serverdlg.cpp

用MFC 开发的基于UDP协议的网络科学计算中心,比较适用于局域网内

// serverDlg.cpp : implementation file
//
#include "stdafx.h"
#include "server.h"
#include "serverDlg.h"
#include "UserInfors.h"
#include "winsock2.h"
#pragma comment (lib,"ws2_32.lib")
#include"fun1.h"
#pragma comment(lib,"fun1.lib")
#include"fun2.h"
#pragma comment(lib,"fun2.lib")
#include<stdio.h>
#include "UserManage.h"

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

/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CServerDlg dialog

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

void CServerDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CServerDlg)
	DDX_Control(pDX, IDC_IPADDRESS1, m_nServerAddr);
	DDX_Control(pDX, IDC_EDITSTIC, m_nStatic);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CServerDlg, CDialog)
	//{{AFX_MSG_MAP(CServerDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_DEFAULT, OnDefault)
	ON_BN_CLICKED(IDC_BUTTON1, OnSuspend)
	ON_BN_CLICKED(IDC_BUTTON2, OnResume)
	ON_BN_CLICKED(IDC_BUTTON4, OnUserManage)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CServerDlg message handlers
CServerDlg *g_dlg;
BOOL CServerDlg::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
	g_dlg = this;
	flag = 1;
//	strServer="0.0.0.0";
	return TRUE;  // return TRUE  unless you set the focus to a control
}

UINT SelThread(LPVOID p)
{
	while(true)
	{
		g_dlg->DealRequest();
		Sleep(300);
	}
	return 0;
}

void CServerDlg::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 CServerDlg::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 CServerDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CServerDlg::OnDefault() 
{
    strServer="127.0.0.1";
	m_nServerAddr.SetWindowText(strServer);
	UpdateData(FALSE);
}

struct recvParam
{
	int flag;
	char a[10];
	char b[10];
	char c[10];
	char d[10];
	char m[10];
	char n[10];
};
struct sendParam
{  
	int flag;
	char x1[10];
	char x2[10];
};

void CServerDlg::DealRequest()
{
	//Socket初始化：
	CString str;
    WORD wVersionRequested;
	WSADATA wsaData;
	int err;
	wVersionRequested = MAKEWORD( 2, 2 );
	err = WSAStartup( wVersionRequested, &wsaData );
	if ( err != 0 ) {
		/* Tell the user that we could not find a usable */
		/* WinSock DLL.                                  */
		return;
	}
    //定义服务器端Socket:
	SOCKET servSock = socket(AF_INET,SOCK_DGRAM,0);
	if(servSock == INVALID_SOCKET)
	{
		MessageBox("Create socket Error");
		return;
	}
    //从编辑框获得服务器地址：

    m_nServerAddr.GetWindowText(strServer);

/*	if(0==strcmp(strServer,"0.0.0.0"))
	{
		m_nStatic.SetWindowText("请输入IP地址");
		return;
	}
*/
    //定义服务器端结构地址：
	sockaddr_in my_addr;
	my_addr.sin_family = AF_INET;
	my_addr.sin_port   = htons(8341);
	my_addr.sin_addr.S_un.S_addr = inet_addr(strServer);
    //服务器地址绑定：
	if(SOCKET_ERROR == bind(servSock,(sockaddr*)&my_addr,sizeof(my_addr)))
	{
		MessageBox("Bind Error");
		return;
	}

    //定义一个用于接受客户端地址结构信息的地址结构：
	sockaddr_in from_addr;

	int len = sizeof(from_addr);

	//定义接受和发送两个缓冲区
	char sendbuf[100];
	char recvbuf[100];

	//接受来自客户端的数据报
	recvfrom(servSock,recvbuf,sizeof(recvbuf),0,(sockaddr*)&from_addr,&len);

	recvParam recvp;
	memcpy(&recvp,recvbuf,sizeof(recvbuf));
	//不同运算不同处理方式：
	sendParam q;
	int flag;
	double a, b, c, d, m, n;
	switch(recvp.flag)
	{
	//一元二次方程计算：
	case 1:
		a=atof(recvp.a);
		b=atof(recvp.b);
		c=atof(recvp.c);            
        flag=fun1(&a,&b,&c);

        switch(flag)
		{
		 //判别式大于零：
         case 0:
		 q.flag = 0;
		 sprintf(q.x1, "%lf", a);
		 sprintf(q.x2, "%lf", b);
		 memcpy(sendbuf,&q,sizeof(q));
	     sendto(servSock, sendbuf,sizeof(sendbuf),0,(sockaddr*)&from_addr,len);
         break;
		 //判别式等于零：
         case 1:
		 q.flag = 1;
	     sprintf(q.x1, "%lf", a);
		 sprintf(q.x2, "%lf", b);
         memcpy(sendbuf,&q,sizeof(q));
	     sendto(servSock, sendbuf,sizeof(sendbuf),0,(sockaddr*)&from_addr,len);
	     break;
         //判别式小于零：
         default:
	     q.flag = 2;
		 memcpy(sendbuf,&q,sizeof(q));
	     sendto(servSock, sendbuf,sizeof(sendbuf),0,(sockaddr*)&from_addr,len);
	     break;
		}
	break;

	case 2:
		a=atof(recvp.a);
		b=atof(recvp.b);
		c=atof(recvp.c);     
		d=atof(recvp.d);
		m=atof(recvp.m);
		n=atof(recvp.n); 
        flag=fun2(&a,&b,&m,&c,&d,&n);
		switch(flag)
		{
		 //有唯一解的情况：
         case 0:
		 q.flag = 0;
		 sprintf(q.x1, "%lf", a);
		 sprintf(q.x2, "%lf", b);
		 memcpy(sendbuf,&q,sizeof(q));
	     sendto(servSock, sendbuf,sizeof(sendbuf),0,(sockaddr*)&from_addr,len);
         break;
		 //y有唯一解，x为任意解的情况：
         case 1:
		 q.flag = 1;
		 sprintf(q.x2, "%lf", b);
         memcpy(sendbuf,&q,sizeof(q));
	     sendto(servSock, sendbuf,sizeof(sendbuf),0,(sockaddr*)&from_addr,len);
	     break;
         //判别式小于零：
         case 2:
	     q.flag = 2;
		 sprintf(q.x1, "%lf", a);
         memcpy(sendbuf,&q,sizeof(q));
	     sendto(servSock, sendbuf,sizeof(sendbuf),0,(sockaddr*)&from_addr,len);
	     break;
		 //x与y有无穷解的情况
		 case 3:
	     q.flag = 3;
         memcpy(sendbuf,&q,sizeof(q));
	     sendto(servSock, sendbuf,sizeof(sendbuf),0,(sockaddr*)&from_addr,len);
		 //无解的情况
		 default:
		 q.flag = 4;
		 memcpy(sendbuf,&q,sizeof(q));
	     sendto(servSock, sendbuf,sizeof(sendbuf),0,(sockaddr*)&from_addr,len);
		}
	break;
	case 3:
		 break;
    //判断认证：
	case 4:
		UserInfors set;
		bool fla=false;
		set.Open();
	    while(!set.IsEOF())
		{ 
	    	if(0==strcmp(recvp.a,set.m_uname)&&0==strcmp(recvp.b,set.m_password))
			{
		    	sendto(servSock,"Login secucessful!",strlen("Login secucessful!")+1,0,(sockaddr*)&from_addr,len);
                fla=true;
			}
	    	set.MoveNext();
		}
		set.Close();
		if(fla==false)
        sendto(servSock,"UserID or Keywords wrong!",strlen("UserID or Keywords wrong!")+1,0,(sockaddr*)&from_addr,len);
	    
        break;
	}

	closesocket(servSock);
	WSACleanup();
}

CWinThread *pCurThread = NULL;

void CServerDlg::OnOK() 
{
	// TODO: Add extra validation here
	if(pCurThread==NULL)
	{
		pCurThread = AfxBeginThread(SelThread, NULL);
		m_nStatic.SetWindowText("服务器已经开启···");
	}
}


void CServerDlg::OnSuspend() 
{
	// TODO: Add your control notification handler code here
	if(pCurThread!=NULL&&flag==1)
	{
		pCurThread->SuspendThread();
		flag = 0;
		m_nStatic.SetWindowText("服务器已经挂起···");
	}
}

void CServerDlg::OnResume() 
{
	// TODO: Add your control notification handler code here
	if(pCurThread!=NULL&&flag==0)
	{
		pCurThread->ResumeThread();
		flag = 1;
		m_nStatic.SetWindowText("服务器已经恢复开启···");
	}
}


void CServerDlg::OnUserManage() 
{
	// TODO: Add your control notification handler code here
	UserManage usermanage;
	usermanage.DoModal();
}