_getshort
uint16_t _getshort(const u_char *);
type = _getshort(cp);
class = _getshort(cp);
n = _getshort(cp);
pri = _getshort(cp);
weight = _getshort(cp);
port = _getshort(cp);
type = _getshort(cp);
class = _getshort(cp);
n = _getshort(cp);