The libevent-book is awesome, I learn a lot from this: http://www.wangafu.net/~nickm/libevent-book/ The client needs non-blocking libevent dispatch, I should complete it sooner or later. Step of client: 1. make up a new event base. (event_base is used to determine which event is active) 2. setup socket parameter, like ip and port. 3. make up a new bufferevent. (bufferevent is used to holding transport like socket, and read buffer and write buffer. 4. setup callback on bufferevent, so the proper event will trigger proper callback function. 5. connect to server using bufferevent_socket_connect. 6. enable read and write event. 7. run event dispatch to monitor the event happened on evenbase. Step of server: 1. make up a new event base. 2. setup socket parameter. 3. bind to specific socket and setup listener callback. 4. [optional] setup signal event callback. 5. event dispatch on eventbase.