标签：clients SOCKET int CMD sock header 服务器 select 客户端

在三的基础上增加多线程，提高了服务器处理客户端数据的能力，客户端尽可能的实现了高并发，此版本只是客户端给服务器发消息，服务器不给客户端回消息。

Server部分：一共4个文件（server.cpp,EasyTcpServer.hpp，MessageHeader.hpp和CELLTimestamp.hpp）

server.cpp：

#include"EasyTcpServer.hpp"
#include<thread>

bool g_bRun = true;
void CmdThread()
{
    while (true)
    {
        char cmdBuf[256] = {};
        //scanf("%s", cmdBuf);

        if (0 == strcmp(cmdBuf, "exit")) {

            g_bRun = false;
            printf("退出cmdThread线程\n");
            break;
        }
        else
            printf("不支持的命令。 \n");
    }
}

int main()
{
    EsayTcpServer server;
    server.initSocket();
    server.Bind(nullptr, 10000);
    server.Listen(5);
    server.Start(4);
    /*std::thread t1(CmdThread);
    t1.detach();*/
    while (g_bRun)
    {
        server.OnRun();
    }
    server.Close();
    printf("已退出\n");

    return 0;
}

View Code

EasyTcpServer.hpp：

#ifndef _EASY_TCP_SERVER_HPP_
#define _EASY_TCP_SERVER_HPP_
#define _AFXDLL
#ifdef _WIN32
    #define FD_SETSIZE      5000
    #include"afx.h"
    #include<windows.h>
    #include "WinSock2.h"
#else
    #include<unistd.h>
    #include<arpa/inet.h>
    #include<string.h>

#define SOCKET int
#define INVALID_SOCKET  (SOCKET)(~0)
#define SOCKET_ERROR            (-1)
#endif
#include<iostream>
#include<vector>
#include<stdlib.h>
#include<thread>
#include<mutex>
#include<atomic>


#include"MessageHeader.hpp"
#include "CELLTimestamp.hpp"


#ifndef RECV_BUFF_SIZE
#define RECV_BUFF_SIZE 10240        //接收缓冲区的大小
#endif

//客户端数据类型
class ClientSocket
{
public:
    ClientSocket(SOCKET sockfd = INVALID_SOCKET)
    {
        _sockfd = sockfd;
        ZeroMemory(_szMsgBuf, 0, sizeof(_szMsgBuf));
        _lastPos = 0;
    }
    ~ClientSocket()
    {
    }


    SOCKET sockfd()
    {
        return _sockfd;
    }

    char * msgBuf()
    {
        return _szMsgBuf;
    }

    int getLastPos()
    {
        return _lastPos;
    }

    void setLastPos(int pos)
    {
        _lastPos = pos;
    }

    //发送数据给指定的socket
    int SendData(DataHeader* header)
    {
        if (header)
            send(_sockfd, (const char*)header, header->dataLength, 0);
        return SOCKET_ERROR;
    }

private:
    SOCKET _sockfd;
    char _szMsgBuf[RECV_BUFF_SIZE * 5];
    //消息缓冲区数据尾部位置
    int _lastPos;
};

//网络事件接口
class INetEvent
{
public:
    //客户端加入事件
    virtual void OnNetJoin(ClientSocket* pClient) = 0;
    //客户端离开事件
    virtual void OnNetLeave(ClientSocket* pClient) = 0;
    //客户端消息事件
    virtual void OnNetMsg(ClientSocket* pClient, DataHeader* header) = 0;
private:

};


class CellServer
{
public:
    
    CellServer(SOCKET sock = INVALID_SOCKET)
    {
        _sock = sock;
        _pThread = nullptr;
        _pNetEvnet = nullptr;
    }
    ~CellServer()
    {
        if (_pThread)
        {
            _pThread = nullptr;
        }
        if (_pNetEvnet)
        {
            _pNetEvnet = nullptr;
        }
        Close();
        _sock = INVALID_SOCKET;
    }

    void setEvnetObj(INetEvent* event)
    {
        _pNetEvnet = event;
    }
    //是否在工作中
    bool isRun()
    {
        return _sock != INVALID_SOCKET;
    }

    bool OnRun()
    {
        while(isRun())
        {
            if (_clientsBuff.size() > 0)
            {
                std::lock_guard<std::mutex> lock(_mutex);
                for (auto pClient : _clientsBuff)
                {
                    _clients.push_back(pClient);
                }
                _clientsBuff.clear();
            }
            if (_clients.empty())
            {
                //等待1毫秒
                std::chrono::milliseconds t(1);
                std::this_thread::sleep_for(t);
                continue;
            }
                
            fd_set fdRead;
            /*fd_set fdWrite;
            fd_set fdExp;*/
            FD_ZERO(&fdRead);
            /*FD_ZERO(&fdWrite);
            FD_ZERO(&fdExp);*/

            //将要监听的socket添加到数组
            //FD_SET(_sock, &fdRead);
            /*FD_SET(_sock, &fdWrite);
            FD_SET(_sock, &fdExp);*/


            //只监视连接的客户端的socket
            
            //每次进来都把所有要监视的socket添加到相应的数组中
            /*for (std::vector<ClientSocket*>::iterator it = _clients.begin(); it != _clients.end(); it++)
            {
                FD_SET((*it)->sockfd(), &fdRead);
                if (maxSock < (*it)->sockfd())
                {
                    maxSock = (*it)->sockfd();
                }
            }*/
            SOCKET maxSock = _clients[0]->sockfd();
            for (int n = (int)_clients.size() - 1; n >= 0; n--)
            {
                FD_SET(_clients[n]->sockfd(), &fdRead);
                if (maxSock < _clients[n]->sockfd())
                {
                    maxSock = _clients[n]->sockfd();
                }
            }

            //开始查询，会清空3个数组所有的socket，然后如果哪个socket有事件发送，则会把此socket放入到数组返回
            //当有客户端连接或者客户端发送消息都会进来
            //timeval time = { 2, 0 };
            /*int select(
            IN int nfds, //windows下无意义，linux有意义IN OUT fd_set* readfds,      //检查可读性
            IN OUT fd_set* writefds,    //检查可写性
            IN OUT fd_set* exceptfds,  //例外数据
            IN const struct timeval* timeout);  //函数的返回时间*/
            int ret = select(maxSock + 1, &fdRead, nullptr, nullptr, nullptr);
            if (ret < 0)
            {
                printf("select任务结束\n");
                Close();
                return false;
            }

            for (int n = (int)_clients.size() - 1; n >= 0; n--)
            {
                if (FD_ISSET(_clients[n]->sockfd(), &fdRead))
                {
                    if (-1 == RecvData(_clients[n]))
                    {
                        auto iter = _clients.begin() + n;
                        if (iter != _clients.end())
                        {
                            if (_pNetEvnet)
                                _pNetEvnet->OnNetLeave(_clients[n]);
                            delete _clients[n];
                            _clients.erase(iter);
                        }
                    }

                }
            }

            /*for (size_t n = 0; n < fdRead.fd_count; n++)
            {
                if (_clients.size()>n)
                {
                    if (FD_ISSET(_clients[n]->sockfd(), &fdRead))
                    if (-1 == RecvData(_clients[n]))
                    {
                        auto iter = _clients.begin() + n;
                        if (iter != _clients.end())
                        {
                            if (_pNetEvnet)
                                _pNetEvnet->OnLeave(_clients[n]);
                            delete _clients[n];
                            _clients.erase(iter);
                        }
                    }
                }
            }*/
        }
    }

    char _szRecv[RECV_BUFF_SIZE] = {};
     //接受数据，处理粘包，拆分包
    int RecvData(ClientSocket* pClient)
    {
        //接受客户端请求数据
        int nLen = (int)recv(pClient->sockfd(), _szRecv, RECV_BUFF_SIZE, 0);
        if (nLen <= 0)
        {
            //printf("客户端<socket=%d>已退出，任务结束\n", pClient->sockfd());
            return -1;
        }
        memcpy(pClient->msgBuf() + pClient->getLastPos(), _szRecv, nLen);
        pClient->setLastPos(pClient->getLastPos() + nLen);
        //判断消息缓冲区的数据长度大于消息头
        while (pClient->getLastPos() >= sizeof(DataHeader))
        {
            DataHeader* header = (DataHeader*)pClient->msgBuf();
            //判断消息缓冲区的数据长度大于消息体
            if (pClient->getLastPos() >= header->dataLength)
            {
                //剩余未处理消息缓冲区数据的长度
                int nSize = pClient->getLastPos() - header->dataLength;
                OnNetMsg(pClient, header);
                //将未处理的数据前移
                memcpy(pClient->msgBuf(), pClient->msgBuf() + header->dataLength, nSize);
                pClient->setLastPos(nSize);
            }
            else
            {
                //剩余数据小于一个消息体的大小
                break;
            }
        }
        return 0;
    }

     //响应网络消息
    virtual void OnNetMsg(ClientSocket* pClient, DataHeader* header)
    {
        _pNetEvnet->OnNetMsg(pClient, header);

        switch (header->cmd)
        {
        case CMD_LOGIN:
        {
                          //Login* login = (Login*)header;
                          ////printf("收到命令  用户名：%s密码%s\n", login->userName, login->PassWord);
                          //LoginResult ret = {};
                          //ret.result = 0;
                          //pClient->SendData(&ret);
        }
        break;
        case CMD_LOGOUT:
        {
                           //Logout* loginOut = (Logout*)header;
                           ////printf("收到命令： 数据长度：%d 用户名：%s密码%s\n", loginOut->dataLength, loginOut->userName);
                           //LogOutResult retOut = {};
                           //retOut.result = 0;

                           //SendData(cSock, &retOut);
        }
        break;
        case CMD_ERROR:
        {
                          printf("<socket = %d>收到服务端消息:CMD_ERROR,数据长度:%d\n", _sock, header->dataLength);
                          
        }
        break;
        default:
        {
                   printf("<socket = %d>收到未定义的消息,数据长度:%d\n", _sock, header->dataLength);
                   
        }
        break;
        }
    }

    //关闭socket
    void Close()
    {
        if (_sock != INVALID_SOCKET) {
#ifdef _WIN32
            for (int n = _clients.size() - 1; n >= 0; n--)
            {
                closesocket(_clients[n]->sockfd());
                if (_clients[n] != NULL)
                {
                    delete _clients[n];
                }
            }
            closesocket(_sock);
#else
            for (int n = _clients.size() - 1; n >= 0; n--)
            {
                close(_clients[n]->sockfd());
                if (_clients[n] != NULL)
                {
                    delete _clients[n];
                }
            }
#endif
            _clients.clear();
        }
    }

    void addClient(ClientSocket* pClient)
    {
        std::lock_guard<std::mutex> lock(_mutex);
        _clientsBuff.push_back(pClient);
    }

    void Start()
    {
        _pThread = new std::thread(std::mem_fun(&CellServer::OnRun), this);
    }

    size_t getClinetCount() 
    {
        return _clients.size() + _clientsBuff.size();
    }

private:
    SOCKET _sock;
    //客户端正式队列
    std::vector<ClientSocket*> _clients;
    //客户端缓冲队列
    std::vector<ClientSocket*> _clientsBuff;
    //缓冲队列的锁
    std::mutex _mutex;
    std::thread* _pThread;
    INetEvent* _pNetEvnet;
public:
};

class EsayTcpServer:public INetEvent
{
public:
    SOCKET _sock;
    std::vector<CellServer*>_cellServers;
    CELLTimestamp _tTime;
    std::atomic_int _recvCount;
    std::atomic_int _clientCount;
    
public:
    EsayTcpServer()
    {
        _sock = INVALID_SOCKET;
        _recvCount = 0;
        _clientCount = 0;
    }
    virtual ~EsayTcpServer()
    {
        Close();
    }

    //初始化Socket
    SOCKET initSocket()
    {
#ifdef _WIN32
        //启动Windows socket 2.x环境
        WORD ver = MAKEWORD(2, 2);
        WSADATA dat;

        WSAStartup(ver, &dat);
#endif
         //建立一个socket
        if (INVALID_SOCKET != _sock)
        {
            printf("<sock=%d>关闭之前的连接...\n", _sock);
            Close();
        }
        _sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

        if (INVALID_SOCKET == _sock)
            printf("错误,创建Socket失败...\n");
        else
            printf("建立Socket成功...\n");
        return _sock;
    }
    //绑定端口
    int Bind(const char *ip, unsigned short port)
    {
        sockaddr_in sin = {};
        sin.sin_family = AF_INET;
        sin.sin_port = htons(port);    //host to net unsigned short

#ifdef _WIN32
        if (ip != NULL)
        {
            sin.sin_addr.S_un.S_addr = inet_addr(ip);
        }
        else
        {
            sin.sin_addr.S_un.S_addr = INADDR_ANY;     //本机上的外网和局域网ip任意一个拿来用 
        }

#else
        if (ip != NULL)
        {
            sin.sin_addr.s_addr = inet_addr(ip);     //本机上的外网和局域网ip任意一个拿来用
        }
        else
        {
            sin.sin_addr.s_addr = INADDR_ANY;     //本机上的外网和局域网ip任意一个拿来用 
        }

#endif
        //2绑定
        if (SOCKET_ERROR == bind(_sock, (sockaddr *)&sin, sizeof(sockaddr_in)))
        {
            TRACE(_T("ERROR:绑定socket失败\n"));
            return 0;
        }
    }
    //监听端口
    int Listen(int n)
    {
        int ret = listen(_sock, n);
        if (SOCKET_ERROR == ret)
        {
            TRACE(_T("ERROR:socket监听失败"));
        }
        else
        {
            printf("监听开始\n");
        }
        return ret;
    }
    //接受客户端连接
    SOCKET Accept()
    {
        //4接收客户端连接
        sockaddr_in clientAddr = {};
        int nAddrLen = sizeof(sockaddr_in);
        SOCKET cSock = INVALID_SOCKET;
        cSock = accept(_sock, (sockaddr*)&clientAddr, &nAddrLen);
        if (INVALID_SOCKET == cSock)
        {
            printf("接收客户端无效\n");
        }
        else
        {
            addClientToSellServer(new ClientSocket(cSock));
            //printf("第<%d>个客户端加入socket = %d,ip:%s\n", _clients.size(), cSock, inet_ntoa(clientAddr.sin_addr));
        }
        return cSock;
    }

    void addClientToSellServer(ClientSocket* pClient)
    {
        //查找客户数量最少的CellServer消息处理对象
        auto pMinServer = _cellServers[0];
        for (auto pCellServer : _cellServers)
        {
            if (pMinServer->getClinetCount() > pCellServer->getClinetCount())
            {
                pMinServer = pCellServer;
            }
        }
        pMinServer->addClient(pClient);
        OnNetJoin(pClient);
    }

    void Start(int nCellServer)
    {
        for (int n = 0; n < nCellServer; n++)
        {
            auto ser = new CellServer(_sock);
            _cellServers.push_back(ser);
            //注册网络事件接受对象
            ser->setEvnetObj(this);
            ser->Start();
        }
    }
    //关闭socket
    void Close()
    {
        if (_sock != INVALID_SOCKET) 
        {
#ifdef _WIN32
            closesocket(_sock);
            WSACleanup();
#else
            close(_sock);    
#endif
        }
    }

    int nCount = 0;
    //处理网络消息
    bool OnRun()
    {
        if (isRun())
        {
            time4msg();
            fd_set fdRead;
            fd_set fdWrite;
            fd_set fdExp;
            FD_ZERO(&fdRead);
            //FD_ZERO(&fdWrite);
            //FD_ZERO(&fdExp);

            //将要监听的socket添加到数组
            FD_SET(_sock, &fdRead);
            //FD_SET(_sock, &fdWrite);
            //FD_SET(_sock, &fdExp);


            //开始查询，会清空3个数组所有的socket，然后如果哪个socket有事件发送，则会把此socket放入到数组返回
            //当有客户端连接或者客户端发送消息都会进来
            timeval time = { 0, 10 };
            /*int select(
            IN int nfds, //windows下无意义，linux有意义IN OUT fd_set* readfds,      //检查可读性
            IN OUT fd_set* writefds,    //检查可写性
            IN OUT fd_set* exceptfds,  //例外数据
            IN const struct timeval* timeout);  //函数的返回时间*/
            int ret = select(_sock + 1, &fdRead, nullptr, nullptr, &time);
            if (ret < 0)
            {
                printf("Accept   select任务结束\n");
                Close();
                return false;
            }
            if (FD_ISSET(_sock, &fdRead))
            {
                FD_CLR(_sock, &fdRead);
                //4接收客户端连接
                Accept();
            }
        }
    }
    //是否在工作中
    bool isRun()
    {
        return _sock != INVALID_SOCKET;
    }
    // 计算收包个数
    virtual void time4msg()
    {
        auto t1 = _tTime.getElapsedSecond();
        if (t1 >= 1.0)
        {
            printf("time = <%lf>, socket<%d>, clients<%d>, recvCount<%d>\n", t1, _sock, _clientCount, (int)(_recvCount / t1));
            _recvCount = 0;
            _tTime.update();
        }
    }

    //只会被一个线程调用，安全
    virtual void OnNetJoin(ClientSocket* pClient)
    {
        _clientCount++;
    }

    //cellServer 4 多个线程调用，不安全,如果只开启1个cellServer就是安全的
    virtual void OnNetLeave(ClientSocket* pClient)
    {
        _clientCount--;
    }

    //cellServer 4 多个线程调用，不安全，如果只开启1个cellServer就是安全的
    virtual void OnNetMsg(ClientSocket* pClient, DataHeader* header)
    {
        _recvCount++;
    }
    
private:

};

#endif

View Code

MessageHeader.hpp：

#ifndef _MessageHeader_hpp_
#define _MessageHeader_hpp_
enum CMD
{
    CMD_LOGIN,
    CMD_LOGIN_RESULT,
    CMD_LOGOUT,
    CMD_LOGOUT_RESULT,
    CMD_NEW_USER_JOIN,
    CMD_ERROR,
};
// 消息头
struct DataHeader
{
    DataHeader()
    {
        dataLength = sizeof(DataHeader);
        cmd = CMD_ERROR;
    }
    short dataLength;
    short cmd;
};
struct Login :public DataHeader
{
    Login()
    {
        dataLength = sizeof(Login);
        cmd = CMD_LOGIN;
    }
    char userName[32];
    char PassWord[32];
    char data[92];
};

struct LoginResult : public DataHeader
{
    LoginResult()
    {
        dataLength = sizeof(LoginResult);
        cmd = CMD_LOGIN_RESULT;
        result = 0;
    }
    char data[92];
    int result;
};

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

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

struct NewUserJoin :public DataHeader
{
    NewUserJoin()
    {
        dataLength = sizeof(NewUserJoin);
        cmd = CMD_NEW_USER_JOIN;
        sock = 0;
    }
    int sock;
};
#endif

View Code

CELLTimestamp.hpp：

#ifndef _CELL_TIMESTAMP_HPP_
#define _CELL_TIMESTAMP_HPP_

#include<chrono>
using namespace std::chrono;
class CELLTimestamp
{
public:
    CELLTimestamp()
    {
        update();
    }
    ~CELLTimestamp()
    {
    }

    void update()
    {
        _begin = high_resolution_clock::now();
    }

    //获取当前秒
    double getElapsedSecond()
    {
        return getElapsedTimeInMicroSec()*0.000001;
    }

    //获取毫秒
    double getElapsedTimeInMilliSec()
    {
        return getElapsedTimeInMicroSec()*0.001;
    }

    //获取微妙
    long long getElapsedTimeInMicroSec()
    {
        return duration_cast<microseconds>(high_resolution_clock::now() - _begin).count();
    }
private:
protected:
    time_point<high_resolution_clock> _begin;

};
#endif

View Code

 

 

Client部分：一共3个文件（Client.cpp，EasyTcpClient.hpp和MessageHeader.hpp）

Client.cpp：

#define _CRT_SECURE_NO_WARNINGS
#include <thread>
#include "EasyTcpClient.hpp"
#include"CELLTimestamp.hpp"
#pragma comment(lib, "ws2_32.lib")

#define CONNECT_COUNT  1

bool g_bRun = true;
//客户端数量
const int cCount = 10000;
//线程数量
const int tCount = 4;

EasyTcpClient* client[cCount];
void cmdThread()
{
    while (true) 
    {
        char cmdBuf[256] = {};
        scanf("%s", cmdBuf);

        if (0 == strcmp(cmdBuf, "exit")) {

            g_bRun = false;
            printf("退出cmdThread线程\n");
            break;
        }
        else
            printf("不支持的命令。 \n");
    }
}

void sendThread(int id)
{
    printf("thread<%d> start\n", id);
    //4个线程 ID:1-4
    int c = cCount / tCount;
    int begin = (id - 1)*c;
    int end = id*c;

    for (size_t i = begin; i < end; i++)
    {
        if (!g_bRun)
        {
            return ;
        }
        client[i] = new EasyTcpClient();
    }
    for (size_t i = begin; i < end; i++)
    {
        if (!g_bRun)
        {
            return ;
        }
        client[i]->Connect("127.0.0.1", 10000);
    }
    printf("thread<%d>, connect<begin>:%d ,<end>:%d\n", id, begin, end);

    std::chrono::milliseconds t(5000);
    std::this_thread::sleep_for(t);


    Login login[10];
    for (int n = 0; n < 20; n++)
    {
        strcpy(login[n].userName, "lyd");
        strcpy(login[n].PassWord, "lydmm");
    }

    /*Login login;
    strcpy(login.userName, "lyd");
    strcpy(login.PassWord, "lydmm");*/
    
    const int nLen = sizeof(login);

    CELLTimestamp _tTime;
    while (g_bRun)
    {
        
        for (size_t i = begin; i < end; i++)
        {
            //client[i]->OnRun();
            client[i]->SendData(login, nLen);
        }
    }
    for (size_t i = begin; i < end; i++)
    {
        client[i]->Close();
        delete client[i];
    }
    printf("thread<%d> exit\n", id);
}

int main()
{
    std::thread t(cmdThread);
    t.detach();   // 线程分离

    //启动发送线程
    for (int n = 0; n < tCount; n++)
    {
        std::thread t1(sendThread, n + 1);
        t1.detach();
    }
    while (g_bRun)
    {
        Sleep(100);
    }
    
    printf("已退出。 \n");
    return 0;
}

View Code

EasyTcpClient.hpp：

#pragma once
#ifdef _WIN32
#include <WinSock2.h>
#include <windows.h>
#include "MessageHeader.hpp"
#include <stdio.h>
#else
#include<unistd.h>
#include<arpa/inet.h>
#include<string.h>
#define SOCKET int
#define INVALID_SOCKET (SOCKET)(~0)
#define SOCKET_ERROR           (-1)
#include <stdio.h>


#endif

#define RECV_BUFF_SIZE   10240

class EasyTcpClient
{
public:
    SOCKET _sock;
    //接受缓冲区
    char _szRecv[RECV_BUFF_SIZE];
    //第二缓冲区，消息缓冲区
    char _szMsgBuf[RECV_BUFF_SIZE * 5];
    //消息缓冲区的大小
    int _lastPos = 0;

    bool _isConnect;
public:
    EasyTcpClient() 
    {
        _sock = INVALID_SOCKET;
    }
    virtual ~EasyTcpClient() 
    {
        Close();
    }
    // 初始化socket

    void initSocket() 
    {
        // 启动Windows socket 2.x环境
#ifdef _WIN32
        WORD ver = MAKEWORD(2, 2);
        WSADATA dat;

        WSAStartup(ver, &dat);
#endif
        //----------------
        // 建立一个socket
        if (INVALID_SOCKET != _sock) 
        {
            printf("<sock=%d>关闭之前的连接...\n", _sock);
            Close();
        }
        _sock = socket(AF_INET, SOCK_STREAM, 0);

        if (INVALID_SOCKET == _sock)
            printf("错误,创建Socket失败...\n");
        //else
            //printf("建立Socket成功...\n");
    }
    // 连接服务器
    int Connect(const char* ip, unsigned short port) 
    {
        if (INVALID_SOCKET == _sock) 
        {
            initSocket();
        }
        // 连接服务器 connect
        sockaddr_in _sin = {};
        _sin.sin_family = AF_INET;
        _sin.sin_port = htons(port);
#ifdef _WIN32
        _sin.sin_addr.S_un.S_addr = inet_addr(ip);
#else
        _sin.sin_addr.s_addr = inet_addr(ip);
#endif
        int ret = connect(_sock, (sockaddr*)&_sin, sizeof(sockaddr_in));
        if (SOCKET_ERROR == ret)
            printf("连接服务器错误...\n");
        /*else
            printf("连接服务器成功...\n");*/
        return ret;
    }
    void Close() 
    {
        if (_sock != INVALID_SOCKET) {
#ifdef _WIN32
            closesocket(_sock);
            WSACleanup();
#else
            close(_sock);
#endif
            _sock = INVALID_SOCKET;
        }
    }
    // 发送数据
    // 接受数据
    // 处理网络消息
    bool OnRun() 
    {
        if (isRun()) 
        {
            fd_set fdReads;
            FD_ZERO(&fdReads);
            FD_SET(_sock, &fdReads);
            timeval t = { 0, 0 };
            int ret = select(_sock + 1, &fdReads, 0, 0, &t);
            if (ret < 0) 
            {
                printf("<socket=%d>select任务结束\n", _sock);
                return false;
            }
            if (FD_ISSET(_sock, &fdReads))
            {
                FD_CLR(_sock, &fdReads);
                if (-1 == RecvData(_sock)) 
                {
                    printf("<socket=%d>select任务结束2\n", _sock);
                    return false;
                }
            }
            return true;
        }
        return false;
    }

    bool isRun() 
    {
        return _sock != INVALID_SOCKET;
    }
    // 接受数据，处理粘包，拆分包
    int RecvData(SOCKET _cSock)
    {
        // 缓冲区
        //ZeroMemory(_szRecv, sizeof(_szRecv));
        int nLen = recv(_cSock, (char*)&_szRecv, RECV_BUFF_SIZE, 0);
        if (nLen > 0)
        {
            memcpy(_szMsgBuf + _lastPos, _szRecv, nLen);
            _lastPos += nLen;
            //判断消息缓冲区的数据长度大于消息头
            while (_lastPos >= sizeof(DataHeader))
            {
                DataHeader* header = (DataHeader*)_szMsgBuf;
                //判断消息缓冲区的数据长度大于消息体
                if (_lastPos >= header->dataLength)
                {
                    //剩余未处理消息缓冲区数据的长度
                    int nSize = _lastPos - header->dataLength;
                    OnNetMsg(header);
                    //将未处理的数据前移
                    memcpy(_szMsgBuf, _szMsgBuf + header->dataLength, nSize);
                    _lastPos = nSize;
                }
                else
                {
                    //剩余数据小于一个消息体的大小
                    break;
                }
            }
        }
        return 0;
    }
    // 响应网络
    void OnNetMsg(DataHeader* header) 
    {
        switch (header->cmd) 
        {
        case CMD_LOGIN_RESULT: 
        {
            LoginResult* login = (LoginResult*)header;
            //printf("收到服务端消息:CMD_LOGIN_RESULT,数据长度:%d\n", header->dataLength);
            break;
        }

        case CMD_LOGOUT_RESULT: 
        {
            LogOutResult* logout = (LogOutResult*)header;
            //printf("收到服务端消息:CMD_LOGOUT_RESULT,数据长度:%d\n", header->dataLength);
            break;
        }

        case CMD_NEW_USER_JOIN: 
        {
            NewUserJoin* userJoin = (NewUserJoin*)header;
            //printf("收到服务端消息:CMD_NEW_USER_JOIN,数据长度:%d\n", header->dataLength);
            break;
        }
        case CMD_ERROR:
        {
            printf("<socket = %d>收到服务端消息:CMD_ERROR,数据长度:%d\n", _sock, header->dataLength);
            break;
        }
        default:
        {
            printf("<socket = %d>收到未定义的消息,数据长度:%d\n", _sock, header->dataLength);
            break;
        }
        }
    }


    void CloseSocket()
    {
        if (_sock != INVALID_SOCKET)
        {
#ifdef _WIN32
            closesocket(_sock);
            WSACleanup();
#else
            close(_sock);
#endif
            _sock = INVALID_SOCKET;
            _isConnect = false;
        }
    }

    // 发送数据
    int SendData(DataHeader* header, int nLen)
    {
        int ret = SOCKET_ERROR;
        if (isRun() && header)
        {
            int ret = send(_sock, (const char*)header, nLen, 0);
            if (ret == SOCKET_ERROR)
            {
                CloseSocket();
                printf("Client:socket<%d>发送数据失败\n", _sock);
            }
            else
                return ret;
        }
        return SOCKET_ERROR;
    }
};

View Code

MessageHeader.hpp：

#ifndef _MessageHeader_hpp_
#define _MessageHeader_hpp_
enum CMD
{
    CMD_LOGIN,
    CMD_LOGIN_RESULT,
    CMD_LOGOUT,
    CMD_LOGOUT_RESULT,
    CMD_NEW_USER_JOIN,
    CMD_ERROR,
};
// 消息头
struct DataHeader
{
    DataHeader()
    {
        dataLength = sizeof(DataHeader);
        cmd = CMD_ERROR;
    }
    short dataLength;
    short cmd;
};
struct Login :public DataHeader
{
    Login()
    {
        dataLength = sizeof(Login);
        cmd = CMD_LOGIN;
    }
    char userName[32];
    char PassWord[32];
    char data[92];
};

struct LoginResult : public DataHeader
{
    LoginResult()
    {
        dataLength = sizeof(LoginResult);
        cmd = CMD_LOGIN_RESULT;
        result = 0;
    }
    char data[92];
    int result;
};

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

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

struct NewUserJoin :public DataHeader
{
    NewUserJoin()
    {
        dataLength = sizeof(NewUserJoin);
        cmd = CMD_NEW_USER_JOIN;
        sock = 0;
    }
    int sock;
};
#endif

View Code

此时，服务器只收客户端的消息，不回消息，1000个客户端，服务器可以每秒处理接近300万个数据包。

 

标签：clients,SOCKET,int,CMD,sock,header,服务器,select,客户端
来源： https://www.cnblogs.com/zwj-199306231519/p/13514761.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。