proto-debuger/protoDebuger/tcp_server_libevent.cpp

#define _WSPIAPI_H_
#define _WINSOCKAPI_
#include "tcp_server_libevent.h"
#include <cstring>

/**
 * @description: 
 * @param {*}
 * @return {*}
 */
ConnectionLibevent::ConnectionLibevent(TcpServerLibevent *p,struct bufferevent *ev,uint32_t fd,struct sockaddr_in *p1):
m_parent_server(nullptr),
m_event(nullptr),
m_fd(-1),
m_addr(nullptr)
{
	m_parent_server = p;
	m_event = ev;
	m_fd = fd;
	m_addr = p1;
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
ConnectionLibevent::ConnectionLibevent(struct bufferevent *ev,uint32_t fd,struct sockaddr_in *p1):
m_parent_server(nullptr),
m_event(nullptr),
m_fd(-1),
m_addr(nullptr)
{
	m_event = ev;
	m_fd = fd;
	m_addr = p1;
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
ConnectionLibevent* defaultConnAccept(struct bufferevent *ev,uint32_t fd,struct sockaddr_in *p1){
	return new ConnectionLibevent(ev,fd,p1);
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
int ConnectionLibevent::OnRecv(char *p,uint32_t len){
	std::cout<<"OnRecv "<<p<<std::endl;
	m_bytes_recv += len;
	return 0;
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
int ConnectionLibevent::OnClose(){
	std::cout<<"close "<<this->m_fd << " "<<this->IpAddress()<<std::endl;
	return 0;
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
int ConnectionLibevent::OnWrite(){

	return 0;
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
int ConnectionLibevent::WriteData(const char *p,uint16_t len){
	if(nullptr == p){
		return -1;
	}
	return bufferevent_write(this->m_event,p,len);
}

uint32_t ConnectionLibevent::SocketFd(){
	return m_fd;
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
int ConnectionLibevent::SetServer(TcpServerLibevent *p){
	if(nullptr != p){
		this->m_parent_server = p;
		return 0;
	}
	return -1;
}

string ConnectionLibevent::IpAddress(){
	if(nullptr != m_addr){
		return string(inet_ntoa(m_addr->sin_addr));
	}
	return "";
}
TcpServerLibevent *ConnectionLibevent::Server(){
	return m_parent_server;
}

void read_cb(struct bufferevent *bev, void *arg)
{
	char buf[1024] = {0};
    ConnectionLibevent* conn = (ConnectionLibevent*)arg;
	bufferevent_read(bev, buf, sizeof(buf));

	cout << "client " << conn->IpAddress() << " say:" << buf << endl;
	conn->OnRecv(buf,sizeof(buf));
}

void write_cb(struct bufferevent *bev, void *arg)
{
	ConnectionLibevent* conn = (ConnectionLibevent*)arg;
	std::cout<<"connection "<<conn->IpAddress()<<" sended data success"<< std::endl; 
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
void event_cb(struct bufferevent *bev, short events, void *arg)
{
	ConnectionLibevent *conn = (ConnectionLibevent*)(arg);
	TcpServerLibevent *server = conn->Server();
    if (events & BEV_EVENT_EOF)
    {
        cout << "connection closed: " << conn->IpAddress() << " " << conn->SocketFd() << endl;
		conn->OnClose();
		bufferevent_free(bev);
		server->RemoveConnection(conn->SocketFd());
    }
    else if (events & BEV_EVENT_ERROR)
    {
		conn->OnClose();
		bufferevent_free(bev);
		server->RemoveConnection(conn->SocketFd());
        cout << "some other error !" << endl;
    }
	delete conn;
}

/**
 * @description: 
 * @param {*}
 * @return {*}
 */
void cb_listener(struct evconnlistener *listener, evutil_socket_t fd, struct sockaddr *addr, int len, void *ptr) {
	struct sockaddr_in* client = (sockaddr_in*)addr ;
	cout << "connect new client: " << inet_ntoa(client->sin_addr) << " " << fd << " ::"<< ntohs(client->sin_port)<< endl;
	TcpServerLibevent *server = (TcpServerLibevent*)ptr;
    if(server != nullptr){
		struct bufferevent *bev;
		bev = bufferevent_socket_new(server->m_event_base, fd, BEV_OPT_CLOSE_ON_FREE);
		ConnectionLibevent *conn = server->m_handle_accept(bev,ntohs(client->sin_port),client);
		conn->SetServer(server);
		server->AddConnection(ntohs(client->sin_port),conn);
		bufferevent_setcb(bev, read_cb, write_cb, event_cb, conn);
        bufferevent_enable(bev, EV_READ);
	}
}

/**
 * @description: 
 * @param {*}
 * @return {*}
 */
void server_run(TcpServerLibevent *p){
	if(nullptr != p){
        while(p->m_status == TcpServerLibevent::RUNNING){
            int ret =event_base_loop(p->m_event_base,EVLOOP_NONBLOCK);
            if(ret < 0){
                p->m_status = TcpServerLibevent::FAIL;
                break;
            }
		}
	}
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
TcpServerLibevent::SERVER_STATUS TcpServerLibevent::Status(){
	return m_status;
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
int TcpServerLibevent::AddConnection(uint32_t fd,ConnectionLibevent *p){
	if( m_map_client.find(fd) == m_map_client.end()){
		if(nullptr != p)
			m_map_client[fd] = p;
		else
			return -1;
	}
	return 0;
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
int TcpServerLibevent::RemoveConnection(uint32_t fd){
if( m_map_client.find(fd) != m_map_client.end()){
		m_map_client.erase(fd);
		return 0;
	}else{
		return -1;
	}
}
/**
 * @description: 
 * @param {*}
 * @return {*}
 */
int TcpServerLibevent::SetNewConnectionHandle(OnAccept p){
	m_handle_accept = p;
	return 0;
}
/**
 * @description:  
 * @param {int} ports 
 * @param {string} bindip
 * @return {*}
 */
TcpServerLibevent::TcpServerLibevent(int port,string bindip) :
	m_thread(nullptr),
	m_event_base(nullptr),
	m_event_listener(nullptr)
{
	m_handle_accept = defaultConnAccept;
	m_backlog = 10000;
	this->m_bind_ip = bindip;
	this->m_port = port;
	
	memset(&m_server_addr, 0, sizeof(m_server_addr));
	m_server_addr.sin_family = AF_INET;
	m_server_addr.sin_port = htons(port);
	m_server_addr.sin_addr.s_addr = htonl(INADDR_ANY);

	//	创建 event_base
	m_event_base = event_base_new();
	if(NULL == m_event_base){
		return;
	}

	m_event_listener = evconnlistener_new_bind(m_event_base,
		cb_listener,
		this,
        LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE|LEV_OPT_THREADSAFE,
		m_backlog,
		(struct  sockaddr*)&m_server_addr,
		sizeof(m_server_addr));
	if(NULL == m_event_listener)
	{	
		m_status = FAIL;
	}
	m_status = STOP;
}
/**
 * @description:  start server synchronous
 * @param {*}
 * @return {*}
 */
int TcpServerLibevent::StartServerSync(){
	if(m_status == STOP){
		m_status = RUNNING;
        if(-1 == event_base_dispatch(m_event_base)){
            qDebug()<<"error ";
        }
		event_base_free(m_event_base);
		return 0;
	}
	return -1;
}
/**
 * @description: start server asynchronous
 * @param {*}
 * @return {*}
 */
int TcpServerLibevent::StartServerAsync(){
	if(m_status == STOP){
#ifdef WIN32
		evthread_use_windows_threads();
#endif
#ifdef linux
		evthread_use_pthreads();
#endif
        m_status = RUNNING;

        m_thread = new std::thread(server_run,this);
		m_thread->detach();
		return 0;
	}
    return -1;
}

int TcpServerLibevent::StopServer()
{
    struct timeval v;
    v.tv_usec = 1000;
    v.tv_sec = 0;

    if(m_status == RUNNING){
        int ret = event_base_loopexit(m_event_base,&v);
        if (ret < 0){
            // todo write log

        }
        evconnlistener_free(this->m_event_listener);
        if(ret < 0){
            // todo write log
            qDebug()<<"evconnlistener_disable"<<ret;

        }
        m_status = STOP;
        return ret;
    }
    return -1;
}
/**
 * @description: start server asynchronous
 * @param {*}
 * @return {*}
 */
TcpServerLibevent::~TcpServerLibevent(){
	if(this->m_status == RUNNING){
		m_thread->detach();
        struct timeval v;
        v.tv_usec = 1000;
        v.tv_sec = 1;

        int ret = event_base_loopexit(m_event_base,&v);
        this->m_status = STOP;
	}
    if(nullptr != m_event_base){
        event_base_free(m_event_base);
        delete m_event_base;
        m_event_base = nullptr;
    }
    if(nullptr != m_event_listener){
        delete m_event_listener;
        m_event_listener = nullptr;
    }

}