TCP_HDRLEN
if (len < hlen + TCP_HDRLEN) {
TCP_HDRLEN, src, dst);
if (len < IP6_HDRLEN + TCP_HDRLEN) {
IP6_HDRLEN, TCP_HDRLEN, fromstr, tostr);
info("TCP %d data %s%s->%s is activity", len - IP6_HDRLEN - TCP_HDRLEN,