if (verbosity > 0 && po.packet_len > 0) {
char *packet = ofp_packet_to_string(po.packet, po.packet_len);
ds_put_char(string, '\n');
if (verbosity > 0 && po.packet_len > 0) {
char *packet = ofp_packet_to_string(po.packet, po.packet_len);
ds_put_char(string, '\n');