is_maxswin
ips.is_maxswin, ips.is_swinscale,
is->is_maxswin = ntohs(tcp->th_win);
if (is->is_maxswin == 0)
is->is_maxswin = 1;
is->is_maxdwin = is->is_maxswin * 2;
clone->is_maxswin = 1;
clone->is_maxswin = ntohs(tcp->th_win);
if (clone->is_maxswin == 0)
clone->is_maxswin = 1;