// TCP IP DemoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "TCP IP Demo.h"
#include "TCP IP DemoDlg.h"
#include "winsock.h"
#include "Server.h"
#include "string.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#define DEFAULT_BUFFER      1024*16

char    hostname[256];
struct	hostent * pHostent;
struct	sockaddr_in sa;
int		nAdapter;
UINT	m_uPort = 5150;
DWORD   bufsize;
unsigned char    DataBuff[DEFAULT_BUFFER]; 
unsigned int TransLen;

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTCPIPDemoDlg dialog

CTCPIPDemoDlg::CTCPIPDemoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTCPIPDemoDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTCPIPDemoDlg)
	m_SendData = _T("");
	m_ReceiveData = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTCPIPDemoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTCPIPDemoDlg)
	DDX_Control(pDX, IDC_REDIT, m_ReceiveText);
	DDX_Control(pDX, IDC_SEDIT, m_SendText);
	DDX_Text(pDX, IDC_SEDIT, m_SendData);
	DDX_Text(pDX, IDC_REDIT, m_ReceiveData);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTCPIPDemoDlg, CDialog)
	//{{AFX_MSG_MAP(CTCPIPDemoDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_SEND, OnSend)
	ON_MESSAGE(SER_MESSAGE,OnServerMessage)
	ON_BN_CLICKED(IDC_CLEARSEND, OnClearsend)
	ON_BN_CLICKED(IDC_CLEARRECEIVE, OnClearreceive)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTCPIPDemoDlg message handlers

BOOL CTCPIPDemoDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	m_hNetEnableIcon =	AfxGetApp()->LoadIcon(IDI_NETOPEN);
	m_hNetDisableIcon =	AfxGetApp()->LoadIcon(IDI_NETCLOSE);
	((CButton *)GetDlgItem(IDC_NETSTATE))->EnableWindow(TRUE);
	((CButton *)GetDlgItem(IDC_SEND))->EnableWindow(FALSE);
	((CButton *)GetDlgItem(IDC_NETSTATE))->SetIcon(m_hNetDisableIcon);
	
	InitSocket();
	OnSetServer();

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CTCPIPDemoDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CTCPIPDemoDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CTCPIPDemoDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CTCPIPDemoDlg::OnSend() 
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	
	// Get input char
	TransLen = m_SendData.GetLength();
	if (TransLen > DEFAULT_BUFFER)
		TransLen = DEFAULT_BUFFER;
	CopyString((char *)DataBuff, m_SendData, TransLen);
	
	// Send char to dsp
	if(SOCKET_ERROR == send(socket, (char *)DataBuff, TransLen, 0))
	{
		AfxMessageBox("Send data error");
	}
}

//////////////////////////////////////////////////////////////////////////
// 初始化Socket
void CTCPIPDemoDlg::InitSocket()
{
	m_Fopened = FALSE;
	WSADATA wsaData;
	
	WORD version = MAKEWORD(2, 0);
	int ret = WSAStartup(version, &wsaData);
	if(ret != 0)
	{
		AfxMessageBox("Failed in initial socket");
	}
	m_connectionList.RemoveAll();
	ASSERT(m_connectionList.GetCount()==0);
	
	//獲取主機的Ip地址
	int res = gethostname(hostname,sizeof(hostname));
	if(res != 0)
	{
		AfxMessageBox("gethostname is error!");
		return ;
	}
	
	// get the res of the hostname
	pHostent = gethostbyname(hostname);
	if(pHostent ==NULL)
	{
		AfxMessageBox("the Ip address is error!");
		return ;
	}
	for (nAdapter=0; pHostent->h_addr_list[nAdapter]; nAdapter++) 
	{
		memcpy ( &sa.sin_addr.s_addr, pHostent->h_addr_list[nAdapter],pHostent->h_length);
	}	
}

//////////////////////////////////////////////////////////////////////////
// 設置網絡服務器
void CTCPIPDemoDlg::OnSetServer() 
{
	// TODO: Add your control notification handler code here

	m_server.m_addr = sa;
	if(m_server.InitAndListen(this->m_hWnd,m_uPort)==FALSE)
	{
		AfxMessageBox("Set server error!");
		return;
	}
}

//////////////////////////////////////////////////////////////////////////
//Server消息相應函數
LRESULT CTCPIPDemoDlg::OnServerMessage(WPARAM wParam, LPARAM lParam)
{
	int length,len,i;
	CEdit * output=NULL;
	CString Stemp;
	int TotalLen;

	switch(lParam)
	{
	case FD_ACCEPT:
		socket= accept(m_server.m_hSocket,NULL,NULL);
		m_connectionList.AddHead(socket);
		((CButton *)GetDlgItem(IDC_NETSTATE))->SetIcon(m_hNetEnableIcon);		
		((CButton *)GetDlgItem(IDC_SEND))->EnableWindow(TRUE);
		return 0;
		
	case FD_READ:
		length=m_connectionList.GetCount();
		for(i=0;i<length;i++)
		{
			socket=m_connectionList.GetAt(m_connectionList.FindIndex(i));
			if(socket==wParam)
			{
				TotalLen = 0;
Loop1:			
				len = recv(socket,(char *)&DataBuff[TotalLen],TransLen,0);
				
				// If network is error
				if (len == SOCKET_ERROR)	
				{
					AfxMessageBox("Receive data error!");
					return 0;
				}
				TotalLen += len;

				if(len == TransLen)
				{
					Stemp.Empty();
					Stemp = GetString(DataBuff, TotalLen);
					m_ReceiveData += Stemp;
				
					UpdateData(FALSE);
					return 0;
				}	
				else
				{
					TransLen -= len;
					goto Loop1;
				}
			}
		}
		return 0;
		
	case FD_WRITE:
		return 0;
		
	case FD_CLOSE:
		((CButton *)GetDlgItem(IDC_NETSTATE))->SetIcon(m_hNetDisableIcon);		
		((CButton *)GetDlgItem(IDC_SEND))->EnableWindow(FALSE);
		return 0;
		
	default:
		return 0;
	}
}

void CTCPIPDemoDlg::CopyString(char *szTo, CString sFrom, int nLimit)
{
	memset(szTo, 0, nLimit);
	int nLen = sFrom.GetLength();
	
	if(nLen > nLimit)
		nLen = nLimit;
	
	if(nLen > 0)
		memcpy(szTo, LPCTSTR(sFrom), nLen);
}

CString CTCPIPDemoDlg::GetString(BYTE *pBuf, int nMaxLen)
{
	CString sTemp;
	sTemp.Empty();
	
	if(nMaxLen < 1)
		return sTemp;
	
	BYTE* pszTemp = new BYTE[nMaxLen];
	ZeroMemory(pszTemp, nMaxLen);
	memcpy(pszTemp, pBuf, nMaxLen);
	
	sTemp.Format("%s", pszTemp);
	return sTemp;
}

void CTCPIPDemoDlg::OnClearsend() 
{
	// TODO: Add your control notification handler code here
	m_SendData.Empty();
	UpdateData(FALSE);
}

void CTCPIPDemoDlg::OnClearreceive() 
{
	// TODO: Add your control notification handler code here
	m_ReceiveData.Empty();
	UpdateData(FALSE);
}

//////////////////////////////////////////////////////////////////////////
//	No	more
//////////////////////////////////////////////////////////////////////////