+ my ($del, $add) = $parent->diff_nodes(keys %in);
+ if ($del) {
+ foreach my $call (@$del) {
+ next if $call eq $main::mycall;
+ RouteDB::delete($call, $chan_call);
+ my $ref = Route::Node::get($call);
+ if ($ref) {
+ push @pc21, grep {$_} $ref->del($parent);
+ }
+ }
+ }
+ if ($add) {
+ foreach my $call (@$add) {
+ next if $call eq $main::mycall;
+ RouteDB::update($call, $chan_call);
+ my $here = $in{$call};
+ push @pc19, grep {$_} $parent->add($call, 0, $here);
+ }
+ }
+ $thing->{pc21n} = \@pc21 if @pc21;
+ $thing->{pc19n} = \@pc19 if @pc19;
+
+ # now users
+ if ($thing->{u}) {
+ %in = (map {my ($here, $call) = unpack "A1 A*", $_; ($call, $here)} split /:/, $thing->{u});
+ ($del, $add) = $parent->diff_users(keys %in);
+
+ my $call;
+
+ my @pc17;
+ foreach $call (@$del) {
+ RouteDB::delete($call, $chan_call);
+ my $ref = Route::User::get($call);
+ if ($ref) {
+ $parent->del_user($ref);
+ push @pc17, $ref;
+ } else {
+ dbg("Thingy::Rt::lcf: del user $call not known, ignored") if isdbg('chanerr');
+ next;
+ }
+ }
+ if (@pc17) {
+ $thing->{pc17n} = $parent;
+ $thing->{pc17u} = \@pc17;
+ }
+
+ my @pc16;
+ foreach $call (@$add) {
+ RouteDB::update($call, $chan_call);
+ push @pc16, _add_user($parent, $call, $in{$call});
+ }
+ if (@pc16) {
+ $thing->{pc16n} = $parent;
+ $thing->{pc16u} = \@pc16;
+ }
+ }
+