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TCPServer.cpp
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TCPServer.cpp
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#include "TCPServer.h"
#include "VioletError.h"
#include "TCPTransfer.h"
#include "TCPLinkReceiver.h"
#include "VioletLog.h"
#include "VioletTime.h"
#include "OS_Define.h"
#include <time.h>
//TCP连接超时时间
#define MAX_CONNETION_TIMEOUT_VAL 60
TCPServer::TCPServer()
:m_fdCount(0)
,m_nMaxConnectionCount(10)
,m_objListenTCPTransfer(NULL)
{
LOCK_INIT(&m_objLock);
}
TCPServer::~TCPServer()
{
stop();
LOCK_UNINIT(&m_objLock);
}
void TCPServer::setBindAddr(const InetAddr& p_objInetAddr)
{
m_objInetAddr = p_objInetAddr;
}
const InetAddr& TCPServer::getBindAddr()const
{
return m_objInetAddr;
}
void TCPServer::setMaxConnectionCount(const int p_nMaxConnectionCount)
{
m_nMaxConnectionCount = p_nMaxConnectionCount;
}
int TCPServer::getMaxConnectionCount()const
{
return m_nMaxConnectionCount;
}
int TCPServer::start()
{
if (m_bThreadRunFlag)
return VIOLET_SUCCESS;
//1.创建监听传输器
m_objListenTCPTransfer = new TCPTransfer();
struct epoll_event ev;
int nRet = m_objListenTCPTransfer->open();
if (VIOLET_SUCCESS != nRet)
goto fail;
//2.绑定端口
m_objListenTCPTransfer->setRecvBufSize(128*1024);
m_objListenTCPTransfer->setSendBufSize(128*1024);
nRet = m_objListenTCPTransfer->bind(m_objInetAddr);
if (VIOLET_SUCCESS != nRet)
goto fail;
//3.开启监听
nRet = m_objListenTCPTransfer->listen(m_nMaxConnectionCount);
if (VIOLET_SUCCESS != nRet)
goto fail;
//4.创建epoll
m_nEpollFd = epoll_create(EPOLL_SIZE_MAX);
if(m_nEpollFd == -1)
{
nRet = VIOLET_ERROR_SOCKET_EPOLL_CREATE_FAILED;
goto fail;
}
//5.添加监听事件
m_fdCount = 1;
ev.events = EPOLLIN;
ev.data.fd = m_objListenTCPTransfer->getSocket();
nRet = epoll_ctl(m_nEpollFd, EPOLL_CTL_ADD, ev.data.fd, &ev);
if(nRet == -1)
{
nRet = VIOLET_ERROR_SOCKET_EPOLL_CTRL_FAILRD;
goto fail;
}
//6.启动服务线程
m_nServerThreadId = createThread(TCPServerThread, this, &m_bThreadRunFlag);
if( CREATE_THREAD_FAIL == m_nServerThreadId )
{
nRet = VIOLET_ERROR_THREAD_CREATED_FAILED;
goto fail;
}
return VIOLET_SUCCESS;
fail:
if (m_objListenTCPTransfer != NULL)
{
m_objListenTCPTransfer->close();
delete m_objListenTCPTransfer;
m_objListenTCPTransfer = NULL;
}
return nRet;
}
void* TCPServer::TCPServerThread(void *pParam)
{
INFO("TCPServer", "ThreadId=%u", GET_CURRENT_THREADID);
TCPServer *pTCPServer = static_cast<TCPServer*>(pParam);
pTCPServer->run();
return NULL;
}
void TCPServer::stop()
{
//1.停止工作线程
if (m_nServerThreadId != 0)
exitThread(&m_nServerThreadId, &m_bThreadRunFlag);
m_bThreadRunFlag = false;
//2.关闭监听
m_objListenTCPTransfer->close();
delete m_objListenTCPTransfer;
m_objListenTCPTransfer = NULL;
//3.销毁epoll文件描述符
::CLOSESOCKET(m_nEpollFd);
//4.清理连接对象列表
std::list<TCPLinkReceiver*>::iterator it = m_objTCPLinkReceiverList.begin();
for (; it != m_objTCPLinkReceiverList.end(); ++it)
{
TCPLinkReceiver* pobjTCPLinkReceiver = *it;
if (NULL != pobjTCPLinkReceiver)
delete pobjTCPLinkReceiver;
}
m_objTCPLinkReceiverList.clear();
}
int TCPServer::run()
{
int nInterval = 0;
while (m_bThreadRunFlag)
{
//1.epoll接收新连接,处理注册事件业务请求
if (epoll() != VIOLET_SUCCESS)
nInterval += 5000;
else
nInterval += 10;
//2.清理超时连接,利用其epoll的超时时间作为参考,间隔约为30s
if (nInterval > 30000)
{
clearTimeOutConnection();
nInterval= 0;
}
OS_Sleep(2);
}
return VIOLET_SUCCESS;
}
int TCPServer::clearTimeOutConnection()
{
unsigned long dwNow = VIOLETTime::RealSeconds();
std::list<TCPLinkReceiver*>::iterator it = m_objTCPLinkReceiverList.begin();
for (; it != m_objTCPLinkReceiverList.end(); )
{
TCPLinkReceiver* pobjTCPLinkReceiver = *it;
if (dwNow - pobjTCPLinkReceiver->getLastActiveTime() > MAX_CONNETION_TIMEOUT_VAL)
{
closeConnection(pobjTCPLinkReceiver);
it = m_objTCPLinkReceiverList.erase(it);
continue;
}
++it;
}
return VIOLET_SUCCESS;
}
int TCPServer::epoll()
{
//1.epoll_wait
int nfds = epoll_wait(m_nEpollFd, m_events, m_fdCount, 5000);
if(nfds == -1)
{
ERROR("TCPServer", "epoll wait error:%s epool_fd:%d fd_count:%d", strerror(GET_LAST_ERROR), m_nEpollFd, m_fdCount);
return VIOLET_ERROR_SOCKET_EPOLL_WAIT_FAILED;
}
else if(nfds == 0)
{
VDEBUG("TCPServer", "epoll wait timeout.");
return VIOLET_ERROR_SOCKET_EPOLL_TIMEOUT;
}
//2.处理注册事件
for(int i = 0; i < nfds; i++)
{
//2.1 监听事件发生意味新的连接到来
if(m_events[i].data.fd == m_objListenTCPTransfer->getSocket())
{
INFO("TCPServer", "server handle.");
int nRet = handleAccept();
if(nRet != 0)
{
ERROR("TCPServer", "tcp new connection failure.");
continue;
}
}
else
{
//2.2 客户端连接产生事件
int nRet = handleEvent((TCPLinkReceiver *)m_events[i].data.ptr, &m_events[i]);
if (VIOLET_ERROR_SOCKET_SEND_FAILED == nRet || VIOLET_ERROR_SOCKET_RECV_FAILED == nRet)
{
closeConnection((TCPLinkReceiver *)m_events[i].data.ptr);
}
}
}
return VIOLET_SUCCESS;
}
int TCPServer::handleAccept()
{
//1.accept
ITransfer* pobjTransfer = NULL;
int nRet = m_objListenTCPTransfer->accept(pobjTransfer);
if(nRet != VIOLET_SUCCESS)
return nRet;
//2.向下转型为子类
TCPTransfer* pobjTCPTransfer = dynamic_cast<TCPTransfer*>(pobjTransfer);
if (pobjTCPTransfer == NULL)
{
pobjTransfer->close();
return VIOLET_ERROR_NULL_POINTER;
}
//3.设置激活时间
TCPLinkReceiver* pobjTCPLinkReceiver = creatTCPLinkReceiver();
pobjTCPLinkReceiver->setTCPTransfer(pobjTCPTransfer);
pobjTCPLinkReceiver->setLastActiveTime(VIOLETTime::RealSeconds());
//4.初始化监听事件,当前仅注册可读
struct epoll_event ev;
ev.events = EPOLLIN | EPOLLERR | EPOLLHUP | EPOLLPRI;
ev.data.ptr = (void*)pobjTCPLinkReceiver;
//5.添加监听事件
nRet = epoll_ctl(m_nEpollFd, EPOLL_CTL_ADD, pobjTCPTransfer->getSocket(), &ev);
if(nRet == -1)
{
pobjTCPTransfer->close();
delete pobjTCPLinkReceiver;
delete pobjTCPTransfer;
ERROR("VAPSessionManager", "epoll ctl error:%s epool:%d", strerror(errno), m_nEpollFd);
return VIOLET_ERROR_SOCKET_EPOLL_CTRL_FAILRD;
}
//6.追加到管理列表
m_objTCPLinkReceiverList.push_back(pobjTCPLinkReceiver);
m_fdCount++;
return VIOLET_SUCCESS;
}
int TCPServer::addPassiveTCPTransfer(TCPTransfer* pobjTCPTransfer)
{
if (pobjTCPTransfer == NULL)
return VIOLET_ERROR_NULL_POINTER;
//1.创建TCP链路对象
TCPLinkReceiver* pobjTCPLinkReceiver = creatTCPLinkReceiver();
pobjTCPLinkReceiver->setTCPTransfer(pobjTCPTransfer);
pobjTCPLinkReceiver->setLastActiveTime(VIOLETTime::RealSeconds());
//2.创建监听事件
struct epoll_event ev;
ev.events = EPOLLIN | EPOLLERR | EPOLLHUP | EPOLLPRI;
ev.data.ptr = (void*)pobjTCPLinkReceiver;
//3.添加事件
int nRet = epoll_ctl(m_nEpollFd, EPOLL_CTL_ADD, pobjTCPTransfer->getSocket(), &ev);
if(nRet == -1)
{
pobjTCPTransfer->close();
delete pobjTCPLinkReceiver;
delete pobjTCPTransfer;
ERROR("TCPServer", "epoll ctl error:%s epool:%d", strerror(errno), m_nEpollFd);
return VIOLET_ERROR_SOCKET_EPOLL_CTRL_FAILRD;
}
//4.加入到管理列表
m_objTCPLinkReceiverList.push_back(pobjTCPLinkReceiver);
m_fdCount++;
INFO("TCPServer", "addPassiveTCPTransfer done");
return VIOLET_SUCCESS;
}
int TCPServer::handleEvent(TCPLinkReceiver* p_pobjTCPLinkReceiver, struct epoll_event *ev)
{
if (p_pobjTCPLinkReceiver == NULL)
return VIOLET_ERROR_NULL_POINTER;
//1.事件分类处理
int nNetWorkEventType = 0;
if (ev->events & EPOLLIN)
{
nNetWorkEventType = ITransfer::READ;
p_pobjTCPLinkReceiver->setLastActiveTime(VIOLETTime::RealSeconds());
}
else if (ev->events & EPOLLOUT)
{
nNetWorkEventType = ITransfer::WRITE;
}
else if (ev->events & EPOLLPRI)
{
nNetWorkEventType = ITransfer::ERROR;
ERROR("TCPServer", "handleEvent EPOLLPRI Event");
}
else if (ev->events & EPOLLERR)
{
nNetWorkEventType = ITransfer::ERROR;
ERROR("TCPServer", "handleEvent EPOLLERR Event");
}
else if (ev->events & EPOLLHUP)
{
nNetWorkEventType = ITransfer::ERROR;
ERROR("TCPServer", "handleEvent EPOLLHUP Event");
}
else
{
ERROR("TCPServer", "handleEvent UnKnown Event");
return VIOLET_ERROR_BAD_PARAM;
}
//2.具体处理交于实现者处理
return p_pobjTCPLinkReceiver->handleEvent(nNetWorkEventType);
}
int TCPServer::closeConnection(TCPLinkReceiver* p_pobjTCPLinkReceiver)
{
if (p_pobjTCPLinkReceiver == NULL)
return VIOLET_ERROR_NULL_POINTER;
TCPTransfer* pobjTCPTransfer = p_pobjTCPLinkReceiver->getTCPTransfer();
SOCKET sock = pobjTCPTransfer->getSocket();
//1.从监听事件列表移除
int nRet = epoll_ctl(m_nEpollFd, EPOLL_CTL_DEL, sock, NULL);
if(nRet == -1)
{
ERROR("TCPServer", "epoll ctl sock:%d error:%s.", sock, strerror(errno));
}
else
{
m_fdCount--;
}
//2.关闭链接
pobjTCPTransfer->close();
ERROR("TCPServer", "TCPTransfer->close:%p.", pobjTCPTransfer);
return VIOLET_SUCCESS;
}