服务端:

//vc的第一套socket,第二套socket,可能存在冲突

#define WIN32_LEAN_AND_MEAN
#define  _WINSOCK_DEPRECATED_NO_WARNINGS //也可以放到工程属性,预处理中

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

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

enum CMD
{
    CMD_LOGIN,
    CMD_LOGOUT,
    CMD_ERROR
};

struct DataHeader 
{
    int dataLength;
    CMD    cmd;
};

struct Login
{
    char userName[32];
    char passWord[32];
};

struct LoginResult
{
    int ret;
};

struct LogOut
{
    char userName[32];
};

struct LogOutResult
{
    int ret;
};


int main()
{
    //启动Windows socket 2.x环境
    WORD ver = MAKEWORD(2, 2);
    WSADATA dat;
    WSAStartup(ver, &dat);

    //--用Socket API建立简易TCP服务端
    //1.建立一个socket
    SOCKET _sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    //2 bind绑定用于接受客户端连接的网络端口
    sockaddr_in _sin = {};
    _sin.sin_family = AF_INET;
    _sin.sin_port = htons(4567);//host to net unsigned
    _sin.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
    //使用127.0.0.1可以防止外网访问
    //启用本机全部的ip地址可以使用,INADDR_ANY
    if (SOCKET_ERROR == bind(_sock, (sockaddr*)&_sin, sizeof(sockaddr_in)))
    {
        printf("错误,绑定网络端口失败...\n");
    }
    else
    {
        printf("绑定网络端口成功...\n");
    }
    //3 listen 监听网络端口
    if (SOCKET_ERROR == listen(_sock, 5))
    {
        printf("错误,监听网络端口失败...\n");
    }
    else
    {
        printf("监听网络端口成功...\n");
    }
    //4 accept等待接受客户端连接
    sockaddr_in clientAddr = {};
    int nAddrLen = sizeof(clientAddr);
    SOCKET _cSock = INVALID_SOCKET;
    

    _cSock = accept(_sock, (sockaddr*)&clientAddr, &nAddrLen);
    if (INVALID_SOCKET == _cSock)
    {
        printf("错误,接受到无效客户端socket...\n");
    }
    printf("新客户端加入:IP=%s\n", inet_ntoa(clientAddr.sin_addr));


    while (true)
    {
        //5 接收客户端数据
        DataHeader header = {};

        int nLen = recv(_cSock, (char*)&header, sizeof(DataHeader), 0);
        if (nLen <= 0)
        {
            printf("客户端已退出,任务结束。\n");
            break;
        }

        switch (header.cmd)
        {
        case CMD_LOGIN:
        {
            Login login = {};
            recv(_cSock, (char*)&login, sizeof(Login), 0);
            printf("logint,user:%s login,password:%s\n", login.userName, login.passWord);
            //----------------------------
            DataHeader header = {};
            header.dataLength = sizeof(LoginResult);
            header.cmd = CMD_LOGIN;
            LoginResult longinRet = {1};
            send(_cSock, (const char*)&header, sizeof(DataHeader), 0);
            send(_cSock, (const char*)&longinRet, sizeof(LoginResult), 0);
        }
        break;
        case CMD_LOGOUT:
        {
            LogOut log_out = {};
            recv(_cSock, (char*)&log_out, sizeof(LogOut), 0);
            printf("logout,user:%s loginout\n", log_out.userName);
            //----------------------------
            //----------------------------
            DataHeader header = {};
            header.dataLength = sizeof(LogOutResult);
            header.cmd = CMD_LOGIN;
            LogOutResult logOutRet = { 1 };
            send(_cSock, (const char*)&header, sizeof(DataHeader), 0);
            send(_cSock, (const char*)&logOutRet, sizeof(LogOutResult), 0);
        }
        break;
        default:
        {
            //-------

            DataHeader header = {};
            header.cmd = CMD_ERROR;
            header.dataLength = 0;
            send(_cSock, (const char*)&header, sizeof(DataHeader), 0);
        }
        break;    
        }

    }

    //6 关闭套接字closesocket
    closesocket(_sock);


    //清除Windows socket环境
    WSACleanup();
    printf("已退出。\n");
    getchar();
    return 0;
}

 

客户端:

#define WIN32_LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS //也可以放到工程属性,预处理中
//#define _CRT_SECURE_NO_WARNINGS

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


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

enum CMD
{
    CMD_LOGIN,
    CMD_LOGOUT,
    CMD_ERROR
};

struct DataHeader
{
    int dataLength;
    CMD    cmd;
};

struct Login
{
    char userName[32];
    char passWord[32];
};

struct LoginResult
{
    int ret;
};

struct LogOut
{
    char userName[32];
};

struct LogOutResult
{
    int ret;
};

int main()
{

    //启动Windows socket 2.x环境
    WORD ver = MAKEWORD(2, 2);
    WSADATA dat;
    WSAStartup(ver, &dat);
    //---------------------------
    //--用Socket API建立简易TCP客户端
    //1 建立一个socket
    SOCKET _sock = INVALID_SOCKET;
    _sock = socket(AF_INET, SOCK_STREAM, 0);
    if (INVALID_SOCKET == _sock)
    {
        printf("错误,建立Socket失败...\n");
    }
    else
    {
        printf("建立Socket成功...\n");
    }
    //2 连接服务器connect
    sockaddr_in _sin = {};
    _sin.sin_family = AF_INET;
    _sin.sin_port = htons(4567);//host to net unsigned
    _sin.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
    int ret = connect(_sock, (sockaddr*)&_sin, sizeof(sockaddr_in));
    if (SOCKET_ERROR == ret)
    {
        printf("错误,连接服务端失败...\n");


        closesocket(_sock);

        //清除Windows socket环境
        WSACleanup();
        printf("已退出。");
        getchar();
        return 0;
    }
    else
    {
        printf("连接服务端成功...\n");
    }

    
    while (true)
    {
        //3输入请求命令
        char cmdBuf[128] = {};
        scanf_s("%s", cmdBuf, 128);
        getchar();
        //4处理请求
        if (0 == strcmp(cmdBuf, "exit"))
        {
            printf("收到exit命令,任务结束。\n");
            break;
        }
        else if(0 == strcmp(cmdBuf, "login"))
        {
            DataHeader header = {};
            header.dataLength = sizeof(Login);
            header.cmd = CMD_LOGIN;

            Login login = { "xx", "xxx" };

            send(_sock, (const char*)&header, sizeof(DataHeader), 0);
            send(_sock, (const char*)&login, sizeof(Login), 0);

            DataHeader ret_header = {};
            LoginResult cmd_ret = {};

            recv(_sock, (char*)&ret_header, sizeof(DataHeader), 0);
            recv(_sock, (char*)&cmd_ret, sizeof(LoginResult), 0);
            printf("Login result:%d\n", cmd_ret.ret);
        }
        else if (0 == strcmp(cmdBuf, "logout"))
        {
            DataHeader header = {};
            header.dataLength = sizeof(Login);
            header.cmd = CMD_LOGOUT;

            LogOut logout = { "xx" };

            send(_sock, (const char*)&header, sizeof(DataHeader), 0);
            send(_sock, (const char*)&logout, sizeof(LogOut), 0);

            DataHeader ret_header = {};
            LogOutResult cmd_ret = {};

            recv(_sock, (char*)&ret_header, sizeof(DataHeader), 0);
            recv(_sock, (char*)&cmd_ret, sizeof(LogOutResult), 0);
            printf("Logout result:%d\n", cmd_ret.ret);
        }
        else
        {
            printf("wrong cmd, please input cmd again.\n");
        }

    }



    //7 关闭套接字closesocket
    closesocket(_sock);

    //清除Windows socket环境
    WSACleanup();
    printf("已退出");
    getchar();
    return 0;
}

 

posted on 2021-01-13 19:13  邶风  阅读(137)  评论(0编辑  收藏  举报