func (s *Server) onConn(c net.Conn) {
conn := s.newClientConn(c)
defer func() {
err := recover()
if err != nil {
const size = 4096
buf := make([]byte, size)
buf = buf[:runtime.Stack(buf, false)]
log.Printf("Error server.onConn remoteAddr:%s, stack:%s", c.RemoteAddr().String(), string(buf))
}
conn.Close()
}()
if allowConnect := conn.IsAllowConnect(); allowConnect == false {
err := mysql.NewError(mysql.ER_ACCESS_DENIED_ERROR, "ip address access denied by mysqlproxy.")
conn.writeError(err)
conn.Close()
return
}
if err := conn.Handshake(); err != nil {
log.Printf("Error server.onConn %s", err.Error())
c.Close()
return
}
conn.Run()
}
func (c *ClientConn) writeError(e error) error {
var m *mysql.SqlError
var ok bool
if m, ok = e.(*mysql.SqlError); !ok {
m = mysql.NewError(mysql.ER_UNKNOWN_ERROR, e.Error())
}
data := make([]byte, 4, 16+len(m.Message))
data = append(data, mysql.ERR_HEADER)
data = append(data, byte(m.Code), byte(m.Code>>8))
if c.capability&mysql.CLIENT_PROTOCOL_41 > 0 {
data = append(data, '#')
data = append(data, m.State...)
}
data = append(data, m.Message...)
return c.writePacket(data)
}