in6p_fport
fport = in6p->in6p_fport;
in6p->in6p_fport != uh->uh_sport)
if ((inp->in6p_fport == 0 && !opt_l) ||
(inp->in6p_fport != 0 && !opt_c))
&inp->in6p_faddr, inp->in6p_fport);