用UDP实现聊天功能
// SK003Dlg.cpp : implementation file
//
#include "stdafx.h"
#include "SK003.h"
#include "SK003Dlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define WM_RECVTEXT (WM_USER + 100)
/////////////////////////////////////////////////////////////////////////////
// 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()
/////////////////////////////////////////////////////////////////////////////
// CSK003Dlg dialog
CSK003Dlg::CSK003Dlg(CWnd* pParent /*=NULL*/)
: CDialog(CSK003Dlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CSK003Dlg)
m_strTarget = _T("");
m_strUser = _T("");
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CSK003Dlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CSK003Dlg)
DDX_Control(pDX, IDC_LIST_MESSAGE, m_MessageList);
DDX_Control(pDX, IDC_EDIT_WRITE, m_EditWrite);
DDX_Text(pDX, IDC_EDIT_TARGET, m_strTarget);
DDX_Text(pDX, IDC_EDIT_USER, m_strUser);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CSK003Dlg, CDialog)
//{{AFX_MSG_MAP(CSK003Dlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_BUTTON_SEND, OnButtonSend)
ON_BN_CLICKED(IDC_BUTTON_COMFIRM, OnButtonComfirm)
ON_MESSAGE(WM_RECVTEXT, OnRecvText)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CSK003Dlg message handlers
BOOL CSK003Dlg::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
WSADATA wsadata;
WSAStartup(MAKEWORD(2, 2), &wsadata);
m_bCreateSocket = FALSE;
EnableCtrl(FALSE);
return TRUE; // return TRUE unless you set the focus to a control
}
void CSK003Dlg::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 CSK003Dlg::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 CSK003Dlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
BOOL CSK003Dlg::CreateUDPSocket(USHORT uPort)
{
SOCKET sock;
SOCKADDR_IN addr;
sock = socket(AF_INET, SOCK_DGRAM, 0);
int optval = 1;
if(SOCKET_ERROR == setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char*)&optval, sizeof(optval)))
{
closesocket(sock);
return FALSE;
}
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_family = AF_INET;
addr.sin_port = htons(uPort);
if(SOCKET_ERROR == bind(sock, (SOCKADDR*)&addr, sizeof(addr)))
{
closesocket(sock);
AfxMessageBox("绑定端口失败");
return FALSE;
}
m_hSocket = sock;
return TRUE;
}
void CSK003Dlg::OnButtonSend()
{
// TODO: Add your control notification handler code here
CString strText;
m_EditWrite.GetWindowText(strText);
if(strText.IsEmpty())
{
AfxMessageBox("发送信息不能为空!");
return;
}
CString strBuffer;
strBuffer = m_strName;
strBuffer += ":";
strBuffer += strText;
int nLen = strBuffer.GetLength();
if(nLen > 4096)
{
AfxMessageBox("发送信息的长度太长未能发送!");
return;
}
sendto(m_hSocket, strBuffer.GetBuffer(0), nLen, 0, (SOCKADDR*)&m_addrRemote, sizeof(SOCKADDR_IN));
strBuffer.ReleaseBuffer();
m_EditWrite.SetWindowText("");
}
void CSK003Dlg::OnButtonComfirm()
{
// TODO: Add your control notification handler code here
UpdateData(TRUE);
if(m_strTarget.IsEmpty())
{
AfxMessageBox("信息发送的目的地址不能为空.");
return;
}
if(m_strUser.IsEmpty())
{
AfxMessageBox("用户名不能为空,请填写任意用户名");
return;
}
DWORD dwAddr = inet_addr(m_strTarget);
m_addrRemote.sin_addr.s_addr = dwAddr;
m_addrRemote.sin_family = AF_INET;
m_addrRemote.sin_port = htons(6517);
m_strName = m_strUser;
if(!CreateUDPSocket(6517))
{
AfxMessageBox("创建UDP套接口失败!");
return;
}
AfxMessageBox("创建UDP套接口成功!");
CreateThread(NULL, 0, RecvFromThreadProc, this, 0, NULL);
m_bCreateSocket = TRUE;
EnableCtrl(TRUE);
}
DWORD WINAPI RecvFromThreadProc(LPVOID param)
{
int nRecv = 0;
char pBuffer[4097];
SOCKADDR_IN addr;
int addrlen = sizeof(addr);
CSK003Dlg *pMainWnd = (CSK003Dlg*)param;
while (TRUE)
{
memset(pBuffer, 0, 4096);
nRecv = recvfrom(pMainWnd->m_hSocket, pBuffer, 4096, 0, (sockaddr*)&addr, &addrlen);
if(nRecv == -1) break;
pMainWnd->SendMessage(WM_RECVTEXT, 0, (LPARAM)pBuffer);
}
return 0L;
}
LRESULT CSK003Dlg::OnRecvText(WPARAM wParam, LPARAM lParam)
{
LPCTSTR lpszText = (LPCTSTR)lParam;
m_MessageList.AddString(lpszText);
return 0L;
}
void CSK003Dlg::EnableCtrl(BOOL bChecked)
{
CWnd *pWnd;
CEdit *pEdit;
pWnd = GetDlgItem(IDC_BUTTON_COMFIRM);
pWnd->EnableWindow(!bChecked);
pEdit = (CEdit*)GetDlgItem(IDC_EDIT_TARGET);
pEdit->SetReadOnly(bChecked);
pEdit = (CEdit*)GetDlgItem(IDC_EDIT_USER);
pEdit->SetReadOnly(bChecked);
pWnd = GetDlgItem(IDC_BUTTON_SEND);
pWnd->EnableWindow(bChecked);
pEdit = (CEdit*)GetDlgItem(IDC_EDIT_WRITE);
pEdit->SetReadOnly(!bChecked);
}
