nfm->command = ofputil_tid_command(fm, protocol);
nfm->cookie = fm->new_cookie;
match_len = nx_put_match(msg, &fm->match, fm->cookie, fm->cookie_mask);
nfm->command = ofputil_tid_command(fm, protocol);
nfm->cookie = fm->new_cookie;
match_len = nx_put_match(msg, &fm->match, fm->cookie, fm->cookie_mask);