VC++ TCP網絡控制台程序

本文轉載自查看原文 2017-12-18 18:53 1239 C/C++/ Windows程序設計

在Windows7系統下，采用工具為VS2008，Win32控制台應用程序，編寫一個基於TCP的Client/Server網絡程序。

1、服務器端代碼

#include <WinSock2.h>  
#include <stdio.h>  //VS2012創建的MFC Win32控制台應用程序中，此處默認包含的是#include "stdafx.h"，其中stdio.h頭文件已經被包含進stdafx.h中了，不再需要重復包含
  
#define SERVERPORT 6000 //服務端口號
#pragma comment(lib,"WS2_32.lib")
  
int main(int argc, char *argv[])  
{  
    //加載套接字庫  
    WORD wVersionRequested;//用於保存WinSock庫的版本號  
    WSADATA wsaData;  
    int err;  
      
    printf("This is a Server side application!\n");  
  
    wVersionRequested = MAKEWORD(2,2);  
  
    err = WSAStartup( wVersionRequested, &wsaData);  
    if (err != 0)  
    {  
        printf("WSAStartup() called failed!\n");  
        return -1;  
    }  
    else  
    {  
        printf("WSAStartup() called successful!\n");  
    }  
  
    if (LOBYTE(wsaData.wVersion) != 2 ||  
          HIBYTE(wsaData.wVersion) != 2)  
    {  
        //若不是所請求的版本號2.2，則終止WinSock庫的使用  
        WSACleanup();  
        return -1;  
    }  
  
    //創建用於監聽的套接字  
    SOCKET sockServer = socket(AF_INET, SOCK_STREAM, 0);  
    if(sockServer == INVALID_SOCKET)  
    {  
        printf("socket() called failed! ,error code is: %d", WSAGetLastError());  
        return -1;  
    }  
    else  
    {  
        printf("socket() called successful!\n");  
    }  
      
    //填充服務器端套接字結構  
    SOCKADDR_IN addrServer;  
    addrServer.sin_addr.S_un.S_addr = htonl(INADDR_ANY);//將主機字節順序轉換成TCP/IP網絡字節順序  
    addrServer.sin_family = AF_INET;  
    addrServer.sin_port = htons(SERVERPORT);  
  
    //將套接字綁定到一個本地地址和端口上  
    err = bind(sockServer, (SOCKADDR*)&addrServer, sizeof(SOCKADDR));  
    if (err == SOCKET_ERROR)  
    {  
        printf("bind() called failed! The error code is: %d\n", WSAGetLastError());  
        return -1;  
    }  
    else  
    {  
        printf("bind() called successful\n");  
    }  
    //將套接字設置為監聽模式，准備接收客戶請求  
    err = listen(sockServer, 5);  
    if (err == SOCKET_ERROR)  
    {  
        printf("listen() called failed! The error code is: %d\n", WSAGetLastError());  
        return -1;  
    }  
    else  
    {  
        printf("listen() called successful!\n");  
    }  
  
    SOCKADDR_IN addrClient; //保存發送請求連接的客戶端的套接字信息  
    int len = sizeof(SOCKADDR);  
      
    while(1)  
    {  
        //等待客戶請求到來  
        SOCKET sockConn = accept(sockServer, (SOCKADDR*)&addrClient, &len);  
        if (sockConn == INVALID_SOCKET)  
        {  
            printf("accept() called falied! The error code is: %d\n", WSAGetLastError());  
        }  
        else  
        {  
            printf("The Server receive a new client connection!\n");  
        }  
  
        char sendBuf[100];  
        sprintf_s(sendBuf, 100, "Welcome %s",inet_ntoa(addrClient.sin_addr));  
  
        //發送數據  
        send(sockConn, sendBuf, strlen(sendBuf)+1 , 0);  
        char recvBuf[100];  
        //接收數據  
        recv(sockConn, recvBuf, 100, 0);  
        //打印接收到的數據  
        printf("receive data from client side [%s,%d] is: %s\n", inet_ntoa(addrClient.sin_addr), addrClient.sin_port,  
                              recvBuf);  
        closesocket(sockConn);  //關閉連接套接字  
    }  
  
    return 0;  
}

2、客戶端代碼

#include <WinSock2.h>  
#include <stdio.h>  
  
#define SERVERPORT 6000 //服務端口號  
  
#pragma comment(lib, "WS2_32.lib")
  
int main(int argc, char *argv[])  
{  
    //加載套接字庫  
    WORD wVersionRequested;  
    WSAData wsaData;  
    int err;  
  
    printf("This is a Client side application!\n");  
  
    wVersionRequested = MAKEWORD( 2, 2 );  
  
    err = WSAStartup(wVersionRequested, &wsaData);  
    if (err != 0 )  
    {  
        /* Tell the user that we could not find a usable */  
        /* WinSock DLL.                                  */  
        printf("WSAStartup() called failed!\n");  
        return -1;  
    }  
    else  
    {  
        printf("WSAStartup() called successful!\n");  
    }  
  
    if ( LOBYTE( wsaData.wVersion ) != 2 ||  
        HIBYTE( wsaData.wVersion ) != 2 ) {  
            /* Tell the user that we could not find a usable */  
            /* WinSock DLL.                                  */  
            WSACleanup( );  
            return -1;   
    }  
  
    /* The WinSock DLL is acceptable. Proceed. */  
      
    //創建套接字  
    SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0);  
    if(sockClient == INVALID_SOCKET)  
    {  
        printf("socket() called failed! ,error code is: %d", WSAGetLastError());  
        return -1;  
    }  
    else  
    {  
        printf("socket() called successful!\n");  
    }  
      
    //需要連接的服務端套接字結構信息  
    SOCKADDR_IN addrServer;  
    addrServer.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");//設定服務器的IP地址  
    addrServer.sin_family = AF_INET;  
    addrServer.sin_port = htons(SERVERPORT);//設定服務器的端口號(使用網絡字節序)  
        
    //向服務器發出連接請求  
    err = connect(sockClient, (SOCKADDR*)&addrServer, sizeof(SOCKADDR));  
    if (err == SOCKET_ERROR)  
    {  
        printf("connect() called failed! The error code is: %d\n", WSAGetLastError());  
        return -1;  
    }  
    else  
    {  
        printf("connect() called successful\n");  
    }  
  
    //接收數據  
    char recvBuf[100]={0};  
    recv(sockClient, recvBuf, 100, 0);  
    printf("receive data from server side is: %s\n", recvBuf);  
                                         
    //發送數據  
    send(sockClient, "This is a client side!\n", strlen("This is a client side!\n")+1, 0);  
  
    //關閉套接字  
    closesocket(sockClient);  
      
    //終止套接字庫的使用  
    WSACleanup();  
  
    return 0;  
}