reduce the number of duplicate PC92 for Ext Nodes
[spider.git] / perl / DXProtHandle.pm
index b5a8bcdcda89c0a085b9c21452cc012140f245d2..4d69b1aa872b4cadb45feb6786091d5721faea4e 100644 (file)
@@ -4,7 +4,7 @@
 #
 # Copyright (c) 1998-2006 Dirk Koopman G1TLH
 #
-# $Id$
+#
 #
 
 package DXProt;
@@ -41,13 +41,18 @@ use vars qw($pc11_max_age $pc23_max_age $last_pc50 $eph_restime $eph_info_restim
                        $last_hour $last10 %eph  %pings %rcmds $ann_to_talk
                        $pingint $obscount %pc19list $chatdupeage $chatimportfn
                        $investigation_int $pc19_version $myprot_version
-                       %nodehops $baddx $badspotter $badnode $censorpc $rspfcheck
+                       %nodehops $baddx $badspotter $badnode $censorpc
                        $allowzero $decode_dk0wcy $send_opernam @checklist
                        $eph_pc15_restime $pc9x_past_age $pc9x_future_age
+                       $pc10_dupe_age $pc92_slug_changes $last_pc92_slug
                   );
 
-$pc9x_past_age = 15*60;                        # maximum age in the past of a px9x
+$pc9x_past_age = 62*60;                        # maximum age in the past of a px9x (a config record might be the only
+                                                               # thing a node might send - once an hour)
 $pc9x_future_age = 5*60;               # maximum age in the future ditto
+$pc10_dupe_age = 45;                   # just something to catch duplicate PC10->PC93 conversions
+$pc92_slug_changes = 60;               # slug any changes going outward for this long
+$last_pc92_slug = 0;                   # the last time we sent out any delayed add or del PC92s
 
 # incoming talk commands
 sub handle_10
@@ -57,8 +62,10 @@ sub handle_10
        my $line = shift;
        my $origin = shift;
 
-       # rsfp check
-       return if $rspfcheck and !$self->rspfcheck(0, $_[6], $_[1]);
+       # this is to catch loops caused by bad software ...
+       if (eph_dup($line, $pc10_dupe_age)) {
+               return;
+       }
 
        # will we allow it at all?
        if ($censorpc) {
@@ -105,42 +112,8 @@ sub handle_10
        RouteDB::update($_[6], $self->{call});
 #      RouteDB::update($to, $_[6]);
 
-       # convert this to a PC93 and process it as such
-       $self->normal(pc93($to, $from, $via, $_[3], $_[6]));
-       return;
-
-       # this is all redundant but kept for now for reference
-
-       # it is here and logged on
-       $dxchan = DXChannel::get($main::myalias) if $to eq $main::mycall;
-       $dxchan = DXChannel::get($to) unless $dxchan;
-       if ($dxchan && $dxchan->is_user) {
-               $_[3] =~ s/\%5E/^/g;
-               $dxchan->talk($from, $to, $via, $_[3]);
-               return;
-       }
-
-       # is it elsewhere, visible on the cluster via the to address?
-       # note: this discards the via unless the to address is on
-       # the via address
-       my ($ref, $vref);
-       if ($ref = Route::get($to)) {
-               $vref = Route::Node::get($via) if $via;
-               $vref = undef unless $vref && grep $to eq $_, $vref->users;
-               $ref->dxchan->talk($from, $to, $vref ? $via : undef, $_[3], $_[6]);
-               return;
-       }
-
-       # can we see an interface to send it down?
-
-       # not visible here, send a message of condolence
-       $vref = undef;
-       $ref = Route::get($from);
-       $vref = $ref = Route::Node::get($_[6]) unless $ref;
-       if ($ref) {
-               $dxchan = $ref->dxchan;
-               $dxchan->talk($main::mycall, $from, $vref ? $vref->call : undef, $dxchan->msg('talknh', $to) );
-       }
+       # convert this to a PC93, coming from mycall with origin set and process it as such
+       $main::me->normal(pc93($to, $from, $via, $_[3], $_[6]));
 }
 
 # DX Spot handling
@@ -159,9 +132,6 @@ sub handle_11
                }
        }
 
-       # rsfp check
-       #                       return if $rspfcheck and !$self->rspfcheck(1, $_[7], $_[6]);
-
        # is the spotted callsign blank? This should really be trapped earlier but it
        # could break other protocol sentences. Also check for lower case characters.
        if ($_[2] =~ /^\s*$/) {
@@ -319,8 +289,6 @@ sub handle_12
        my $line = shift;
        my $origin = shift;
 
-       #                       return if $rspfcheck and !$self->rspfcheck(1, $_[5], $_[1]);
-
        # announce duplicate checking
        $_[3] =~ s/^\s+//;                      # remove leading blanks
 
@@ -393,7 +361,7 @@ sub handle_15
        my $origin = shift;
 
        if (eph_dup($line, $eph_pc15_restime)) {
-               dbg("PCPROT: Ephemeral dup, dropped") if isdbg('chanerr');
+               return;
        } else {
                unless ($self->{isolate}) {
                        DXChannel::broadcast_nodes($line, $self) if $line =~ /\^H\d+\^?~?$/; # send it to everyone but me
@@ -435,7 +403,12 @@ sub handle_16
        }
 
        if (eph_dup($line)) {
-               dbg("PCPROT: dup PC16 detected") if isdbg('chanerr');
+               return;
+       }
+
+       # isolate now means only accept stuff from this call only
+       if ($self->{isolate} && $ncall ne $self->{call}) {
+               dbg("PCPROT: $self->{call} isolated, $ncall ignored") if isdbg('chanerr');
                return;
        }
 
@@ -495,18 +468,17 @@ sub handle_16
                        push @rout, @ans if $h && @ans;
                }
 
-               # send info to all logged in thingies
-               $self->tell_login('loginu', "$ncall: $call") if DXUser->get_current($ncall)->is_local_node;
-               $self->tell_buddies('loginb', $call, $ncall);
-
                # add this station to the user database, if required
-#              $call =~ s/-\d+$//o;    # remove ssid for users
-               my $user = DXUser->get_current($call);
-               $user = DXUser->new($call) if !$user;
+               my $user = DXUser->get_current($ncall);
+               $user = DXUser->new($call) unless $user;
                $user->homenode($parent->call) if !$user->homenode;
                $user->node($parent->call);
                $user->lastin($main::systime) unless DXChannel::get($call);
                $user->put;
+
+               # send info to all logged in thingies
+               $self->tell_login('loginu', "$ncall: $call") if $user->is_local_node;
+               $self->tell_buddies('loginb', $call, $ncall);
        }
        if (@rout) {
                $self->route_pc16($origin, $line, $parent, @rout) if @rout;
@@ -538,6 +510,12 @@ sub handle_17
                return;
        }
 
+       # isolate now means only accept stuff from this call only
+       if ($self->{isolate} && $ncall ne $self->{call}) {
+               dbg("PCPROT: $self->{call} isolated, $ncall ignored") if isdbg('chanerr');
+               return;
+       }
+
        RouteDB::delete($ncall, $self->{call});
 
        my $uref = Route::User::get($ucall);
@@ -574,11 +552,11 @@ sub handle_17
        $parent->del_user($uref);
 
        # send info to all logged in thingies
-       $self->tell_login('logoutu', "$ncall: $ucall") if DXUser->get_current($ncall)->is_local_node;
+       my $user = DXUser->get_current($ncall);
+       $self->tell_login('logoutu', "$ncall: $ucall") if $user && $user->is_local_node;
        $self->tell_buddies('logoutb', $ucall, $ncall);
 
        if (eph_dup($line)) {
-               dbg("PCPROT: dup PC17 detected") if isdbg('chanerr');
                return;
        }
 
@@ -598,29 +576,40 @@ sub handle_18
        my $parent = Route::Node::get($self->{call});
 
        # record the type and version offered
-       if ($_[1] =~ /DXSpider Version: (\d+\.\d+) Build: (\d+(?:\.\d+)?)/) {
-               $self->{version} = 53 + $1;
-               $self->user->version(53 + $1);
-               $parent->version(0 + $1);
-               $self->{build} = 0 + $2;
-               $self->user->build(0 + $2);
-               $parent->build(0 + $2);
+       if (my ($version) = $_[1] =~ /DXSpider Version: (\d+\.\d+)/) {
+               $self->{version} = 53 + $version;
+               $self->user->version(53 + $version);
+               $parent->version(0 + $version);
+               my ($build) = $_[1] =~ /Build: (\d+(?:\.\d+)?)/;
+               $self->{build} = 0 + $build;
+               $self->user->build(0 + $build);
+               $parent->build(0 + $build);
+               dbg("DXSpider version $version build $build");
                unless ($self->is_spider) {
+                       dbg("Change U " . $self->user->sort . " C $self->{sort} -> S");
                        $self->user->sort('S');
                        $self->user->put;
                        $self->sort('S');
                }
-               $self->{handle_xml}++ if DXXml::available() && $_[1] =~ /\bxml/;
-               if ($_[1] =~ /\bpc9x/) {
-                       $self->{do_pc9x} = 1;
-                       dbg("Do px9x set on $self->{call}");
-               }
+#              $self->{handle_xml}++ if DXXml::available() && $_[1] =~ /\bxml/;
        } else {
+               dbg("Unknown software");
                $self->version(50.0);
                $self->version($_[2] / 100) if $_[2] && $_[2] =~ /^\d+$/;
                $self->user->version($self->version);
        }
 
+       if ($_[1] =~ /\bpc9x/) {
+               if ($self->{isolate}) {
+                       dbg("pc9x recognised, but $self->{call} is isolated, using old protocol");
+               } elsif (!$self->user->wantpc9x) {
+                       dbg("pc9x explicitly switched off on $self->{call}, using old protocol");
+               } else {
+                       $self->{do_pc9x} = 1;
+                       dbg("Do px9x set on $self->{call}");
+               }
+       }
+
        # first clear out any nodes on this dxchannel
        my @rout = $parent->del_nodes;
        $self->route_pc21($origin, $line, @rout, $parent) if @rout;
@@ -709,6 +698,12 @@ sub handle_19
                        }
                }
 
+               # isolate now means only accept stuff from this call only
+               if ($self->{isolate} && $call ne $self->{call}) {
+                       dbg("PCPROT: $self->{call} isolated, $call ignored") if isdbg('chanerr');
+                       next;
+               }
+
                my $user = check_add_node($call);
 
 #              if (eph_dup($genline)) {
@@ -773,7 +768,7 @@ sub handle_19
 #              $self->route_pc21($self->{call}, $line, @rout);
                $self->route_pc19($self->{call}, $line, @rout);
        }
-       if (@pc92out) {
+       if (@pc92out && !$pc92_slug_changes) {
                $self->route_pc92a($main::mycall, $line, $main::routeroot, @pc92out) if $self->{state} eq 'normal';
        }
 }
@@ -787,10 +782,8 @@ sub handle_20
        my $origin = shift;
 
        if ($self->{do_pc9x} && $self->{state} ne 'init92') {
-               dbg("PCPROT: disconnecting because login call not sent in any pc92") if isdbg('chanerr');
-               $self->send("**** You logged in with $self->{call} but that is NOT your \$mycall");
-               $self->disconnect;
-               return;
+               $self->send("Reseting to oldstyle routing because login call not sent in any pc92");
+               $self->{do_pc9x} = 0;
        }
        $self->send_local_config;
        $self->send(pc22());
@@ -814,11 +807,16 @@ sub handle_21
        eph_del_regex("^PC1[679].*$call");
 
        # if I get a PC21 from the same callsign as self then ignore it
-       if ($call eq $self->call) {
+       if ($call eq $self->{call}) {
                dbg("PCPROT: self referencing PC21 from $self->{call}");
                return;
        }
 
+       # for the above reason and also because of the check for PC21s coming
+       # in for self->call from outside being ignored further down
+       # we don't need any isolation code here, because we will never
+       # act on a PC21 with self->call in it.
+
        RouteDB::delete($call, $self->{call});
 
        my $parent = Route::Node::get($self->{call});
@@ -858,7 +856,6 @@ sub handle_21
        }
 
        if (eph_dup($line)) {
-               dbg("PCPROT: dup PC21 detected") if isdbg('chanerr');
                return;
        }
 
@@ -878,10 +875,8 @@ sub handle_22
 
        if ($self->{do_pc9x}) {
                if ($self->{state} ne 'init92') {
-                       dbg("PCPROT: disconnecting because login call not sent in any pc92") if isdbg('chanerr');
-                       $self->send("**** You logged in with $self->{call} but that is NOT your \$mycall");
-                       $self->disconnect;
-                       return;
+                       $self->send("Reseting to oldstyle routing because login call not sent in any pc92");
+                       $self->{do_pc9x} = 0;
                }
        }
        $self->{lastping} = 0;
@@ -905,10 +900,6 @@ sub handle_23
                }
        }
 
-       # only do a rspf check on PC23 (not 27)
-       if ($pcno == 23) {
-               return if $rspfcheck and !$self->rspfcheck(1, $_[8], $_[7])
-       }
 
        # do some de-duping
        my $d = cltounix($_[1], sprintf("%02d18Z", $_[2]));
@@ -968,7 +959,6 @@ sub handle_24
        return unless $nref || $uref; # if we don't know where they are, it's pointless sending it on
 
        if (eph_dup($line)) {
-               dbg("PCPROT: Dup PC24 ignored\n") if isdbg('chanerr');
                return;
        }
 
@@ -1049,7 +1039,7 @@ sub handle_34
        my $line = shift;
        my $origin = shift;
        if (eph_dup($line, $eph_pc34_restime)) {
-               dbg("PCPROT: dupe PC34, ignored") if isdbg('chanerr');
+               return;
        } else {
                $self->process_rcmd($_[1], $_[2], $_[2], $_[3]);
        }
@@ -1122,7 +1112,6 @@ sub handle_41
 
        my $l = "PC41^$call^$sort";
        if (eph_dup($l, $eph_info_restime)) {
-               dbg("PCPROT: dup PC41, ignored") if isdbg('chanerr');
                return;
        }
 
@@ -1203,7 +1192,6 @@ sub handle_49
        my $origin = shift;
 
        if (eph_dup($line)) {
-               dbg("PCPROT: Dup PC49 ignored\n") if isdbg('chanerr');
                return;
        }
 
@@ -1262,7 +1250,6 @@ sub handle_51
                RouteDB::update($from, $self->{call});
 
                if (eph_dup($line)) {
-                       dbg("PCPROT: dup PC51 detected") if isdbg('chanerr');
                        return;
                }
                # route down an appropriate thingy
@@ -1343,8 +1330,14 @@ sub _decode_pc92_call
        my $icall = shift;
        my @part = split /:/, $icall;
        my ($flag, $call) = unpack "A A*", $part[0];
-       return () unless defined $flag && $flag ge '0' && $flag le '7';
-       return () unless $call && is_callsign($call);
+       unless (defined $flag && $flag ge '0' && $flag le '7') {
+               dbg("PCPROT: $icall no flag byte (0-7) at front of call, ignored") if isdbg('chanerr');
+               return ();
+       }
+       unless ($call && is_callsign($call)) {
+               dbg("PCPROT: $icall no recognisable callsign, ignored") if isdbg('chanerr');
+               return ();
+       }
        my $is_node = $flag & 4;
        my $is_extnode = $flag & 2;
        my $here = $flag & 1;
@@ -1379,6 +1372,9 @@ sub _encode_pc92_call
        return "$flag$call$extra";
 }
 
+my %things_add;
+my %things_del;
+
 sub _add_thingy
 {
        my $parent = shift;
@@ -1394,6 +1390,10 @@ sub _add_thingy
                        dbg("ROUTE: added user $call to " . $parent->call) if isdbg('routelow');
                        @rout = $parent->add_user($call, Route::here($here));
                }
+               if ($pc92_slug_changes && $parent == $main::routeroot) {
+                       $things_add{$call} = Route::get($call);
+                       delete $things_del{$call};
+               }
        }
        return @rout;
 }
@@ -1405,31 +1405,58 @@ sub _del_thingy
        my ($call, $is_node, $is_extnode, $here, $version, $build) = @$s;
        my @rout;
        if ($call) {
+               my $ref;
                if ($is_node) {
-                       my $nref = Route::Node::get($call);
+                       $ref = Route::Node::get($call);
                        dbg("ROUTE: deleting node $call from " . $parent->call) if isdbg('routelow');
-                       @rout = $nref->del($parent) if $nref;
+                       @rout = $ref->del($parent) if $ref;
                } else {
-                       my $uref = Route::User::get($call);
+                       $ref = Route::User::get($call);
                        dbg("ROUTE: deleting user $call from " . $parent->call) if isdbg('routelow');
-                       @rout = $parent->del_user($uref) if $uref;
+                       @rout = $parent->del_user($ref) if $ref;
+               }
+               if ($pc92_slug_changes && $parent == $main::routeroot) {
+                       $things_del{$call} = $ref unless exists $things_add{$call};
+                       delete $things_add{$call};
                }
        }
        return @rout;
 }
 
+# this will only happen if we are slugging changes and
+# there are some changes to be sent, it will create an add or a delete
+# or both
+sub gen_pc92_changes
+{
+       my @add = values %things_add;
+       my @del = values %things_del;
+       return (\@add, \@del);
+}
+
+sub clear_pc92_changes
+{
+       %things_add = %things_del = ();
+       $last_pc92_slug = $main::systime;
+}
+
 my $_last_time;
 my $_last_occurs;
+my $_last_pc9x_id;
+
+sub last_pc9x_id
+{
+       return $_last_pc9x_id;
+}
 
 sub gen_pc9x_t
 {
        if (!$_last_time || $_last_time != $main::systime) {
                $_last_time = $main::systime;
                $_last_occurs = 0;
-               return $_last_time - $main::systime_daystart;
+               return $_last_pc9x_id = $_last_time - $main::systime_daystart;
        } else {
                $_last_occurs++;
-               return sprintf "%d.%02d", $_last_time - $main::systime_daystart, $_last_occurs;
+               return $_last_pc9x_id = sprintf "%d.%02d", $_last_time - $main::systime_daystart, $_last_occurs;
        }
 }
 
@@ -1448,22 +1475,27 @@ sub check_pc9x_t
                # the id on it is completely unreliable. Besides, only commands
                # originating on this box will go through this code...
                if ($parent->call ne $main::mycall) {
-                       my $lastid = $parent->lastid->{$pc} || 0;
+                       my $lastid = $parent->lastid || 0;
                        if ($t < $lastid) {
-                               if ($lastid-86400+$t > $pc9x_past_age) {
-                                       dbg("PCPROT: dup id on $t <= $lastid (midnight rollover), ignored") if isdbg('chanerr');
+                               if ($t+86400-$lastid > $pc9x_past_age) {
+                                       dbg("PCPROT: dup id on $t <= $lastid, ignored") if isdbg('chanerr');
                                        return;
                                }
-                       }
-                       if ($lastid >= $t) {
-                               dbg("PCPROT: dup id on $call $lastid >= $t, ignored") if isdbg('chanerr');
+                       } elsif ($t == $lastid) {
+                               dbg("PCPROT: dup id on $t == $lastid, ignored") if isdbg('chanerr');
                                return;
+                       } else {
+                               # $t > $lastid, check that the timestamp offered isn't too far away from 'now'
+                               if ($t+$main::systime_daystart-$main::systime > $pc9x_future_age ) {
+                                       dbg("PCPROT: id $t too far in the future, ignored") if isdbg('chanerr');
+                                       return;
+                               }
                        }
                }
        } elsif ($create) {
                $parent = Route::Node->new($call);
        }
-       $parent->lastid->{$pc} = $t;
+       $parent->lastid($t) if $parent;
 
        return $parent;
 }
@@ -1479,10 +1511,6 @@ sub handle_92
        my (@radd, @rdel);
 
        my $pcall = $_[1];
-       unless ($pcall) {
-               dbg("PCPROT: invalid callsign string '$_[1]', ignored") if isdbg('chanerr');
-               return;
-       }
        my $t = $_[2];
        my $sort = $_[3];
 
@@ -1492,9 +1520,17 @@ sub handle_92
        }
 
        if ($pcall eq $self->{call} && $self->{state} eq 'init') {
-               $self->state('init92');
-               $self->{do_pc9x} = 1;
-               dbg("Do pc9x set on $pcall");
+               if ($self->{isolate}) {
+                       dbg("PC9x received, but $pcall is isolated, ignored");
+                       return;
+               } elsif (!$self->user->wantpc9x) {
+                       dbg("PC9x explicitly switched off on $pcall, ignored");
+                       return;
+               } else {
+                       $self->state('init92');
+                       $self->{do_pc9x} = 1;
+                       dbg("Do pc9x set on $pcall");
+               }
        }
        unless ($self->{do_pc9x}) {
                dbg("PCPROT: PC9x come in from non-PC9x node, ignored") if isdbg('chanerr');
@@ -1551,10 +1587,24 @@ sub handle_92
                }
        } elsif ($sort eq 'A' || $sort eq 'D' || $sort eq 'C') {
 
+               # remember the last channel we arrived on
+               $parent->PC92C_dxchan($self->{call}) unless $self->{call} eq $parent->call;
+
                # this is the main route section
                # here is where all the routes are created and destroyed
 
-               my @ent = map {[ _decode_pc92_call($_) ]} grep {$_ && /^[0-7]/} @_[4 .. $#_];
+               # cope with missing duplicate node calls in the first slot for A or D
+               my $me = $_[4] || '';
+               if (($sort eq 'A' || $sort eq 'D')) {
+                       $me ||= _encode_pc92_call($parent) if !$me ;
+               } else {
+                       unless ($me) {
+                               dbg("PCPROT: this type of PC92 *must* have a node call in the first slot, ignored") if is_dbg('chanerr');
+                               return;
+                       }
+               }
+
+               my @ent = map {[ _decode_pc92_call($_) ]} grep {$_ && /^[0-7]/} $me, @_[5 .. $#_];
 
                if (@ent) {
 
@@ -1563,41 +1613,45 @@ sub handle_92
                        # otherwise use the node call and update any information
                        # that needs to be done.
                        my ($call, $is_node, $is_extnode, $here, $version, $build) = @{$ent[0]};
-                       if (($sort eq 'A' || $sort eq 'D') && !$is_node) {
-                               # parent is already set correctly
-                               # this is to allow shortcuts for A and D records
-                               # not repeating the origin call to no real purpose
-                               ;
-                       } else {
-                               if ($call && $is_node) {
-                                       if ($call eq $main::mycall) {
-                                               dbg("PCPROT: $call looped back onto $main::mycall, ignored") if isdbg('chanerr');
-                                               return;
-                                       }
-                                       if ($is_extnode) {
-                                               # this is only accepted from my "self"
-                                               if (DXChannel::get($call) && $call ne $self->{call}) {
-                                                       dbg("PCPROT: locally connected node config for $call from other another node $self->{call}, ignored") if isdbg('chanerr');
-                                                       return;
-                                               }
-                                               # reparent to external node (note that we must have received a 'C' or 'A' record
-                                               # from the true parent node for this external before we get one for the this node
-                                               unless ($parent = Route::Node::get($call)) {
+                       if ($call && $is_node) {
+                               if ($call eq $main::mycall) {
+                                       dbg("PCPROT: $call looped back onto $main::mycall, ignored") if isdbg('chanerr');
+                                       return;
+                               }
+                               # this is only accepted from my "self".
+                               # this also kills configs from PC92 nodes with external PC19 nodes that are also
+                               # locally connected. Local nodes always take precedence. But we remember the lastid
+                               # to try to reduce the number of dupe PC92s for this external node.
+                               if (DXChannel::get($call) && $call ne $self->{call}) {
+                                       $parent = check_pc9x_t($call, $t, 92); # this will update the lastid time
+                                       dbg("PCPROT: locally connected node $call from other another node $self->{call}, ignored") if isdbg('chanerr');
+                                       return;
+                               }
+                               if ($is_extnode) {
+                                       # reparent to external node (note that we must have received a 'C' or 'A' record
+                                       # from the true parent node for this external before we get one for the this node
+                                       unless ($parent = Route::Node::get($call)) {
+                                               if ($is_extnode && $oparent) {
+                                                       @radd =  _add_thingy($oparent, $ent[0]);
+                                                       $parent = $radd[0];
+                                               } else {
                                                        dbg("PCPROT: no previous C or A for this external node received, ignored") if isdbg('chanerr');
                                                        return;
                                                }
-                                               $parent = check_pc9x_t($call, $t, 92) || return;
-                                               $parent->via_pc92(1);
                                        }
-                               } else {
-                                       dbg("PCPROT: must be mycall or external node as first entry, ignored") if isdbg('chanerr');
-                                       return;
+                                       $parent = check_pc9x_t($call, $t, 92) || return;
+                                       $parent->via_pc92(1);
+                                       $parent->PC92C_dxchan($self->{call});
                                }
-                               $parent->here(Route::here($here));
-                               $parent->version($version) if $version && $version > $parent->version;
-                               $parent->build($build) if $build && $build > $parent->build;
-                               shift @ent;
+                       } else {
+                               dbg("PCPROT: must be \$mycall or external node as first entry, ignored") if isdbg('chanerr');
+                               return;
                        }
+                       $parent->here(Route::here($here));
+                       $parent->version($version || $pc19_version) if $version;
+                       $parent->build($build) if $build && $build > $parent->build;
+                       $parent->PC92C_dxchan($self->{call}) unless $self->{call} eq $parent->call;
+                       shift @ent;
                }
 
                # do a pass through removing any references to either locally connected nodes or mycall
@@ -1624,10 +1678,10 @@ sub handle_92
 
                        # we only reset obscounts on config records
                        $oparent->reset_obs;
-                       dbg("ROUTE: reset obscount on $pcall now " . $oparent->obscount) if isdbg('route');
+                       dbg("ROUTE: reset obscount on $pcall now " . $oparent->obscount) if isdbg('obscount');
                        if ($oparent != $parent) {
                                $parent->reset_obs;
-                               dbg("ROUTE: reset obscount on $parent->{call} now " . $parent->obscount) if isdbg('route');
+                               dbg("ROUTE: reset obscount on $parent->{call} now " . $parent->obscount) if isdbg('obscount');
                        }
 
                        #
@@ -1695,21 +1749,30 @@ sub handle_93
 
 #      $self->{do_pc9x} ||= 1;
 
-       my $pcall = $_[1];
-       unless (is_callsign($pcall)) {
-               dbg("PCPROT: invalid callsign string '$_[1]', ignored") if isdbg('chanerr');
+       my $pcall = $_[1];                      # this is now checked earlier
+
+       # remember that we are converting PC10->PC93 and self will be $main::me if it
+       # comes from us
+       unless ($self->{do_pc9x}) {
+               dbg("PCPROT: PC9x come in from non-PC9x node, ignored") if isdbg('chanerr');
                return;
        }
+
        my $t = $_[2];
        my $parent = check_pc9x_t($pcall, $t, 93, 1) || return;
 
-       my $to = $_[3];
-       my $from = $_[4];
-       my $via = $_[5];
+       my $to = uc $_[3];
+       my $from = uc $_[4];
+       my $via = uc $_[5];
        my $text = $_[6];
-       my $onode = $_[7];
+       my $onode = uc $_[7];
        $onode = $pcall if @_ <= 8;
 
+       # this is catch loops caused by bad software ...
+       if (eph_dup("PC93|$from|$text|$onode", $pc10_dupe_age)) {
+               return;
+       }
+
        # will we allow it at all?
        if ($censorpc) {
                my @bad;
@@ -1727,40 +1790,50 @@ sub handle_93
                return;
        }
 
-       if (is_callsign($to)) {
+       # if it is routeable then then treat it like a talk
+       my $ref = Route::get($to);
+       if ($ref) {
                # local talks
                my $dxchan;
                $dxchan = DXChannel::get($main::myalias) if $to eq $main::mycall;
                $dxchan = DXChannel::get($to) unless $dxchan;
-               if ($dxchan && $dxchan->is_user) {
-                       $dxchan->talk($from, $to, $via, $text, $onode);
-                       return;
+               # check it...
+               if ($dxchan) {
+                       if (ref $dxchan && $dxchan->isa('DXChannel')) {
+                               if ($dxchan->is_user) {
+                                       $dxchan->talk($from, $to, $via, $text, $onode);
+                                       return;
+                               }
+                       } else {
+                               dbg("ERROR: $to -> $dxchan is not a DXChannel! (local talk)");
+                       }
                }
 
                # convert to PC10 talks where appropriate
-               my $ref = Route::get($to);
-               if ($ref) {
-                       my @dxchan = $ref->alldxchan;
-                       for $dxchan (@dxchan) {
-                               if ($dxchan->{do_pc9x}) {
-                                       $dxchan->send($line);
-                               } else {
-                                       $dxchan->talk($from, $to, $via, $text, $onode);
-                               }
+               # just go for the "best" one for now (rather than broadcast)
+               $dxchan = $ref->dxchan;
+
+               # check it...
+               if (ref $dxchan && $dxchan->isa('DXChannel')) {
+                       if ($dxchan->{do_pc9x}) {
+                               $dxchan->send($line);
+                       } else {
+                               $dxchan->talk($from, $to, $via, $text, $onode);
                        }
-                       return;
+               } else {
+                       dbg("ERROR: $to -> $dxchan is not a DXChannel! (convert to pc10)");
                }
+               return;
 
-               # otherwise, drop through and allow it to be broadcast
-       } elsif ($to eq '*' || uc $to eq 'SYSOP' || uc $to eq 'WX') {
+       } elsif ($to eq '*' || $to eq 'SYSOP' || $to eq 'WX') {
                # announces
-               my $sysop = uc $to eq 'SYSOP' ? '*' : ' ';
-               my $wx = uc $to eq 'WX' ? '1' : '0';
+               my $sysop = $to eq 'SYSOP' ? '*' : ' ';
+               my $wx = $to eq 'WX' ? '1' : '0';
                my $local = $via eq 'LOCAL' ? '*' : $via;
 
-               $self->send_announce(1, pc12($from, $text, $local, $via, $sysop, $wx, $pcall), $from, $local, $text, $sysop, $pcall, $wx, $via eq 'LOCAL' ? $via : undef);
+               $self->send_announce(1, pc12($from, $text, $local, $sysop, $wx, $pcall), $from, $local, $text, $sysop, $pcall, $wx, $via eq 'LOCAL' ? $via : undef);
                return if $via eq 'LOCAL';
-       } else {
+       } elsif (!is_callsign($to) && $text =~ /^#\d+ /) {
                # chat messages to non-pc9x nodes
                $self->send_chat(1, pc12($from, $text, undef, $to, undef, $pcall), $from, '*', $text, $to, $pcall, '0');
        }
@@ -1782,9 +1855,7 @@ sub handle_default
        my $line = shift;
        my $origin = shift;
 
-       if (eph_dup($line)) {
-               dbg("PCPROT: Ephemeral dup, dropped") if isdbg('chanerr');
-       } else {
+       unless (eph_dup($line)) {
                if ($pcno >= 90) {
                        my $pcall = $_[1];
                        unless (is_callsign($pcall)) {