使用 LibEvent 创建回显服务器代码

在 Ubuntu 的环境上进行编译运行,先要安装 libevent 的库,然后将生成的 软件上传到 阿里云上面,

在阿里云的管理后台打开相应的端口,在客户端使用 网络调试助手 发送数据,成功回显

 代码如下:

#include 
#include 
#include 
#include 
void CliReadCb(struct bufferevent *bev,void *arg)
{
	//将接受到的消息发回去
	char buf[1024];
	int len;
	len=bufferevent_read(bev,buf,sizeof(buf));
	bufferevent_write(bev,buf,len);
}

void CliWriteCb(struct bufferevent *bev,void *arg)
{

}

void CliEventCb(struct bufferevent *bev,short int events,void *arg)
{
	printf("link Event %Xn",events);
	if(events&(BEV_EVENT_EOF|BEV_EVENT_ERROR))
	{
		bufferevent_free(bev);
	}
}

void cb_listener(struct evconnlistener *listener, evutil_socket_t fd, struct sockaddr *addr, int len, void *ptr)
{
	printf("New Clientn");
	struct bufferevent *bev; 
	bev=bufferevent_socket_new(evconnlistener_get_base(listener),fd,BEV_OPT_CLOSE_ON_FREE);
	bufferevent_setcb(bev,CliReadCb,CliWriteCb,CliEventCb,bev);
	bufferevent_enable(bev,EV_READ);
}


int main()
{
	struct event_base *base=event_base_new();
	struct sockaddr_in serverAddr;
	struct evconnlistener* listener;
	serverAddr.sin_family = AF_INET;
	serverAddr.sin_port = htons(9000);
	serverAddr.sin_addr.s_addr = inet_addr("0.0.0.0");
	listener = evconnlistener_new_bind(base, cb_listener, base, LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE, 36, (struct  sockaddr*)&serverAddr, sizeof(serverAddr));	
	printf("Tcp Server is running!n");
	event_base_dispatch(base);
	evconnlistener_free(listener);
	event_base_free(base);
	return (0);
}