialized, so try to create a socket
m_hCommListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (m_hCommListenSocket == INVALID_SOCKET)
{
WSACleanup();
return FALSE;
}
// have socket so attempt to bind it
SOCKADDR_IN saAddress;
saAddress.sin_family = AF_INET;
saAddress.sin_port = htons(TCP_SERIAL_PORT); // TODO: get from registry / GUI
saAddress.sin_addr.s_addr = htonl(INADDR_ANY);
if (bind(m_hCommListenSocket, (LPSOCKADDR)&saAddress, sizeof(saAddress)) == SOCKET_ERROR)
{
m_hCommListenSocket = INVALID_SOCKET;
WSACleanup();
return FALSE;
}
// bound, so listen
if (listen(m_hCommListenSocket, 1) == SOCKET_ERROR)
{
m_hCommListenSocket = INVALID_SOCKET;
WSACleanup();
return FALSE;
}
// now send async events to our app's message handler
if (WSAAsyncSelect(
/* SOCKET s */ m_hCommListenSocket,
/* HWND hWnd */ g_hFrameWindow,
/* unsigned int wMsg */ WM_USER_TCP_SERIAL,
/* long lEvent */ (FD_ACCEPT | FD_CONNECT | FD_READ | FD_CLOSE)) != 0)
{
m_hCommListenSocket = INVALID_SOCKET;
WSACleanup();
return FALSE;
}
}
}
else if (m_dwSerialPortItem)
{
_ASSERT(m_dwSerialPortItem < m_vecSerialPortsItems.size()-1); // size()-1 is TCP item
TCHAR portname[SIZEOF_SERIALCHOICE_ITEM];
wsprintf(portname, TEXT("COM%u"), m_vecSerialPortsItems[m_dwSerialPortItem]);
m_hCommHandle = CreateFile(portname,
GENERIC_READ | GENERIC_WRITE,
0, // exclusive access
(LPSECURITY_ATTRIBUTES)NULL, // default security attributes
OPEN_EXISTING,
FILE_FLAG_OVERLAPPED, // required for WaitCommEvent()
NULL);
if (m_hCommHandle != INVALID_HANDLE_VALUE)
{
//BOOL bRes = SetupComm(m_hCommHandle, 8192, 8192);
//_ASSERT(bRes);
UpdateCommState();
// ReadIntervalTimeout=MAXDWORD; ReadTotalTimeoutConstant=ReadTotalTimeoutMultiplier=0:
// Read operation is to return immediately with the bytes that have already been received,
// even if no bytes have been received.
COMMTIMEOUTS ct;
ZeroMemory(&ct,sizeof(COMMTIMEOUTS));
ct.ReadIntervalTimeout = MAXDWORD;
SetCommTimeouts(m_hCommHandle,&ct);
CommThInit();
}
else
{
DWORD uError = GetLastError();
}
}
return IsActive();
}
