在引入#include <WinSock2.h>之前,定义:
#define FD_SETSIZE 1024
就能实现突破64个socket
客户端---------------:100个tcp的client去连接服务端
DataHeader.hpp
#ifndef _MessageHeader_hpp_ #define _MessageHeader_hpp_ enum CMD { CMD_LOGIN, CMD_LOGIN_RET, CMD_logoUT, CMD_logoUT_RET, CMD_NEW_USER_JOIN, CMD_ERROR }; 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[932]; }; struct LoginResult :public DataHeader { LoginResult() { dataLength = sizeof(LoginResult); cmd = CMD_LOGIN_RET; ret = 1; } int ret; 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_RET; ret = 1; } int ret; }; struct NewUserJoin :public DataHeader { NewUserJoin() { dataLength = sizeof(NewUserJoin); cmd = CMD_NEW_USER_JOIN; sock = -1; } int sock; }; #endif
EasyTcpClient.hpp
#ifndef _EasyTcpClient_hpp_ #define _EasyTcpClient_hpp_ #ifdef _WIN32 #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 <stdio.h> #include "DataHeader.hpp" #define RECV_BUFF_SIZE 10240 class EasyTcpClient { public: EasyTcpClient() { _sock = INVALID_SOCKET; } //虚析构函数 virtual ~EasyTcpClient() { Close(); } //初始化socket void InitSocket() { #ifdef _WIN32 WORD ver = MAKEWORD(2, 2); WSADATA dat; WSAStartup(ver, &dat); #endif // _WIN32 if (_sock != INVALID_SOCKET) { Close(); } _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"); } } int Connect(const char* ip, unsigned short port) { if (INVALID_SOCKET == _sock) { InitSocket(); } 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, (const sockaddr*)&_sin, sizeof(sockaddr_in)); if (SOCKET_ERROR == ret) { printf("错误,连接服务端失败...\n"); } else { printf("连接服务端成功...\n"); } return ret; } bool isRun() { return (_sock != INVALID_SOCKET); } bool onRun() { if (isRun()) { fd_set fdread; FD_ZERO(&fdread); FD_SET(_sock, &fdread); timeval t = { 1, 0 }; int ret = select(_sock + 1, &fdread, 0, 0, &t); if (ret < 0) { Close(); printf("select任务结束1。\n"); return false; } if (FD_ISSET(_sock, &fdread)) { if (-1 == RecvData()) { Close(); printf("select任务结束2。\n"); return false; } } } return false; } //接收数据 处理粘包 拆分包 int RecvData() { int nLen = recv(_sock, _szRecv, RECV_BUFF_SIZE, 0); //printf("nLen=%d\n", nLen); if (nLen <= 0) { printf("服务端%d已退出。\n", _sock); return -1; } //将收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位置后移 _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)) { //这时就可以知道当前消息的长度 DataHeader* header = (DataHeader*)_szMsgBuf; //判断是否可以获取一个完整消息 if (_lastPos >= header->dataLength) { //剩余的未处理消息缓冲区数据的长度 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); //将消息缓冲区的数据尾部位置前移 _lastPos = nSize; } else { //消息缓冲区剩余数据不够一条完整消息 break; } } return 0; } void onNetMsg(DataHeader* pData) { switch (pData->cmd) { case CMD_LOGIN_RET: { LoginResult *pLogin = (LoginResult*)pData; //printf("login result:%d\n", pLogin->ret); } break; case CMD_logoUT_RET: { logoutResult *plogout = (logoutResult*)pData; printf("log out result:%d\n", plogout->ret); } break; case CMD_NEW_USER_JOIN: { NewUserJoin *pMsg = (NewUserJoin*)pData; printf("new user:%d join.\n", pMsg->sock); } break; case CMD_ERROR: { printf("收到服务端消息:CMD_ERROR,数据长度:%d\n", pData->dataLength); } break; default: { printf("收到未定义消息,数据长度:%d\n", pData->dataLength); } } } //发送数据 int SendData(DataHeader* pHeader) { if (isRun() && pHeader) { return send(_sock, (const char*)pHeader, pHeader->dataLength, 0); } return SOCKET_ERROR; } void Close() { if (_sock != INVALID_SOCKET) { #ifdef _WIN32 closesocket(_sock); //清除Windows socket环境 WSACleanup(); #else close(_sock); #endif _sock = INVALID_SOCKET; } } private: SOCKET _sock; //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; }; #endif
main.cpp
#ifdef _WIN32 #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 #pragma comment(lib, "ws2_32.lib") #endif #include <stdio.h> #include <thread> #include "EasyTcpClient.hpp" bool g_bRun = true; void cmdThread() { while (true) { //3输入请求命令 char cmdBuf[128] = {}; scanf("%s", cmdBuf); getchar(); //4处理请求 if (0 == strcmp(cmdBuf, "exit")) { printf("退出cmdThread线程\n"); return; } else { printf("wrong cmd, please input cmd again.\n"); } } } int main() { const int count = 100; EasyTcpClient* client[count]; for (int n=0;n<count;n++) { client[n] = new EasyTcpClient(); client[n]->Connect("192.168.10.157", 4567); } std::thread t(cmdThread); t.detach(); Login login = {}; strcpy(login.userName, "jj"); strcpy(login.passWord, "ww"); while (g_bRun) { for (int n = 0; n < count; n++) { client[n]->SendData(&login); client[n]->onRun(); } } for (int n = 0; n < count; n++) { client[n]->Close(); } for (int n = 0; n < count; n++) { delete client[n]; client[n] = nullptr; } printf("已退出"); getchar(); return 0; }
服务端-----------:
DataHeader.hpp
同客户端
EasyTcpserver.hpp
#ifndef _EasyTcpserver_hpp_ #define _EasyTcpserver_hpp_ #ifdef _WIN32 #define FD_SETSIZE 1024 #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> #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 <stdio.h> #include <vector> #include "DataHeader.hpp" #define RECV_BUFF_SIZE 1024 class ClientSocket { public: ClientSocket(SOCKET sockfd = INVALID_SOCKET) { _sockfd = sockfd; //memset(_szMsgBuf, 0, sizeof(_szMsgBuf)); } SOCKET sockfd() { return _sockfd; } char* msgBuf() { return _szMsgBuf; } int getlastPos() { return _lastPos; } void setlastPos(int pos) { _lastPos = pos; } private: SOCKET _sockfd = INVALID_SOCKET; char _szMsgBuf[RECV_BUFF_SIZE * 10] = {}; int _lastPos = 0; }; class EasyTcpserver { public: EasyTcpserver() { _sock = INVALID_SOCKET; } virtual ~EasyTcpserver() { Close(); } //初始化socket SOCKET InitSocket() { #ifdef _WIN32 WORD ver = MAKEWORD(2, 2); WSADATA dat; WSAStartup(ver, &dat); #endif // _WIN32 if (_sock != INVALID_SOCKET) { Close(); } _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"); } return _sock; } //绑定端口号 int Bind(const char* ip, unsigned short port) { sockaddr_in _sin = {}; _sin.sin_family = AF_INET; _sin.sin_port = htons(4567);//host to net unsigned short //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 #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(sockaddr_in)); if (SOCKET_ERROR == ret) { printf("错误,绑定网络端口失败...\n"); } else { printf("绑定网络端口成功...\n"); } return ret; } //监听端口号 int Listen(int cnt) { int ret = listen(_sock, cnt); if (SOCKET_ERROR == ret) { printf("错误,监听网络端口失败...\n"); } else { printf("监听网络端口成功...\n"); } return ret; } //接收客户端连接 int Accept() { 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) { printf("错误,接受到无效客户端socket...\n"); } else { //NewUserJoin msg; //msg.sock = _cSock; //Send2All(&msg); _clients.push_back(new ClientSocket(_cSock)); printf("新客户端加入:socket=%d,IP=%s,count=%d\n", _cSock, inet_ntoa(clientAddr.sin_addr), _clients.size()); } return _cSock; } //关闭socket void Close() { if (_sock != INVALID_SOCKET) { #ifdef _WIN32 // 关闭套接字 for (size_t n = 0; n<_clients.size(); n++) { closesocket(_clients[n]->sockfd()); delete _clients[n]; } closesocket(_sock); //清除Windows socket环境 WSACleanup(); #else for (size_t n = 0; n<clients.size(); n++) { close(_clients[n]->sockfd()); delete _clients[n]; } close(_sock); #endif _clients.clear(); } } //处理网络消息 bool OnRun() { if (!isRun()) { return false; } 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 (size_t n = 0; n<_clients.size(); n++) { FD_SET(_clients[n]->sockfd(), &fdread); if (maxSock < _clients[n]->sockfd()) { maxSock = _clients[n]->sockfd(); } } timeval t = { 1,0 }; int ret = select(maxSock + 1, &fdread, &fdWrite, &fdExp, &t); if (ret < 0) { printf("select任务结束。\n"); Close(); return false; } if (FD_ISSET(_sock, &fdread)) { FD_CLR(_sock, &fdread);//从集合移除了_sock Accept(); } 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()) { delete _clients[n]; _clients.erase(iter); } } } } return true; } //是否工作中 bool isRun() { return _sock != INVALID_SOCKET; } //接收数据 处理粘包 拆分包 int RecvData(ClientSocket* pClient) { // 接收客户端数据 int nLen = (int)recv(pClient->sockfd(), _szRecv, RECV_BUFF_SIZE, 0); //printf("nLen=%d\n", nLen); if (nLen <= 0) { printf("客户端%d已退出。\n", pClient->sockfd()); return -1; } memcpy(pClient->msgBuf() + pClient->getlastPos(), _szRecv, nLen); //消息缓冲区的数据尾部位置后移 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)) { //这时就可以知道当前消息的长度 DataHeader* header = (DataHeader*)pClient->msgBuf(); //判断是否可以获取一个完整消息 if (pClient->getlastPos() >= header->dataLength) { //剩余的未处理消息缓冲区数据的长度 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); //将消息缓冲区的数据尾部位置前移 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: { Login *pLogin = (Login*)header; //printf("客户端%d,cmd logint,user:%s,password:%s\n", _cSock, pLogin->userName, pLogin->passWord); //---------------------------- //---------------------------- LoginResult longinRet = {}; Send(_cSock, &longinRet); } break; case CMD_logoUT: { logout *plogout = (logout*)header; printf("客户端%d,cmd logout,user:%s\n", _cSock, plogout->userName); //---------------------------- logoutResult logoutRet = {}; Send(_cSock, &logoutRet); } break; default: { DataHeader header = {}; header.cmd = CMD_ERROR; Send(_cSock, &header); } break; } } //指定socket发送数据 int Send(SOCKET _cSock, DataHeader* header) { if (isRun() && header) { return send(_cSock, (const char*)header, header->dataLength, 0); } return SOCKET_ERROR; } void Send2All(DataHeader* header) { if (isRun() && header) { for (int n = (int)_clients.size() - 1; n >= 0; n--) { Send(_clients[n]->sockfd(), header); } } } private: SOCKET _sock; std::vector<ClientSocket*> _clients; char _szRecv[RECV_BUFF_SIZE] = {}; }; #endif
main.cpp
#ifdef _WIN32 #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 #pragma comment(lib, "ws2_32.lib") #endif #include <stdio.h> #include <thread> #include "EasyTcpClient.hpp" bool g_bRun = true; void cmdThread() { while (true) { //3输入请求命令 char cmdBuf[128] = {}; scanf("%s", cmdBuf); getchar(); //4处理请求 if (0 == strcmp(cmdBuf, "exit")) { printf("退出cmdThread线程\n"); return; } else { printf("wrong cmd, please input cmd again.\n"); } } } int main() { const int count = 100; EasyTcpClient* client[count]; for (int n=0;n<count;n++) { client[n] = new EasyTcpClient(); client[n]->Connect("192.168.10.157", 4567); } std::thread t(cmdThread); t.detach(); Login login = {}; strcpy(login.userName, "jj"); strcpy(login.passWord, "ww"); while (g_bRun) { for (int n = 0; n < count; n++) { client[n]->SendData(&login); client[n]->onRun(); } } for (int n = 0; n < count; n++) { client[n]->Close(); } for (int n = 0; n < count; n++) { delete client[n]; client[n] = nullptr; } printf("已退出"); getchar(); return 0; }
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