c++ socket最简单实例源码(含服务端以及客户端)

【实例截图】

【核心代码】

// ServerDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Server.h"
#include "ServerDlg.h"



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

////////////////////////////////////////////////////////////////////////////
//全局变量

CWinThread *pThread = NULL;

bool m_exit = false;

unsigned int StartServer(LPVOID lParam)
{
	//初始化Winscok
	if (!AfxSocketInit())
	{
		AfxMessageBox(IDP_SOCKETS_INIT_FAILED);
		return 1;
	}

	m_exit = false;

	CServerDlg *aDlg = (CServerDlg *)lParam;

	//获取端口
	CString strPort;
	aDlg->GetDlgItemText(IDC_EDIT_PORT, strPort);
	UINT nPort = atoi(strPort);
	
	//socket----创建2个socket--------------------------------------------
	CSocket aSocket, serverSocket;
	//最好不要使用aSocket.Create创建，因为容易会出现10048错误
	if (!aSocket.Socket())
	{
		char szError[256] = {0};
		sprintf(szError, "Create Faild: %d", GetLastError());
		AfxMessageBox(szError);
		return 1; 
	}

	BOOL bOptVal = TRUE;
	int bOptLen = sizeof(BOOL);
	//设置Socket的选项, 解决10048错误必须的步骤
	aSocket.SetSockOpt(SO_REUSEADDR, (void *)&bOptVal, bOptLen, SOL_SOCKET);
	
	 //绑定
	if (!aSocket.Bind(nPort))
	{
		char szError[256] = {0};
		sprintf(szError, "Bind Faild: %d", GetLastError());
		AfxMessageBox(szError);	
		return 1; 
	}

	//监听
	if(!aSocket.Listen(10))
	{	
		char szError[256] = {0};
		sprintf(szError, "Listen Faild: %d", GetLastError());
		AfxMessageBox(szError);
		return 1;
	}
	
	CString strText;
	aDlg->GetDlgItemText(IDC_EDIT_LOG, strText);
	strText  = "服务已经开启! \r\n";
	aDlg->SetDlgItemText(IDC_EDIT_LOG, strText);
	while(!m_exit)
	{
		//接收外部连接
		if(!aSocket.Accept(serverSocket))
		{
			continue;
		}
		else
		{
			char szRecvMsg[256] = {0};
			char szOutMsg[256] = {0};	
			serverSocket.Receive(szRecvMsg, 256); //接收客户端内容:阻塞
			sprintf(szOutMsg, "接受到的参数是: %s \r\n", szRecvMsg);
			aDlg->GetDlgItemText(IDC_EDIT_LOG, strText);
			strText  = szOutMsg;
			aDlg->SetDlgItemText(IDC_EDIT_LOG, strText);
			serverSocket.Send("服务器已经收到，已经做出操作！", 50);//发送内容给客户端
			serverSocket.Close();//关闭
		}
		
	}
	
	aSocket.Close();
	serverSocket.Close();
	aDlg->GetDlgItemText(IDC_EDIT_LOG, strText);
	strText  = "Have Close!";
	aDlg->SetDlgItemText(IDC_EDIT_LOG, strText);
	return 0;
}

void StopServer()
{
	m_exit = true;
}

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

CServerDlg::CServerDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CServerDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CServerDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}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)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CServerDlg, CDialog)
	//{{AFX_MSG_MAP(CServerDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_OPEN, OnButtonOpen)
	ON_BN_CLICKED(IDC_BUTTON_CLOSE, OnButtonClose)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CServerDlg message handlers

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

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

// 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::OnButtonOpen() 
{
	// TODO: Add your control notification handler code here
	pThread = new CWinThread(StartServer, (LPVOID)this);
	pThread->CreateThread(CREATE_SUSPENDED);
	pThread->ResumeThread();
	SetDlgStatus(true);
}

void CServerDlg::OnButtonClose() 
{
	// TODO: Add your control notification handler code here
	StopServer();
	pThread->SuspendThread();
	delete pThread;
	pThread = NULL;
	SetDlgStatus(false);
}

void CServerDlg::SetDlgStatus(bool isOpen)
{	
	this->GetDlgItem(IDC_BUTTON_OPEN)->EnableWindow(!isOpen);
	this->GetDlgItem(IDC_BUTTON_CLOSE)->EnableWindow(isOpen);
	this->GetDlgItem(IDC_EDIT_PORT)->EnableWindow(!isOpen);
}