C ++ 높은 동시성 네트워크 아키텍처 및 구현-5 부

목차

끈적 끈적한 패키지 하도급 실현 아이디어

1. 고객 고착 및 하도급 문제 해결

둘째, 서버 고착 및 하도급 문제 해결

셋째, 창 아래 64 개 연결의 한계를 돌파하고 고정밀 타이머 기능 추가

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오늘 작업을 수행하십시오

1. 고객 고착 및 하도급 문제 해결
2. 고객 고착 및 하도급 문제 해결
3. Windows에서 select64 제한 극복
4. 고정밀 타이머 측정 처리 기능 추가

끈적 끈적한 패키지 하도급 실현 아이디어

그림에 표시된 아이디어입니다. 수신 된 데이터를 먼저 커스텀 버퍼에 저장 한 다음 버퍼를 처리하여 고정 및 서브 패키징 문제를 해결합니다.

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1. 고객 고착 및 하도급 문제 해결

클라이언트 코드 :

• EasyTcpClient.hpp

#ifndef _EasyTcpClient_hpp_
#define _EasyTcpClient_hpp_

#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include<windows.h>
#include<Winsock2.h>
#pragma comment(lib,"ws2_32.lib")
#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 "MessageHeader.hpp"

using namespace std;

class EasyTcpClient
{
	SOCKET _sock;
public:
	EasyTcpClient()
	{
		_sock == INVALID_SOCKET;
	}

	virtual ~EasyTcpClient()
	{
		Close();
	}

	//初始化socket
	void InitSocket()
	{
#ifdef _WIN32
		//启动Windows socket 2.x环境
		WORD ver = MAKEWORD(2, 2);
		WSADATA dat;
		WSAStartup(ver, &dat);
#endif
		//1，用Socket API建立建立TCP客户端
		if (_sock == INVALID_SOCKET)
		{
			cout << "_sock=" << _sock << "关闭旧连接" << endl;
			Close();
		}
		_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

		if (_sock == INVALID_SOCKET)
		{
			cout << "建立socket失败" << endl;
		}
		else
		{
			cout << "建立socket成功" << endl;
		}
	}

	//连接服务器
	int Connect(char *ip, unsigned short port)
	{
		if (_sock != INVALID_SOCKET)
		{
			InitSocket();
		}
		//2，连接服务器 connect
		sockaddr_in _sin = {};
		_sin.sin_family = AF_INET;
		_sin.sin_port = htons(4567);

#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)
		{
			cout << "错误，连接Socket失败" << endl;
		}
		else
		{
			cout << "连接Socket成功" << endl;
		}
		return 0;
	}

	//7，关闭套接字closesocket
	void Close()
	{
		if (_sock != INVALID_SOCKET)
		{
#ifdef _WIN32
			closesocket(_sock);
			//清除Windows socket环境
			WSACleanup();
#else
			close(_sock);
#endif
		}
	}

	//处理网络消息
	bool OnRun()
	{
		if (isRun())
		{
			fd_set fdReads;
			FD_ZERO(&fdReads);
			FD_SET(_sock, &fdReads);

			//添加非阻塞
			timeval t = { 1, 0 };

			int ret = select(_sock + 1, &fdReads, 0, 0, NULL);
			if (ret < 0)
			{
				cout << "_sock=" << _sock << " 任务结束1" << endl;
				return false;
			}
			if (FD_ISSET(_sock, &fdReads))
			{
				FD_CLR(_sock, &fdReads);

				if (-1 == RecvData(_sock))
				{
					cout << "_sock=" << _sock << " 任务结束2" << endl;
					return false;
				}
			}
			return true;
		}
		return false;
	}

	//是否工作中
	bool isRun()
	{
		return _sock != INVALID_SOCKET;
	}

//缓冲区最小单元大小
#ifndef RECV_BUFF_SIZE
#define RECV_BUFF_SIZE 10240
#endif

	//接收缓冲区
	char _szRecv[RECV_BUFF_SIZE];
	//第二缓冲区，消息缓冲区
	char _szMsgBuf[RECV_BUFF_SIZE*10];
	//消息缓冲区的数据尾部位置
	int _lastPos = 0;
	//接收数据 处理粘包，拆分包
	int RecvData(SOCKET cSock)
	{
		//接收消息
		int nLen = (int)recv(cSock, _szRecv, RECV_BUFF_SIZE, 0);
		//接收消息为零
		if (nLen <= 0)
		{
			cout << "socket = " << cSock << " 与服务器断开连接，任务结束 " << endl;
			return -1;
		}
		//将收取到的数据拷贝到消息缓冲区
		memcpy(_szMsgBuf+_lastPos, _szRecv, nLen);
		//消息缓冲区的数据尾部后移
		_lastPos += nLen;
		//判断消息缓冲区的数据长度大于消息头DataHeader长度
		while (_lastPos >= sizeof(DataHeader))
		{
			//这个时候就知道当前消息长度
			DataHeader *header = (DataHeader*)_szMsgBuf;
			//判断消息缓冲区的长度大于消息长度
			if (_lastPos >= header->dataLength)
			{
				//消息缓冲区剩余未处理数据的长度
				int nSize = _lastPos - header->dataLength;
				//处理网络消息
				OnNetMsg(header);
				//将消息缓冲区剩余未处理数据前移
				memcpy(_szMsgBuf, _szMsgBuf + header->dataLength, nSize);
				_lastPos = nSize;
			}
			else{
				//消息缓冲区剩余数据不够一条完整消息
				break;
			}
		}
		return 0;
	}

	//响应网络消息
	virtual void OnNetMsg(DataHeader *header)
	{
		switch (header->cmd)
		{
		case CMD_LOGIN_RESULT:
		{
								 LoginResult *login = (LoginResult*)header;
								 cout << "收到服务端消息：CMD_LOGIN_RESULT，数据长度：" << login->dataLength << endl;
		}
			break;
		case CMD_LOGOUT_RESULT:
		{
								  LogoutResult *logout = (LogoutResult*)header;
								  cout <<_sock<< "收到服务端消息：CMD_LOGOUT_RESULT，数据长度：" << logout->dataLength << endl;
		}
			break;
		case CMD_NEW_USER_JOIN:
		{
								  NewUserJoin *userJoin = (NewUserJoin*)header;
								  cout << _sock<< "收到服务端消息：CMD_NEW_USER_JOIN，数据长度：" << userJoin->dataLength << endl;
		}
			break;
		case CMD_ERROR:
		{
								  cout << _sock << "收到服务端消息：CMD_ERROR，数据长度：" << header->dataLength << endl;
		}
			break;
		default:
		{
				   cout << _sock << "收到未定义消息,数据长度为" << header->dataLength << endl;
		}
			break;
		}
	}

	//发送数据
	int SendData(DataHeader *header)
	{
		if (isRun() && header)
		{
			send(_sock, (const char *)header, header->dataLength, 0);
		}
		return SOCKET_ERROR;
	}
};

#endif

• MessageHeader.hpp

enum CMD
{
	CMD_LOGIN,       //登入
	CMD_LOGIN_RESULT,
	CMD_LOGOUT,      //登出
	CMD_LOGOUT_RESULT,
	CMD_NEW_USER_JOIN,      //新的用户加入
	CMD_ERROR,       //错误
};

struct DataHeader
{
	DataHeader()
	{
		dataLength = sizeof(DataHeader);
		cmd = CMD_ERROR;
	}
	short dataLength;
	short cmd;
};

//匹配四个消息结构体
struct Login : public DataHeader
{
	Login()
	{
		dataLength = sizeof(Login);
		cmd = CMD_LOGIN;
	}
	char userName[32];
	char PassWord[32];
	char data[932];
};

struct LoginResult : public DataHeader
{
	LoginResult()
	{
		dataLength = sizeof(LoginResult);
		cmd = CMD_LOGIN_RESULT;
		result = 0;
	}
	int result;
	char data[992];
};

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;
};

• client.cpp

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

bool g_bRun = true;

void cmdThread()
{
	while (1)
	{
		char cmdBuf[256] = {};
		
		cin >> cmdBuf;
		if (strcmp(cmdBuf, "exit") == 0){
			g_bRun = false;
			cout << "退出子线程" << endl;
			return;
		}
		else{
			cout << "不支持的命令" << endl;
		}
	}
}

int main()
{
	const int cCount = 10;
	EasyTcpClient* client[cCount];
	for (int i = 0; i < cCount; i++)
	{
		client[i] = new EasyTcpClient();
		client[i]->Connect((char *)"127.0.0.1", 4567); //192.168.247.128
	}
	//client.InitSocket();  不用定义，在连接时已经封装了定义

	//启动UI线程
	thread t1(cmdThread);         //启动线程函数
	t1.detach();

	Login login;
	strcpy(login.userName, "lyd");
	strcpy(login.PassWord, "lydmm");
	while (g_bRun)
	{
		for (int i = 0; i < cCount; i++)
		{

			//cout << "0" << endl;
			//client[i]->OnRun();
			//cout << "1"<<endl;
			client[i]->SendData(&login);
		}
	}
	for (int i = 0; i < cCount; i++)
	{
		client[i]->Close();
	}
	cout << "已退出" << endl;
	system("pause");
	return 0;
}

---

둘째, 서버 고착 및 하도급 문제 해결

서버 측 코드 :

• EasyTcpServer.hpp

#ifndef _EasyTcpServer_hpp_
#define _EasyTcpServer_hpp_

#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include<windows.h>
#include<Winsock2.h>
#pragma comment(lib,"ws2_32.lib")
#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"MessageHeader.hpp"
#include<vector>
using namespace std;


//缓冲区最小单元大小
#ifndef RECV_BUFF_SIZE
#define RECV_BUFF_SIZE 10240
#endif

class ClientSocket
{
public:
	ClientSocket(SOCKET sockfd = INVALID_SOCKET)
	{
		_sockfd = sockfd;
		memset(_szMsgBuf, 0, sizeof(_szMsgBuf));
		_lastPos = 0;
	}

	SOCKET sockfd()
	{
		return _sockfd;
	}

	char *msgBuf()
	{
		return _szMsgBuf;
	}

	int getLastPos()
	{
		return _lastPos;
	}

	void setLastPos(int pos)
	{
		_lastPos = pos;
	}
private:
	SOCKET _sockfd;
	//第二缓冲区，消息缓冲区
	char _szMsgBuf[RECV_BUFF_SIZE * 10];
	//消息缓冲区的数据尾部位置
	int _lastPos = 0;
};


class EasyTcpServer
{
private:
	SOCKET _sock;
	vector<ClientSocket*> _clients;

public:
	EasyTcpServer()
	{
		_sock = INVALID_SOCKET;
	}

	virtual ~EasyTcpServer()
	{
		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
		//1，用Socket API建立建立TCP客户端
		if (_sock != INVALID_SOCKET)
		{
			cout << "_sock=" << (int)_sock << "关闭旧连接" << endl;
			Close();
		}
		_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

		if (_sock == INVALID_SOCKET)
		{
			cout << "建立socket失败" << endl;
		}
		else
		{
			cout << (int)_sock << " 建立socket成功" << endl;
		}
		return _sock;
	}

	//绑定IP和端口号
	int Bind(const char *ip, unsigned short port)
	{
		//if (_sock != INVALID_SOCKET)
		//{
		//    InitSocket();
		//}
		//2，bind 绑定用于接受客户端连接的网络接口
		sockaddr_in _sin = {};
		_sin.sin_family = AF_INET;
		_sin.sin_port = htons(port);
#ifdef _WIN32
		if (ip){
			_sin.sin_addr.S_un.S_addr = inet_addr(ip);
		}
		else{
			_sin.sin_addr.S_un.S_addr = INADDR_ANY;
		}
#else
		if (ip){
			_sin.sin_addr.s_addr = inet_addr(ip);
		}
		else{
			_sin.sin_addr.s_addr = INADDR_ANY;
		}
#endif


		int ret = ::bind(_sock, (sockaddr*)&_sin, sizeof(_sin));
		if (SOCKET_ERROR == ret)
		{
			cout << (int)_sock << "错误，绑定网络端口失败" << endl;
		}
		else
		{
			cout << "绑定网络端口成功" << port << endl;
		}
		return ret;
	}

	//监听端口号
	int Listen(int n)
	{
		int ret = listen(_sock, n);
		if (SOCKET_ERROR == ret)
		{
			cout << (int)_sock << " 错误，监听网络端口失败" << endl;
		}
		else
		{
			cout << (int)_sock << " 监听网络端口成功" << endl;
		}
		return ret;
	}

	//接受客户端连接
	SOCKET Accept()
	{
		//4，accept 等待客户端连接
		sockaddr_in clientAddr = {};
		int nAddrlen = sizeof(clientAddr);
		SOCKET cSock = INVALID_SOCKET;

#ifdef _WIN32
		cSock = accept(_sock, (sockaddr *)&clientAddr, &nAddrlen);
#else
		cSock = accept(_sock, (sockaddr *)&clientAddr, (socklen_t *)&nAddrlen);
#endif
		if (INVALID_SOCKET == cSock)
		{
			cout << (int)_sock << " 错误，接受到无效的客户端连接" << endl;
		}
		else
		{
			NewUserJoin userJoin;
			SendDataToAll(&userJoin);
			_clients.push_back(new ClientSocket(cSock));
			cout << "新的客户端加入:" << (int)cSock << "        ";
			cout << inet_ntoa(clientAddr.sin_addr) << endl;
		}
		return _sock;
	}

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

			//8，关闭套接字closesocket
			closesocket(_sock);
			//清除Windows socket环境
			WSACleanup();
#else
			for (int n = (int)_clients.size() - 1; n >= 0; n--)
			{
				close(_clients[n]->sockfd());
				delete _clients[n];
			}
			//8，关闭套接字closesocket
			close(_sock);
#endif
			_clients.clear();
		}
	}

	//处理网络消息
	bool OnRun()
	{
		if (isRun())
		{
			//伯克利套接字
			fd_set fdRead;
			fd_set fdWrite;
			fd_set fdExp;

			FD_ZERO(&fdRead);
			FD_ZERO(&fdWrite);
			FD_ZERO(&fdExp);

			FD_SET(_sock, &fdRead);
			FD_SET(_sock, &fdWrite);
			FD_SET(_sock, &fdExp);


			SOCKET maxSock = _sock;
			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();
				}
			}

			//nfds 是一个整数值，是指fd_set集合中所有描述符（socket）的范围，而不是数量
			//即是所有文件描述符最大值+1，在Windows中这个参数可以写0

			//添加非阻塞
			timeval t = { 1, 0 };

			int ret = select(maxSock + 1, &fdRead, &fdWrite, &fdExp, &t);

			if (ret < 0)
			{
				cout << "select任务结束" << endl;
				Close();
				return false;
			}

			if (FD_ISSET(_sock, &fdRead))
			{
				FD_CLR(_sock, &fdRead);
				Accept();
			}
			for (int n = (int)_clients.size() - 1; n >= 0; n--)
			{
				if (FD_ISSET(_clients[n]->sockfd(), &fdRead))
				{
					if (RecvData(_clients[n]) == -1)
					{
						auto iter = _clients.begin();
						if (iter != _clients.end())
						{
							_clients.erase(iter);
							delete _clients[n];
						}
					}
				}
			}
			return true;
		}
		return false;
	}

	//是否工作中
	bool isRun()
	{
		return _sock != INVALID_SOCKET;
	}

	//缓冲区
	char _szRecv[RECV_BUFF_SIZE];// = {};
	//接收数据 处理粘包哦拆分包
	int RecvData(ClientSocket* pClient)
	{
		//5，接受客户端的请求数据
		int nLen = (int)recv(pClient->sockfd(), (char*)&_szRecv, RECV_BUFF_SIZE, 0);
		if (nLen <= 0)
		{
			cout << "客户端已经退出,任务结束" << endl;
			return -1;
		}
		//将收取到的消息拷贝到消息缓冲区
		memcpy(pClient->msgBuf() + pClient->getLastPos(), _szRecv, nLen);
		//消息缓冲区的数据尾部后移
		pClient->setLastPos(pClient->getLastPos() + nLen);

		//判断消息缓冲区的数据长度大于消息头DataHeader长度
		while (pClient->getLastPos() >= sizeof(DataHeader))
		{
			//这个时候就知道当前消息长度
			DataHeader *header = (DataHeader*)pClient->msgBuf();
			//判断消息缓冲区的长度大于消息长度
			if (pClient->getLastPos() >= header->dataLength)
			{
				//消息缓冲区剩余未处理数据的长度
				int nSize = pClient->getLastPos() - header->dataLength;
				//处理网络消息
				OnNetMsg(pClient->sockfd(), header);
				//将消息缓冲区剩余未处理数据前移
				memcpy(pClient->msgBuf(), pClient->msgBuf() + header->dataLength, nSize);
				pClient->setLastPos(nSize);
			}
			else{
				//消息缓冲区剩余数据不够一条完整消息
				break;
			}
		}
		return 0;
	}

	//响应网络消息
	virtual void OnNetMsg(SOCKET _cSock, DataHeader *header)
	{
		switch (header->cmd)
		{
		case CMD_LOGIN:
		{
						  //做数据偏移
						  Login *login = (Login*)header;
						  //cout << "收到命令：CMD_LOGIN,  数据长度：" << login->dataLength;
						  //cout << "  UserName：" << login->userName << "  PassWord：" << login->PassWord << endl;
						  //忽略判断用户名密码是否正确的过程
						  LoginResult ret;
						  //SendData(_cSock, (DataHeader *)&ret);
		}
			break;
		case CMD_LOGOUT:
		{
						   Login *logout = (Login*)header;
						   cout << "收到命令：CMD_LOGIN,  数据长度：" << logout->dataLength;
						   cout << "  UserName：" << logout->userName << endl;
						   //忽略判断用户名密码是否正确的过程
						   LogoutResult ret;
						   SendData(_cSock, (DataHeader *)&ret);
		}
			break;
		default:
		{
				   DataHeader ret;
				   SendData(_cSock, (DataHeader *)&ret);
		}
			break;
		}
	}

	//发送指定Socket数据
	int SendData(SOCKET _cSock, DataHeader *header)
	{
		if (isRun() && header)
		{
			return (int)send(_cSock, (const char *)header, header->dataLength, 0);
		}
		return SOCKET_ERROR;
	}

	//群发消息
	void SendDataToAll(DataHeader *header)
	{
		for (int n = (int)_clients.size() - 1; n >= 0; n--)
		{
			SendData(_clients[n]->sockfd(), header);
		}
	}
};

#endif

• MessageHeader.hpp

enum CMD
{
	CMD_LOGIN,       //登入
	CMD_LOGIN_RESULT,
	CMD_LOGOUT,      //登出
	CMD_LOGOUT_RESULT,
	CMD_NEW_USER_JOIN,      //新的用户加入
	CMD_ERROR,       //错误
};

struct DataHeader
{
	DataHeader()
	{
		dataLength = sizeof(DataHeader);
		cmd = CMD_ERROR;
	}
	short dataLength;
	short cmd;
};

//匹配四个消息结构体
struct Login : public DataHeader
{
	Login()
	{
		dataLength = sizeof(Login);
		cmd = CMD_LOGIN;
	}
	char userName[32];
	char PassWord[32];
	char data[932];
};

struct LoginResult : public DataHeader
{
	LoginResult()
	{
		dataLength = sizeof(LoginResult);
		cmd = CMD_LOGIN_RESULT;
		result = 0;
	}
	int result;
	char data[992];
};

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;
};

• server.cpp

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

bool g_bRun = true;

void cmdThread()
{
	while (1)
	{
		char cmdBuf[256] = {};

		cin >> cmdBuf;
		if (strcmp(cmdBuf, "exit") == 0){
			g_bRun = false;
			cout << "退出子线程" << endl;
			return;
		}
		else{
			cout << "不支持的命令" << endl;
		}
	}
}
int main()
{
	EasyTcpServer server;
	server.InitSocket();
	server.Bind(nullptr, 4567);
	server.Listen(5);

	thread t1(cmdThread);         //启动线程函数
	t1.detach();

	while (g_bRun)
	{
		server.OnRun();
		//cout<<空闲处理其他业务<<endl;
	}
	server.Close();
	cout << "已退出" << endl;
	system("pause");
	return 0;
}

셋째, 창 아래 64 개 연결의 한계를 돌파하고 고정밀 타이머 기능 추가

Windows에서 select64 제한을 돌파하십시오.

#define FD_SETSIZE 1024

클라이언트 코드 :

• EasyTcpClient.hpp

#ifndef _EasyTcpClient_hpp_
#define _EasyTcpClient_hpp_

#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include<windows.h>
#include<Winsock2.h>
#pragma comment(lib,"ws2_32.lib")
#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 "MessageHeader.hpp"

using namespace std;

class EasyTcpClient
{
	SOCKET _sock;
public:
	EasyTcpClient()
	{
		_sock == INVALID_SOCKET;
	}

	virtual ~EasyTcpClient()
	{
		Close();
	}

	//初始化socket
	void InitSocket()
	{
#ifdef _WIN32
		//启动Windows socket 2.x环境
		WORD ver = MAKEWORD(2, 2);
		WSADATA dat;
		WSAStartup(ver, &dat);
#endif
		//1，用Socket API建立建立TCP客户端
		if (_sock == INVALID_SOCKET)
		{
			cout << "_sock=" << _sock << "关闭旧连接" << endl;
			Close();
		}
		_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

		if (_sock == INVALID_SOCKET)
		{
			cout << "建立socket失败" << endl;
		}
		else
		{
			cout << "建立socket成功" << endl;
		}
	}

	//连接服务器
	int Connect(char *ip, unsigned short port)
	{
		if (_sock != INVALID_SOCKET)
		{
			InitSocket();
		}
		//2，连接服务器 connect
		sockaddr_in _sin = {};
		_sin.sin_family = AF_INET;
		_sin.sin_port = htons(4567);

#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)
		{
			cout << "错误，连接Socket失败" << endl;
		}
		else
		{
			cout << _sock << "  连接Socket" << ip << "成功" << endl;
		}
		return 0;
	}

	//7，关闭套接字closesocket
	void Close()
	{
		if (_sock != INVALID_SOCKET)
		{
#ifdef _WIN32
			closesocket(_sock);
			//清除Windows socket环境
			WSACleanup();
#else
			close(_sock);
#endif
		}
	}

	//处理网络消息
	bool OnRun()
	{
		if (isRun())
		{
			fd_set fdReads;
			FD_ZERO(&fdReads);
			FD_SET(_sock, &fdReads);

			//添加非阻塞
			timeval t = { 1, 0 };

			int ret = select(_sock + 1, &fdReads, 0, 0, NULL);
			if (ret < 0)
			{
				cout << "_sock=" << _sock << " 任务结束1" << endl;
				return false;
			}
			if (FD_ISSET(_sock, &fdReads))
			{
				FD_CLR(_sock, &fdReads);

				if (-1 == RecvData(_sock))
				{
					cout << "_sock=" << _sock << " 任务结束2" << endl;
					return false;
				}
			}
			return true;
		}
		return false;
	}

	//是否工作中
	bool isRun()
	{
		return _sock != INVALID_SOCKET;
	}

//缓冲区最小单元大小
#ifndef RECV_BUFF_SIZE
#define RECV_BUFF_SIZE 10240
#endif

	//接收缓冲区
	char _szRecv[RECV_BUFF_SIZE];
	//第二缓冲区，消息缓冲区
	char _szMsgBuf[RECV_BUFF_SIZE*10];
	//消息缓冲区的数据尾部位置
	int _lastPos = 0;
	//接收数据 处理粘包，拆分包
	int RecvData(SOCKET cSock)
	{
		//接收消息
		int nLen = (int)recv(cSock, _szRecv, RECV_BUFF_SIZE, 0);
		//接收消息为零
		if (nLen <= 0)
		{
			cout << "socket = " << cSock << " 与服务器断开连接，任务结束 " << endl;
			return -1;
		}
		//将收取到的数据拷贝到消息缓冲区
		memcpy(_szMsgBuf+_lastPos, _szRecv, nLen);
		//消息缓冲区的数据尾部后移
		_lastPos += nLen;
		//判断消息缓冲区的数据长度大于消息头DataHeader长度
		while (_lastPos >= sizeof(DataHeader))
		{
			//这个时候就知道当前消息长度
			DataHeader *header = (DataHeader*)_szMsgBuf;
			//判断消息缓冲区的长度大于消息长度
			if (_lastPos >= header->dataLength)
			{
				//消息缓冲区剩余未处理数据的长度
				int nSize = _lastPos - header->dataLength;
				//处理网络消息
				OnNetMsg(header);
				//将消息缓冲区剩余未处理数据前移
				memcpy(_szMsgBuf, _szMsgBuf + header->dataLength, nSize);
				_lastPos = nSize;
			}
			else{
				//消息缓冲区剩余数据不够一条完整消息
				break;
			}
		}
		return 0;
	}

	//响应网络消息
	virtual void OnNetMsg(DataHeader *header)
	{
		switch (header->cmd)
		{
		case CMD_LOGIN_RESULT:
		{
								 LoginResult *login = (LoginResult*)header;
								 //cout << "收到服务端消息：CMD_LOGIN_RESULT，数据长度：" << login->dataLength << endl;
		}
			break;
		case CMD_LOGOUT_RESULT:
		{
								  LogoutResult *logout = (LogoutResult*)header;
								  cout <<_sock<< "收到服务端消息：CMD_LOGOUT_RESULT，数据长度：" << logout->dataLength << endl;
		}
			break;
		case CMD_NEW_USER_JOIN:
		{
								  NewUserJoin *userJoin = (NewUserJoin*)header;
								  cout << _sock<< "收到服务端消息：CMD_NEW_USER_JOIN，数据长度：" << userJoin->dataLength << endl;
		}
			break;
		case CMD_ERROR:
		{
								  cout << _sock << "收到服务端消息：CMD_ERROR，数据长度：" << header->dataLength << endl;
		}
			break;
		default:
		{
				   cout << _sock << "收到未定义消息,数据长度为" << header->dataLength << endl;
		}
			break;
		}
	}

	//发送数据
	int SendData(DataHeader *header)
	{
		if (isRun() && header)
		{
			send(_sock, (const char *)header, header->dataLength, 0);
		}
		return SOCKET_ERROR;
	}
};

#endif

• MessageHeader.hpp

enum CMD
{
	CMD_LOGIN,       //登入
	CMD_LOGIN_RESULT,
	CMD_LOGOUT,      //登出
	CMD_LOGOUT_RESULT,
	CMD_NEW_USER_JOIN,      //新的用户加入
	CMD_ERROR,       //错误
};

struct DataHeader
{
	DataHeader()
	{
		dataLength = sizeof(DataHeader);
		cmd = CMD_ERROR;
	}
	short dataLength;
	short cmd;
};

//匹配四个消息结构体
struct Login : public DataHeader
{
	Login()
	{
		dataLength = sizeof(Login);
		cmd = CMD_LOGIN;
	}
	char userName[32];
	char PassWord[32];
	//char data[932];
};

struct LoginResult : public DataHeader
{
	LoginResult()
	{
		dataLength = sizeof(LoginResult);
		cmd = CMD_LOGIN_RESULT;
		result = 0;
	}
	int result;
	//char data[992];
};

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;
};

• client.cpp

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

bool g_bRun = true;

void cmdThread()//(EasyTcpClient* client)
{
	while (1)
	{
		char cmdBuf[256] = {};
		
		//strcpy(cmdBuf,"login");
		cin >> cmdBuf;
		//if (strcmp(cmdBuf, "login") == 0){
		//	//线程thread;
		//	Login login;
		//	strcpy(login.userName, "lyd");
		//	strcpy(login.PassWord, "lydmima");
		//	client->SendData(&login);
		//}
		if (strcmp(cmdBuf, "exit") == 0){
			g_bRun = false;
			cout << "退出子线程" << endl;
			return;
		}
		else{
			cout << "不支持的命令" << endl;
		}
	}
}

int main()
{
	//EasyTcpClient client;
	//client.Connect((char *)"127.0.0.1", 4567);
	//启动UI线程
	//thread t1(cmdThread, &client);         //启动线程函数
	//t1.detach();

	//while (g_bRun)
	//{
		//client.OnRun();
	//}

	//client.Close();

//-----------------------------------------------------------------

	const int cCount = 100;
	EasyTcpClient* client[cCount];
	for (int i = 0; i < cCount; i++)
	{
		if (g_bRun)
		{
			client[i] = new EasyTcpClient();
		}
	}
	for (int i = 0; i < cCount; i++)
	{
		if (g_bRun)
		{
			client[i]->Connect((char *)"127.0.0.1", 4567); //192.168.247.128
		}   
	}

	//启动UI线程
 	thread t1(cmdThread);         //启动线程函数
	t1.detach();

	Login login;
	strcpy(login.userName, "lyd");
	strcpy(login.PassWord, "lydmm");

	while (g_bRun)
	{
		for (int i = 0; i < cCount; i++)
		{
			client[i]->SendData(&login);
			//if (!client[i]->OnRun())
			//{
			//	return 0;
			//}
		}
	}
	for (int i = 0; i < cCount; i++)
	{
		client[i]->Close();
	}
	cout << "已退出" << endl;
	system("pause");
	return 0;
}

서버 측 코드 :

• CELLTimestamp.hpp

#ifndef CELLTimestamp_hpp_
#define CELLTimestamp_hpp_

#pragma once
#include<chrono>
using namespace std::chrono;

class CELLTimestamp
{
public:
	CELLTimestamp()
	{
		update();
	}
	~CELLTimestamp()
	{

	}

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

	//获取当前秒
	long double getElapsedSecond()
	{
		return this->getElapsedTimeInMicroSec() * 0.000001;
	}
	//获取毫秒
	long double getElapsedTimeInMilliSec()
	{
		return this->getElapsedTimeInMicroSec() * 0.001;
	}
	//获取微秒
	long long getElapsedTimeInMicroSec()
	{
		return duration_cast<microseconds>(high_resolution_clock::now() - _begin).count();
	}
protected:
	time_point<high_resolution_clock> _begin;
};

#endif

• EasyTcpServer.hpp

#ifndef _EasyTcpServer_hpp_
#define _EasyTcpServer_hpp_

#ifdef _WIN32
#define FD_SETSIZE 1024               
#define WIN32_LEAN_AND_MEAN
#include<windows.h>
#include<Winsock2.h>
#pragma comment(lib,"ws2_32.lib")
#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"MessageHeader.hpp"
#include<vector>
#include"CELLTimestamp.hpp"
using namespace std;

int num_count = 1;

//缓冲区最小单元大小
#ifndef RECV_BUFF_SIZE
#define RECV_BUFF_SIZE 10240
#endif

class ClientSocket
{
public:
	ClientSocket(SOCKET sockfd = INVALID_SOCKET)
	{
		_sockfd = sockfd;
		memset(_szMsgBuf, 0, sizeof(_szMsgBuf));
		_lastPos = 0;
	}

	SOCKET sockfd()
	{
		return _sockfd;
	}

	char *msgBuf()
	{
		return _szMsgBuf;
	}

	int getLastPos()
	{
		return _lastPos;
	}

	void setLastPos(int pos)
	{
		_lastPos = pos;
	}
private:
	SOCKET _sockfd;
	//第二缓冲区，消息缓冲区
	char _szMsgBuf[RECV_BUFF_SIZE * 10];
	//消息缓冲区的数据尾部位置
	int _lastPos = 0;
};


class EasyTcpServer
{
private:
	SOCKET _sock;
	vector<ClientSocket*> _clients;
	CELLTimestamp _tTime;
	int _recvCount;

public:
	EasyTcpServer()
	{
		_sock = INVALID_SOCKET;
		_recvCount = 0;
	}

	virtual ~EasyTcpServer()
	{
		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
		//1，用Socket API建立建立TCP客户端
		if (_sock != INVALID_SOCKET)
		{
			cout << "_sock=" << (int)_sock << "关闭旧连接" << endl;
			Close();
		}
		_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

		if (_sock == INVALID_SOCKET)
		{
			cout << "建立socket失败" << endl;
		}
		else
		{
			cout << (int)_sock << " 建立socket成功" << endl;
		}
		return _sock;
	}

	//绑定IP和端口号
	int Bind(const char *ip, unsigned short port)
	{
		//if (_sock != INVALID_SOCKET)
		//{
		//    InitSocket();
		//}
		//2，bind 绑定用于接受客户端连接的网络接口
		sockaddr_in _sin = {};
		_sin.sin_family = AF_INET;
		_sin.sin_port = htons(port);
#ifdef _WIN32
		if (ip){
			_sin.sin_addr.S_un.S_addr = inet_addr(ip);
		}
		else{
			_sin.sin_addr.S_un.S_addr = INADDR_ANY;
		}
#else
		if (ip){
			_sin.sin_addr.s_addr = inet_addr(ip);
		}
		else{
			_sin.sin_addr.s_addr = INADDR_ANY;
		}
#endif


		int ret = ::bind(_sock, (sockaddr*)&_sin, sizeof(_sin));
		if (SOCKET_ERROR == ret)
		{
			cout << (int)_sock << "错误，绑定网络端口失败" << endl;
		}
		else
		{
			cout << "绑定网络端口成功" << port << endl;
		}
		return ret;
	}

	//监听端口号
	int Listen(int n)
	{
		int ret = listen(_sock, n);
		if (SOCKET_ERROR == ret)
		{
			cout << (int)_sock << " 错误，监听网络端口失败" << endl;
		}
		else
		{
			cout << (int)_sock << " 监听网络端口成功" << endl;
		}
		return ret;
	}

	//接受客户端连接
	SOCKET Accept()
	{
		//4，accept 等待客户端连接
		sockaddr_in clientAddr = {};
		int nAddrlen = sizeof(clientAddr);
		SOCKET cSock = INVALID_SOCKET;

#ifdef _WIN32
		cSock = accept(_sock, (sockaddr *)&clientAddr, &nAddrlen);
#else
		cSock = accept(_sock, (sockaddr *)&clientAddr, (socklen_t *)&nAddrlen);
#endif
		if (INVALID_SOCKET == cSock)
		{
			cout << (int)_sock << " 错误，接受到无效的客户端连接" << endl;
		}
		else
		{
			NewUserJoin userJoin;
			SendDataToAll(&userJoin);
			_clients.push_back(new ClientSocket(cSock));
			cout <<num_count<< "  新的客户端加入:" << (int)cSock << "        ";
			num_count++;
			cout << inet_ntoa(clientAddr.sin_addr) << endl;
		}
		return _sock;
	}

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

			//8，关闭套接字closesocket
			closesocket(_sock);
			//清除Windows socket环境
			WSACleanup();
#else
			for (int n = (int)_clients.size() - 1; n >= 0; n--)
			{
				close(_clients[n]->sockfd());
				delete _clients[n];
			}
			//8，关闭套接字closesocket
			close(_sock);
#endif
			_clients.clear();
		}
	}

	//处理网络消息
	bool OnRun()
	{
		if (isRun())
		{
			//伯克利套接字
			fd_set fdRead;
			fd_set fdWrite;
			fd_set fdExp;

			FD_ZERO(&fdRead);
			FD_ZERO(&fdWrite);
			FD_ZERO(&fdExp);

			FD_SET(_sock, &fdRead);
			FD_SET(_sock, &fdWrite);
			FD_SET(_sock, &fdExp);


			SOCKET maxSock = _sock;
			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();
				}
			}

			//nfds 是一个整数值，是指fd_set集合中所有描述符（socket）的范围，而不是数量
			//即是所有文件描述符最大值+1，在Windows中这个参数可以写0

			//添加非阻塞
			timeval t = { 1, 0 };

			int ret = select(maxSock + 1, &fdRead, &fdWrite, &fdExp, &t);

			if (ret < 0)
			{
				cout << "select任务结束" << endl;
				Close();
				return false;
			}

			if (FD_ISSET(_sock, &fdRead))
			{
				FD_CLR(_sock, &fdRead);
				Accept();
			}
			for (int n = (int)_clients.size() - 1; n >= 0; n--)
			{
				if (FD_ISSET(_clients[n]->sockfd(), &fdRead))
				{
					if (RecvData(_clients[n]) == -1)
					{
						auto iter = _clients.begin();
						if (iter != _clients.end())
						{
							_clients.erase(iter);
							delete _clients[n];
						}
					}
				}
			}
			return true;
		}
		return false;
	}

	//是否工作中
	bool isRun()
	{
		return _sock != INVALID_SOCKET;
	}

	//缓冲区
	char _szRecv[RECV_BUFF_SIZE];// = {};
	//接收数据 处理粘包哦拆分包
	int RecvData(ClientSocket* pClient)
	{
		//5，接受客户端的请求数据
		int nLen = (int)recv(pClient->sockfd(), (char*)&_szRecv, RECV_BUFF_SIZE, 0);
		if (nLen <= 0)
		{
			cout << "客户端已经退出,任务结束" << endl;
			return -1;
		}
		//将收取到的消息拷贝到消息缓冲区
		memcpy(pClient->msgBuf() + pClient->getLastPos(), _szRecv, nLen);
		//消息缓冲区的数据尾部后移
		pClient->setLastPos(pClient->getLastPos() + nLen);

		//判断消息缓冲区的数据长度大于消息头DataHeader长度
		while (pClient->getLastPos() >= sizeof(DataHeader))
		{
			//这个时候就知道当前消息长度
			DataHeader *header = (DataHeader*)pClient->msgBuf();
			//判断消息缓冲区的长度大于消息长度
			if (pClient->getLastPos() >= header->dataLength)
			{
				//消息缓冲区剩余未处理数据的长度
				int nSize = pClient->getLastPos() - header->dataLength;
				//处理网络消息
				OnNetMsg(pClient->sockfd(), header);
				//将消息缓冲区剩余未处理数据前移
				memcpy(pClient->msgBuf(), pClient->msgBuf() + header->dataLength, nSize);
				pClient->setLastPos(nSize);
			}
			else{
				//消息缓冲区剩余数据不够一条完整消息
				break;
			}
		}
		return 0;
	}

	//响应网络消息
	virtual void OnNetMsg(SOCKET _cSock, DataHeader *header)
	{
		_recvCount++;
		auto t1 = _tTime.getElapsedSecond();
		if (_tTime.getElapsedSecond() >= 1.0)
		{
			cout << "tTime	" << t1 <<"	client	" <<_clients.size()<<"	socket	" << _sock << "	_recvCount	" << _recvCount << endl;
			_recvCount = 0;
			_tTime.update();
		}
		switch (header->cmd)
		{
		case CMD_LOGIN:
		{
						  //做数据偏移
						  Login *login = (Login*)header;
						  //cout << "收到命令：CMD_LOGIN,  数据长度：" << login->dataLength;
						  //cout << "  UserName：" << login->userName << "  PassWord：" << login->PassWord << endl;
						  //忽略判断用户名密码是否正确的过程
						  LoginResult ret;
						  //SendData(_cSock, (DataHeader *)&ret);
		}
			break;
		case CMD_LOGOUT:
		{
						   Login *logout = (Login*)header;
						   cout << "收到命令：CMD_LOGIN,  数据长度：" << logout->dataLength;
						   cout << "  UserName：" << logout->userName << endl;
						   //忽略判断用户名密码是否正确的过程
						   LogoutResult ret;
						   SendData(_cSock, (DataHeader *)&ret);
		}
			break;
		default:
		{
				   DataHeader ret;
				   SendData(_cSock, (DataHeader *)&ret);
		}
			break;
		}
	}

	//发送指定Socket数据
	int SendData(SOCKET _cSock, DataHeader *header)
	{
		if (isRun() && header)
		{
			return (int)send(_cSock, (const char *)header, header->dataLength, 0);
		}
		return SOCKET_ERROR;
	}

	//群发消息
	void SendDataToAll(DataHeader *header)
	{
		for (int n = (int)_clients.size() - 1; n >= 0; n--)
		{
			SendData(_clients[n]->sockfd(), header);
		}
	}
};

#endif

• MessageHeader.hpp

enum CMD
{
	CMD_LOGIN,       //登入
	CMD_LOGIN_RESULT,
	CMD_LOGOUT,      //登出
	CMD_LOGOUT_RESULT,
	CMD_NEW_USER_JOIN,      //新的用户加入
	CMD_ERROR,       //错误
};

struct DataHeader
{
	DataHeader()
	{
		dataLength = sizeof(DataHeader);
		cmd = CMD_ERROR;
	}
	short dataLength;
	short cmd;
};

//匹配四个消息结构体
struct Login : public DataHeader
{
	Login()
	{
		dataLength = sizeof(Login);
		cmd = CMD_LOGIN;
	}
	char userName[32];
	char PassWord[32];
	//char data[932];
};

struct LoginResult : public DataHeader
{
	LoginResult()
	{
		dataLength = sizeof(LoginResult);
		cmd = CMD_LOGIN_RESULT;
		result = 0;
	}
	int result;
	//char data[992];
};

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;
};

• server.cpp

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

int main()
{
	EasyTcpServer server;
	server.InitSocket();
	server.Bind(nullptr, 4567);
	server.Listen(5);

	while (server.isRun())
	{
		server.OnRun();
	}
	server.Close();
	cout << "已退出" << endl;
	system("pause");
	return 0;
}