/* Extract flow data from 'opi' into 'flow'. */
pkt_ofs = offsetof(struct ofp_packet_in, data);
pkt_len = ntohs(opi->header.length) - pkt_ofs;
/* Extract flow data from 'opi' into 'flow'. */
pkt_ofs = offsetof(struct ofp_packet_in, data);
pkt_len = ntohs(opi->header.length) - pkt_ofs;