func (this *Callback) OnClose(c *gotcp.Conn) {
log.Println("OnClose:", c.GetExtraData())
addr := c.GetExtraData()
this.cm.DelConn(addr)
}
func (this *Callback) OnConnect(c *gotcp.Conn) bool {
addr := c.GetRawConn().RemoteAddr()
c.PutExtraData(addr.String())
//str := addr.String()
/* act on str */
this.cm.AddConn(addr.String(), c)
log.Println("OnConnect:", addr)
return true
}