+ ofpbuf_put_uninit(reply, sizeof *nfs);
+ match_len = nx_put_match(reply, false, &fs->rule, 0, 0);
+ ofpacts_put_openflow10(fs->ofpacts, fs->ofpacts_len, reply);
+
+ nfs = ofpbuf_at_assert(reply, start_ofs, sizeof *nfs);
+ nfs->length = htons(reply->size - start_ofs);