C++ 简单的 Tcp 实现 socket 客户端与客户端通信

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开发环境  Vs 2008  新建一个 win32 console  project

 

//  服务器端代码

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

#include "stdafx.h"
#include "winsock2.h"
#pragma comment(lib, "ws2_32.lib")

#include
using namespace std;

int _tmain(int argc, char* argv[])
{
    const int BUF_SIZE = 64;

    WSADATA         wsd;            //WSADATA变量
    SOCKET          sServer;        //服务器套接字
    SOCKET          sClient;        //客户端套接字
    SOCKADDR_IN     addrServ;;      //服务器地址
    char            buf[BUF_SIZE];  //接收数据缓冲区
    char            sendBuf[BUF_SIZE];//返回给客户端得数据
    int             retVal;         //返回值

    //初始化套结字动态库
    if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
    {
        cout << "WSAStartup failed!" << endl;
        return 1;
    }

    //创建套接字
    sServer = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(INVALID_SOCKET == sServer)
    {
        cout << "socket failed!" << endl;
        WSACleanup();//释放套接字资源;
        return  -1;
    }

    //服务器套接字地址
    addrServ.sin_family = AF_INET;
    addrServ.sin_port = htons(4999);
    addrServ.sin_addr.s_addr = INADDR_ANY;
    //绑定套接字
    retVal = bind(sServer, (LPSOCKADDR)&addrServ, sizeof(SOCKADDR_IN));

    if(SOCKET_ERROR == retVal)
    {
        cout << "bind failed!" << endl;
        closesocket(sServer);   //关闭套接字
        WSACleanup();           //释放套接字资源;
        return -1;
    }

    //开始监听
    retVal = listen(sServer, 1);
    if(SOCKET_ERROR == retVal)
    {
        cout << "listen failed!" << endl;
        closesocket(sServer);   //关闭套接字
        WSACleanup();           //释放套接字资源;
        return -1;
    }

    //接受客户端请求
    sockaddr_in addrClient;
    int addrClientlen = sizeof(addrClient);
    sClient = accept(sServer,(sockaddr FAR*)&addrClient, &addrClientlen);
    if(INVALID_SOCKET == sClient)
    {
        cout << "accept failed!" << endl;
        closesocket(sServer);   //关闭套接字
        WSACleanup();           //释放套接字资源;
        return -1;
    }


    while(true){
        //接收客户端数据
        ZeroMemory(buf, BUF_SIZE);
        retVal = recv(sClient, buf, BUF_SIZE, 0);
        if (SOCKET_ERROR == retVal)
        {
            cout << "recv failed!" << endl;
            closesocket(sServer);   //关闭套接字
            closesocket(sClient);   //关闭套接字
            WSACleanup();           //释放套接字资源;
            return -1;
        }
        if(buf[0] == '0')
            break;
        cout << "客户端发送的数据: " << buf <

        cout << "向客户端发送数据: " ;
        cin >> sendBuf;

        send(sClient, sendBuf, strlen(sendBuf), 0);
    }

    //退出
    closesocket(sServer);   //关闭套接字
    closesocket(sClient);   //关闭套接字
    WSACleanup();           //释放套接字资源;


    return 0;
}

// Server.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "winsock2.h"#pragma comment(lib, "ws2_32.lib")#include using namespace std;int _tmain(int argc, char* argv[]){ const int BUF_SIZE = 64; WSADATA   wsd;   //WSADATA变量 SOCKET   sServer;  //服务器套接字 SOCKET   sClient;  //客户端套接字 SOCKADDR_IN  addrServ;;  //服务器地址 char   buf[BUF_SIZE]; //接收数据缓冲区 char   sendBuf[BUF_SIZE];//返回给客户端得数据 int    retVal;   //返回值 //初始化套结字动态库 if (WSAStartup(MAKEWORD(2,2), &wsd) != 0) {  cout << "WSAStartup failed!" << endl;  return 1; }  //创建套接字 sServer = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);  if(INVALID_SOCKET == sServer) {  cout << "socket failed!" << endl;  WSACleanup();//释放套接字资源;  return  -1; }  //服务器套接字地址  addrServ.sin_family = AF_INET; addrServ.sin_port = htons(4999); addrServ.sin_addr.s_addr = INADDR_ANY;   //绑定套接字 retVal = bind(sServer, (LPSOCKADDR)&addrServ, sizeof(SOCKADDR_IN)); if(SOCKET_ERROR == retVal) {   cout << "bind failed!" << endl;  closesocket(sServer); //关闭套接字  WSACleanup();   //释放套接字资源;  return -1; }  //开始监听  retVal = listen(sServer, 1); if(SOCKET_ERROR == retVal) {  cout << "listen failed!" << endl;    closesocket(sServer); //关闭套接字  WSACleanup();   //释放套接字资源;  return -1; }  //接受客户端请求 sockaddr_in addrClient; int addrClientlen = sizeof(addrClient); sClient = accept(sServer,(sockaddr FAR*)&addrClient, &addrClientlen); if(INVALID_SOCKET == sClient) {  cout << "accept failed!" << endl;    closesocket(sServer); //关闭套接字  WSACleanup();   //释放套接字资源;  return -1; }  while(true){  //接收客户端数据  ZeroMemory(buf, BUF_SIZE);  retVal = recv(sClient, buf, BUF_SIZE, 0);  if (SOCKET_ERROR == retVal)  {   cout << "recv failed!" << endl;     closesocket(sServer); //关闭套接字   closesocket(sClient); //关闭套接字     WSACleanup();   //释放套接字资源;   return -1;  }  if(buf[0] == '0')   break;  cout << "客户端发送的数据: " << buf <> sendBuf;    send(sClient, sendBuf, strlen(sendBuf), 0); }  //退出 closesocket(sServer); //关闭套接字 closesocket(sClient); //关闭套接字 WSACleanup();   //释放套接字资源;  return 0;}

 

//  客户端代码

 

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

#include "stdafx.h"
#include "winsock2.h"
#include
#pragma comment(lib, "ws2_32.lib")

using namespace std;
BOOL    RecvLine(SOCKET s, char* buf);  //读取一行数据

int main(int argc, char* argv[])
{
    const int BUF_SIZE = 64;

    WSADATA         wsd;            //WSADATA变量
    SOCKET          sHost;          //服务器套接字
    SOCKADDR_IN     servAddr;       //服务器地址
    char            buf[BUF_SIZE];  //接收数据缓冲区
    char            bufRecv[BUF_SIZE];
    int             retVal;         //返回值

    //初始化套结字动态库
    if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
    {
        cout << "WSAStartup failed!" << endl;
        return -1;
    }

    //创建套接字
    sHost = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(INVALID_SOCKET == sHost)
    {
        cout << "socket failed!" << endl;
        WSACleanup();//释放套接字资源
        return  -1;
    }

    //设置服务器地址
    servAddr.sin_family =AF_INET;
    servAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    servAddr.sin_port = htons((short)4999);
    int nServAddlen  = sizeof(servAddr);

    //连接服务器
    retVal=connect(sHost,(LPSOCKADDR)&servAddr, sizeof(servAddr));
    if(SOCKET_ERROR == retVal)
    {
        cout << "connect failed!" << endl;
        closesocket(sHost); //关闭套接字
        WSACleanup();       //释放套接字资源
        return -1;
    }
    while(true){
        //向服务器发送数据
        ZeroMemory(buf, BUF_SIZE);
        cout << " 向服务器发送数据:  ";
        cin >> buf;
        retVal = send(sHost, buf, strlen(buf), 0);
        if (SOCKET_ERROR == retVal)
        {
            cout << "send failed!" << endl;
            closesocket(sHost); //关闭套接字
            WSACleanup();       //释放套接字资源
            return -1;
        }
        //RecvLine(sHost, bufRecv);
        recv(sHost, bufRecv,5 , 0);     // 接收服务器端的数据， 只接收5个字符
        cout << endl <<"从服务器接收数据：" << bufRecv;

    }
    //退出
    closesocket(sHost); //关闭套接字
    WSACleanup();       //释放套接字资源
    return 0;
}

// Client.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "winsock2.h"#include #pragma comment(lib, "ws2_32.lib")using namespace std;BOOL RecvLine(SOCKET s, char* buf); //读取一行数据int main(int argc, char* argv[]){ const int BUF_SIZE = 64; WSADATA   wsd;   //WSADATA变量 SOCKET   sHost;   //服务器套接字 SOCKADDR_IN  servAddr;  //服务器地址 char   buf[BUF_SIZE]; //接收数据缓冲区 char   bufRecv[BUF_SIZE]; int    retVal;   //返回值  //初始化套结字动态库 if (WSAStartup(MAKEWORD(2,2), &wsd) != 0) {  cout << "WSAStartup failed!" << endl;  return -1; }  //创建套接字 sHost = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);  if(INVALID_SOCKET == sHost) {  cout << "socket failed!" << endl;  WSACleanup();//释放套接字资源  return  -1; } //设置服务器地址 servAddr.sin_family =AF_INET; servAddr.sin_addr.s_addr = inet_addr("127.0.0.1"); servAddr.sin_port = htons((short)4999); int nServAddlen  = sizeof(servAddr); //连接服务器 retVal=connect(sHost,(LPSOCKADDR)&servAddr, sizeof(servAddr));  if(SOCKET_ERROR == retVal) {  cout << "connect failed!" << endl;   closesocket(sHost); //关闭套接字  WSACleanup();  //释放套接字资源  return -1; } while(true){  //向服务器发送数据  ZeroMemory(buf, BUF_SIZE);  cout << " 向服务器发送数据:  ";  cin >> buf;  retVal = send(sHost, buf, strlen(buf), 0);  if (SOCKET_ERROR == retVal)  {   cout << "send failed!" << endl;   closesocket(sHost); //关闭套接字   WSACleanup();  //释放套接字资源   return -1;  }  //RecvLine(sHost, bufRecv);  recv(sHost, bufRecv,5 , 0);  // 接收服务器端的数据， 只接收5个字符  cout << endl <<"从服务器接收数据：" << bufRecv; } //退出 closesocket(sHost); //关闭套接字 WSACleanup();  //释放套接字资源 return 0;}

 

 

 

 

 

 

 

           

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