将多次收发报文提升位一次性收发Client

#define WIN32_LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS

#include <windows.h>
#include <WinSock2.h>
#include <cstdio>
#include <cstring>

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

enum CMD {
    CMD_LOGIN,
    CMD_LOGIN_RESULT,
    CMD_LOGOUT,
    CMD_LOGOUT_RESULT,
    CMD_ERROR
};

struct DataHeader {
    short dataLength;  // 包体长度
    short cmd;
};

// DataPackage
struct Login : public DataHeader {
    Login() {
        dataLength = sizeof(Login);
        cmd = CMD_LOGIN;
    }
    char userName[32];
    char PassWord[32];
};

struct LoginResult : public DataHeader {
    LoginResult() {
        dataLength = sizeof(LoginResult);
        cmd = CMD_LOGIN_RESULT;
        result = 0;
    }
    int result;
};

struct LogOut : public DataHeader {
    LogOut() {
        dataLength = sizeof(LogOut);
        cmd = CMD_LOGOUT;
    }
    char userName[32];
};

struct LoginOutResult : public DataHeader {
    LoginOutResult() {
        dataLength = sizeof(LoginOutResult);
        cmd = CMD_LOGIN_RESULT;
        result = 0;
    }
    int result;
};
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 = socket(AF_INET, SOCK_STREAM, 0);
    if (sock == INVALID_SOCKET) {
        printf("establish socket failed\n");
    }
    else {
        printf("establish socket success\n");
    }
    // 2 连接服务器
    sockaddr_in _sin = {};
    _sin.sin_family = AF_INET;
    _sin.sin_port = htons(4567);
    _sin.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
    int ret = connect(sock, (sockaddr*)&_sin, sizeof(sockaddr_in));
    if (ret == SOCKET_ERROR) {
        printf("connect failed\n");
    }
    else {
        printf("connect success\n");
    }
    while (true) {
        // 输入请求命令
        char cmdBuf[128] = {};
        scanf_s("%s", cmdBuf , 128);
        // 处理请求
        if (0 == strcmp(cmdBuf, "exit")) {
            printf("recieve exit , mission end\n");
            break;
        }
        else if(0 == strcmp(cmdBuf , "login")){
            // 向服务器发送命令
            Login login;
            strcpy_s(login.userName, "jf");
            strcpy_s(login.PassWord, "jfmm");
            send(sock, (const char*)&login, sizeof(Login), 0);
            // 接收服务器返回的数据
            LoginResult loginRet = {};
            recv(sock, (char*)&loginRet, sizeof(LoginResult), 0);
            printf("LoginResult: %d\n", loginRet.result);
        }
        else if (0 == strcmp(cmdBuf, "logout")) {
            LogOut logout;
            strcpy_s(logout.userName, "jf");
            // 向服务器发送命令
            send(sock, (const char*)&logout, sizeof(logout), 0);
            // 接收服务器返回的数据
            LoginOutResult logoutRet = {};
            recv(sock, (char*)&logoutRet, sizeof(LoginOutResult), 0);
            printf("LoginResult: %d\n", logoutRet.result);
        }
        else {
            printf("Not support Command , please input again\n");
        }
    }
    // 4 关闭套接字
    closesocket(sock);
    WSACleanup();
    printf("exit , mission end\n");
    getchar();
    return 0;
}

简锋/服务器编程

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