connect()函数失败，WSAGetLastError返回10061，如何解决？

Question

用socket做了个网络通讯的程序，在同一个电脑上可用，但是把程序放在另一个电脑上时就出现了错误。
（两个电脑都连着我的手机热点）
connect()函数失败，WSAGetLastError返回10061.
请问这是什么引起的？

#define _CRT_SECURE_NO_WARNINGS
#define _WINSOCK_DEPRECATED_NO_WARNINGS

#pragma comment(lib, "Ws2_32.lib")

#include <WinSock2.h>
#include <stdio.h>

#define SERVERPORT 6000    //服务端口号

int main(int argc, char *argv[])
{
    //加载套接字库
    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. */

    //创建套接字
    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");
    }

    //需要连接的服务端套接字结构信息
    SOCKADDR_IN addrServer;
    addrServer.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");//设定服务器的IP地址
    addrServer.sin_family = AF_INET;
    addrServer.sin_port = htons(SERVERPORT);//设定服务器的端口号(使用网络字节序)

    //向服务器发出连接请求
    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");
    }

    //接收数据
    char recvBuf[100] = { 0 };
    recv(sockClient, recvBuf, 100, 0);
    printf("receive data from server side is: %s\n", recvBuf);

    //发送数据
    send(sockClient, "This is a client side!\n", strlen("This is a client side!\n") + 1, 0);

    //关闭套接字
    closesocket(sockClient);

    //终止套接字库的使用
    WSACleanup();

    system("pause");
    return 0;
}
// 引用自https://blog.csdn.net/ccf19881030/article/details/16987819

Answer 1

你的服务器在哪里啊，服务器ip地址怎么可能是127.0.0.1，这个是电脑本机回环网卡地址，只能在本机测试用的，不能跨设备使用。