基于TCP连接的C S模式的最简单模型代码

Windows Socket(基于TCP连接的)编程的程序代码简单结构.

 

服务端:

   1. 初始化Windows Socket库.

   2. 创建Socket. (socket)

   3. 绑定Socket. (bind: socket绑定本机的一个IP地址和端口)

   4. 监听.(listen: 设置监听, 同时设置监听数量)

   5. Accept. (accept: 服务端每接收到一个客户端的Socket,则创建一个线程,  满足一个服务端连接多个客户端.

   6. 接收、发送数据.(有很多模型选择)

 

客户端

   1. 初始化Windows Socket库.

   2、创建Socket.(socket)

   3、连接Socket.(connect: 连接服务端的IP地址和端口)

   4、接收、发送数据.(有很多模型选择)

 

这是一个最简答的模型了: 就是Server与Client建立通信并可以收发数据的最简单模型.

//
// Server
// Server.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

#include 
#include 
#pragma comment(lib,"ws2_32.lib")

DWORD WINAPI ClientThread(LPVOID lpParameter)
{
    SOCKET clientSocket = (SOCKET)lpParameter;
    int nRet = 0;
    char chRecvBuffer[MAX_PATH];

    while(true)
    {
        memset(chRecvBuffer, 0x00, sizeof(chRecvBuffer));
        nRet = recv(clientSocket, chRecvBuffer, MAX_PATH, 0);
        if(0 == nRet || SOCKET_ERROR == nRet) 
        {
            std::cout << "客户端退出!" << std::endl;
            break;
        }
        std::cout<< "接收到客户信息为:" << chRecvBuffer << std::endl;
    }

    return 0;
}

int _tmain(int argc, _TCHAR* argv[])
{
    WSADATA  wsAData;
    SOCKET serverSocket, clientSocket;
    struct sockaddr_in localAddr, clientAddr;
    int nRet = 0;
    int nAddrLen = 0;
    HANDLE hThread = NULL;

    // 初始化Win Socket
    if(0 != WSAStartup(MAKEWORD(2,2), &wsAData))
    {
        std::cout << "Init Windows Socket Failed. "<< GetLastError() << std::endl;
        return -1;
    }
    
    // 创建Socket
    serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(INVALID_SOCKET == serverSocket)
    {
        std::cout << "Create Socket Failed:" << GetLastError() << std::endl;
        return -1;
    }

    memset(&localAddr, 0x00, sizeof(localAddr));
    localAddr.sin_family = AF_INET;
    localAddr.sin_addr.s_addr = htonl(INADDR_ANY);;		// 这你也可以显式的指定你的本地的IP地址(例如你的电脑有多个IP地址)
    // localAddr.sin_addr.s_addr = inet_addr("172.20.3.30");
    localAddr.sin_port = htons(6123);

    // 绑定地址和端口
    nRet = bind(serverSocket, (struct sockaddr*)&localAddr, sizeof(localAddr));
    if(0 != nRet)
    {
        std::cout << "Bind Socket Failed:" << GetLastError() << std::endl;
        return -1;
    }

	// 设置监听
    nRet = listen(serverSocket, 10);
    if(0 != nRet)
    {
        std::cout << "listen Socket Failed::" << GetLastError() << std::endl;
        return -1;
    }

    std::cout << "Server Begin Accept." << std::endl;

    while(true)
    {
        nAddrLen = sizeof(clientAddr);
		// accept
        clientSocket = accept(serverSocket, (struct sockaddr*)&clientAddr, &nAddrLen);
        if(INVALID_SOCKET == clientSocket)
        {
            std::cout << "Accept Failed:" << GetLastError() << std::endl;
            break;
        }
		
        std::cout << "New Client:" << inet_ntoa(clientAddr.sin_addr) << ":" << clientAddr.sin_port << std::endl;
        
        hThread = CreateThread(NULL, 0, ClientThread, (LPVOID)clientSocket, 0, NULL);
        if(NULL == hThread)
        {
            std::cout << "Create Thread Failed!" << std::endl;
            break;
        }
    }

	// 这里要销毁你的所有client的资源
	// closesocket(clientSocket);
    closesocket(serverSocket);    

    WSACleanup();
    return 0;
}
//

// Client
//
// Client.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

#include 
#include 
#pragma comment(lib,"ws2_32.lib")

int _tmain(int argc, _TCHAR* argv[])
{
    WSADATA  wsAData;
    SOCKET clientSocket;
    struct sockaddr_in serverAddr;
    int nRet = 0;
    char chSendBuffer[MAX_PATH];

    // 初始化Win Sock
    if(0 != WSAStartup(MAKEWORD(2,2), &wsAData))
    {
        std::cout << "Init Windows Socket Failed::" << GetLastError() << std::endl;
        return -1;
    }

    // 创建Socket
    clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(INVALID_SOCKET == clientSocket)
    {
        std::cout <<"Create Socket Failed:"<< GetLastError() << std::endl;
        return -1;
    }

	memset(&serverAddr, 0x00, sizeof(serverAddr));
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = inet_addr("172.20.3.30");
    serverAddr.sin_port = htons(6123);

	// 连接服务器
    nRet = connect(clientSocket,(struct sockaddr*)&serverAddr, sizeof(serverAddr));
    if(SOCKET_ERROR ==  nRet)
    {
        std::cout << "Connect Error:" << GetLastError() << std::endl;
        return -1;
    }
    else
    {
        std::cout << "Connect Successful." << std::endl;
    }

    while ( true )
    {
        std::cin.getline(chSendBuffer, sizeof(chSendBuffer));
        nRet = send(clientSocket, chSendBuffer, (int)strlen(chSendBuffer), 0);
        if(SOCKET_ERROR  == nRet)
        {
            std::cout << "Send Data Error:" << GetLastError() << std::endl;
            break;
        }
    }
    
    closesocket(clientSocket);
    WSACleanup();

    return 0;
}
//

转自: http://www.cppblog.com/bujiwu/archive/2009/01/11/71707.aspx