} elsif ($^O eq 'freebsd') {
my $x = getsockopt($s, SOL_SOCKET, SO_ACCEPTFILTER);
return if defined $x; # don't change if set
} elsif ($^O eq 'freebsd') {
my $x = getsockopt($s, SOL_SOCKET, SO_ACCEPTFILTER);
return if defined $x; # don't change if set