在Windows中利用socket进行一次、循环传输数据

运行程序的时候,一般都是先运行server端,后运行client端
一次传输
server 端

#include 
#include 
#pragma comment (lib, "ws2_32.lib")  //加载 ws2_32.dll,不加载的话,好像会出错
#pragma warning(disable:4996)

int main()
{
    //初始化 DLL
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);

    //创建套接字
    SOCKET servSock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

    //绑定套接字
    sockaddr_in sockAddr;
    memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
    sockAddr.sin_family = PF_INET;  //使用IPv4地址
    sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");  //具体的IP地址
    sockAddr.sin_port = htons(18000);  //端口
    bind(servSock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));

    //进入监听状态
    listen(servSock, 20);
    //接收客户端请求
    SOCKADDR clntAddr;
    int nSize = sizeof(SOCKADDR);
    SOCKET clntSock = accept(servSock, (SOCKADDR*)&clntAddr, &nSize);
    //向客户端发送数据
    char *str = "Hello World!";
    send(clntSock, str, strlen(str) + sizeof(char), NULL);
    //关闭套接字
    closesocket(clntSock);
    closesocket(servSock);
    //终止 DLL 的使用
    WSACleanup();
    system("pause");
    return 0;
}

client 端

#include 
#include 
#include 
#pragma comment(lib, "ws2_32.lib")  //加载 ws2_32.dll
#pragma warning(disable:4996)
int main()
{
    //初始化DLL
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);//采用的是最新的2.2版本   MAKEWORD()用以对版本号进行切换,是一个宏函数

    //创建套接字
    SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    //向服务器发起请求
    sockaddr_in sockAddr;
    memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
    sockAddr.sin_family = AF_INET;
    sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    sockAddr.sin_port = htons(18000);
    connect(sock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));
    //接收服务器传回的数据
    char szBuffer[MAXBYTE] = { 0 };
    recv(sock, szBuffer, MAXBYTE, NULL);
    //输出接收到的数据
    printf("Message form server: %s\n", szBuffer);
    system("pause");
    //关闭套接字
    closesocket(sock);
    //终止使用 DLL
    WSACleanup();   
    return 0;
}

循环传输数据
server端

#include 
#include 
#pragma comment (lib, "ws2_32.lib")  //加载 ws2_32.dll
#pragma warning(disable:4996)
#define BUF_SIZE 100
using namespace std;

int main()
{
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);
    SOCKET array_servSock[10] = {};
    //创建套接字
    SOCKET servSock = socket(AF_INET, SOCK_STREAM, 0);  
    //绑定套接字
    sockaddr_in sockAddr;
    memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
    sockAddr.sin_family = PF_INET;  //使用IPv4地址
    sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");  //具体的IP地址
    sockAddr.sin_port = htons(18000);  //端口
    bind(servSock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));
    //进入监听状态
    listen(servSock, 20);
    //接收客户端请求
    SOCKADDR clntAddr;
    int nSize = sizeof(SOCKADDR);
    char buffer[BUF_SIZE] = { 0 };  //缓冲区
    char *str = "Hello World!";
    SOCKET clntSock = accept(servSock, (SOCKADDR*)&clntAddr, &nSize);
    while (1)   // 循环发送数据
    {
        send(clntSock, str, strlen(str) + sizeof(char), NULL);
        memset(buffer, 0, BUF_SIZE);  //重置缓冲区
    }
    closesocket(clntSock);  //关闭套接字
    //关闭套接字
    closesocket(servSock);
    //终止 DLL 的使用
    WSACleanup();
    return 0;
}

client 端

#include 
#include 
#include 
#pragma comment(lib, "ws2_32.lib")  //加载 ws2_32.dll
#pragma warning(disable:4996)
#define BUF_SIZE 100
int main()
{
    //初始化DLL
    WORD myVersionRequest;
    myVersionRequest = MAKEWORD(2, 2);
    WSADATA wsaDate;
    int err;
    err = WSAStartup(myVersionRequest, &wsaDate);
    if (!err)
    {
        printf("已经打开套接字\n");
    }
    else
    {
        printf("未打开套接字\n");
        return 0;
    }
    //向服务器发起请求
    SOCKET sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
    sockaddr_in sockAddr;
    //memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
    sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    sockAddr.sin_family = PF_INET;
    sockAddr.sin_port = htons(18000);
    char bufRecv[BUF_SIZE] = { 0 }; 
    connect(sock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));
    while (1//循环接收数据
    {
        recv(sock, bufRecv, BUF_SIZE, 0);
        //输出接收到的数据
        printf("Message form server: %s\n", bufRecv);
        memset(bufRecv, 0, BUF_SIZE);  //重置缓冲区
    }
    closesocket(sock);  //关闭套接字
    WSACleanup();  //终止使用 DLL
    return 0;
}

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