18.windows使用select突破64个socket
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内容图文
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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