Change DXUser->get* to DXUser::get*
[spider.git] / perl / DXProtHandle.pm
index d8e9f2f78e8f341ebfe3525e004b56b0ac347cc9..e7160d7cb7148b0e59e5a809cd63258163f0e7b4 100644 (file)
@@ -2,10 +2,10 @@
 #
 # This module impliments the handlers for the protocal mode for a dx cluster
 #
-# Copyright (c) 1998-2006 Dirk Koopman G1TLH
+# Copyright (c) 1998-2007 Dirk Koopman G1TLH
+#
+#
 #
-# $Id$
-# 
 
 package DXProt;
 
@@ -37,18 +37,27 @@ use RouteDB;
 
 use strict;
 
-use vars qw($VERSION $BRANCH);
-($VERSION, $BRANCH) = dxver(q$Revision$);
-
 use vars qw($pc11_max_age $pc23_max_age $last_pc50 $eph_restime $eph_info_restime $eph_pc34_restime
                        $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
+                       $eph_pc15_restime $pc9x_past_age $pc9x_dupe_age
+                       $pc10_dupe_age $pc92_slug_changes $last_pc92_slug
+                       $pc92Ain $pc92Cin $pc92Din $pc92Kin $pc9x_time_tolerance
                   );
-       
+
+$pc9x_dupe_age = 60;                   # catch loops of circular (usually) D records
+$pc10_dupe_age = 45;                   # just something to catch duplicate PC10->PC93 conversions
+$pc92_slug_changes = 60;               # slug any changes going outward for this long
+$last_pc92_slug = 0;                   # the last time we sent out any delayed add or del PC92s
+$pc9x_time_tolerance = 15*60;  # the time on a pc9x is allowed to be out by this amount
+$pc9x_past_age = (122*60)+             # maximum age in the past of a px9x (a config record might be the only
+       $pc9x_time_tolerance;           # thing a node might send - once an hour and we allow an extra hour for luck)
+                                # this is actually the partition between "yesterday" and "today" but old.
+
+
 # incoming talk commands
 sub handle_10
 {
@@ -57,9 +66,11 @@ 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) {
                my @bad;
@@ -96,7 +107,7 @@ sub handle_10
        # if we are converting announces to talk is it a dup?
        if ($ann_to_talk) {
                if (AnnTalk::is_talk_candidate($from, $_[3]) && AnnTalk::dup($from, $to, $_[3])) {
-                       dbg("DXPROT: Dupe talk from announce, dropped") if isdbg('chanerr');
+                       dbg("PCPROT: Dupe talk from announce, dropped") if isdbg('chanerr');
                        return;
                }
        }
@@ -105,42 +116,8 @@ sub handle_10
        RouteDB::update($_[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
@@ -151,17 +128,16 @@ sub handle_11
        my $line = shift;
        my $origin = shift;
 
-       # route 'foreign' pc26s 
+       # route 'foreign' pc26s
        if ($pcno == 26) {
                if ($_[7] ne $main::mycall) {
                        $self->route($_[7], $line);
                        return;
                }
        }
-                       
-       # rsfp check
-       #                       return if $rspfcheck and !$self->rspfcheck(1, $_[7], $_[6]);
-       
+
+#      my ($hops) = $_[8] =~ /^H(\d+)/;
+
        # is the spotted callsign blank? This should really be trapped earlier but it
        # could break other protocol sentences. Also check for lower case characters.
        if ($_[2] =~ /^\s*$/) {
@@ -179,7 +155,7 @@ sub handle_11
                dbg("PCPROT: Bad Node, dropped") if isdbg('chanerr');
                return;
        }
-                       
+
        # if this is a 'bad spotter' user then ignore it
        my $nossid = $_[6];
        $nossid =~ s/-\d+$//;
@@ -187,7 +163,7 @@ sub handle_11
                dbg("PCPROT: Bad Spotter, dropped") if isdbg('chanerr');
                return;
        }
-                       
+
        # convert the date to a unix date
        my $d = cltounix($_[3], $_[4]);
        # bang out (and don't pass on) if date is invalid or the spot is too old (or too young)
@@ -201,7 +177,7 @@ sub handle_11
                dbg("PCPROT: Bad DX spot, ignored") if isdbg('chanerr');
                return;
        }
-                       
+
        # do some de-duping
        $_[5] =~ s/^\s+//;                      # take any leading blanks off
        $_[2] = unpad($_[2]);           # take off leading and trailing blanks from spotted callsign
@@ -220,7 +196,7 @@ sub handle_11
        # remember a route
 #      RouteDB::update($_[7], $self->{call});
 #      RouteDB::update($_[6], $_[7]);
-       
+
        my @spot = Spot::prepare($_[1], $_[2], $d, $_[5], $nossid, $_[7]);
        # global spot filtering on INPUT
        if ($self->{inspotsfilter}) {
@@ -239,7 +215,7 @@ sub handle_11
                return;
        }
 
-       # add it 
+       # add it
        Spot::add(@spot);
 
        #
@@ -248,16 +224,16 @@ sub handle_11
        # then  spotted itu, spotted cq, spotters itu, spotters cq
        # you should be able to route on any of these
        #
-                       
-       # fix up qra locators of known users 
-       my $user = DXUser->get_current($spot[4]);
+
+       # fix up qra locators of known users
+       my $user = DXUser::get_current($spot[4]);
        if ($user) {
                my $qra = $user->qra;
                unless ($qra && is_qra($qra)) {
                        my $lat = $user->lat;
                        my $long = $user->long;
                        if (defined $lat && defined $long) {
-                               $user->qra(DXBearing::lltoqra($lat, $long)); 
+                               $user->qra(DXBearing::lltoqra($lat, $long));
                                $user->put;
                        }
                }
@@ -295,14 +271,15 @@ sub handle_11
                        }
                }
        }
-                               
-       # local processing 
-       my $r;
-       eval {
-               $r = Local::spot($self, @spot);
-       };
-       #                       dbg("Local::spot1 error $@") if isdbg('local') if $@;
-       return if $r;
+
+       # local processing
+       if (defined &Local::spot) {
+               my $r;
+               eval {
+                       $r = Local::spot($self, @spot);
+               };
+               return if $r;
+       }
 
        # DON'T be silly and send on PC26s!
        return if $pcno == 26;
@@ -310,7 +287,7 @@ sub handle_11
        # send out the filtered spots
        send_dx_spot($self, $line, @spot) if @spot;
 }
-               
+
 # announces
 sub handle_12
 {
@@ -319,8 +296,6 @@ 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
 
@@ -348,9 +323,9 @@ sub handle_12
 
 
        my $dxchan;
-       
+
        if ((($dxchan = DXChannel::get($_[2])) && $dxchan->is_user) || $_[4] =~ /^[\#\w.]+$/){
-               $self->send_chat($line, @_[1..6]);
+               $self->send_chat(0, $line, @_[1..6]);
        } elsif ($_[2] eq '*' || $_[2] eq $main::mycall) {
 
                # remember a route
@@ -377,12 +352,21 @@ sub handle_12
                                }
                        }
                }
-       
+
                # send it
-               $self->send_announce($line, @_[1..6]);
+               $self->send_announce(0, $line, @_[1..6]);
        } else {
                $self->route($_[2], $line);
        }
+
+       # local processing
+       if (defined &Local::ann) {
+               my $r;
+               eval {
+                       $r = Local::ann($self, $line, @_[1..6]);
+               };
+               return if $r;
+       }
 }
 
 sub handle_15
@@ -393,15 +377,15 @@ 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
                }
        }
 }
-               
-# incoming user                
+
+# incoming user
 sub handle_16
 {
        my $self = shift;
@@ -413,7 +397,7 @@ sub handle_16
        my $dxchan;
        my $ncall = $_[1];
        my $newline = "PC16^";
-                       
+
        # dos I want users from this channel?
        unless ($self->user->wantpc16) {
                dbg("PCPROT: don't send users to $self->{call}") if isdbg('chanerr');
@@ -435,11 +419,16 @@ sub handle_16
        }
 
        if (eph_dup($line)) {
-               dbg("PCPROT: dup PC16 detected") if isdbg('chanerr');
                return;
        }
 
-       my $parent = Route::Node::get($ncall); 
+       # 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;
+       }
+
+       my $parent = Route::Node::get($ncall);
 
        if ($parent) {
                $dxchan = $parent->dxchan;
@@ -469,22 +458,22 @@ sub handle_16
                next if $call eq $main::mycall;
 
                eph_del_regex("^PC17\\^$call\\^$ncall");
-                               
+
                $conf = $conf eq '*';
 
                # reject this if we think it is a node already
                my $r = Route::Node::get($call);
-               my $u = DXUser->get_current($call) unless $r;
+               my $u = DXUser::get_current($call) unless $r;
                if ($r || ($u && $u->is_node)) {
                        dbg("PCPROT: $call is a node") if isdbg('chanerr');
                        next;
                }
-                               
+
                $r = Route::User::get($call);
                my $flags = Route::here($here)|Route::conf($conf);
-                               
+
                if ($r) {
-                       my $au = $r->addparent($parent);                                        
+                       my $au = $r->addparent($parent);
                        if ($r->flags != $flags) {
                                $r->flags($flags);
                                $au = $r;
@@ -492,28 +481,27 @@ sub handle_16
                        push @rout, $r if $h && $au;
                } else {
                        my @ans = $parent->add_user($call, $flags);
-                       push @rout, @ans if $h && @ans; 
+                       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;
 #              $self->route_pc92a($main::mycall, undef, $parent, @rout) if $h && $self->{state} eq 'normal';
        }
 }
-               
+
 # remove a user
 sub handle_17
 {
@@ -526,7 +514,7 @@ sub handle_17
        my $ucall = $_[1];
 
        eph_del_regex("^PC16\\^$ncall.*$ucall");
-                       
+
        # do I want users from this channel?
        unless ($self->user->wantpc16) {
                dbg("PCPROT: don't send users to $self->{call}") if isdbg('chanerr');
@@ -538,6 +526,12 @@ 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);
@@ -549,7 +543,7 @@ sub handle_17
        unless ($parent) {
                dbg("PCPROT: Route::Node $ncall not in config") if isdbg('chanerr');
                return;
-       }                       
+       }
 
        $dxchan = DXChannel::get($ncall);
        if ($dxchan && $dxchan ne $self) {
@@ -570,22 +564,22 @@ sub handle_17
        }
 
        # input filter if required and then remove user if present
-#              return unless $self->in_filter_route($parent);  
+#              return unless $self->in_filter_route($parent);
        $parent->del_user($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;
        }
 
        $self->route_pc17($origin, $line, $parent, $uref);
 #      $self->route_pc92d($main::mycall, undef, $parent, $uref) if $dxchan;
 }
-               
+
 # link request
 sub handle_18
 {
@@ -593,44 +587,58 @@ sub handle_18
        my $pcno = shift;
        my $line = shift;
        my $origin = shift;
-       $self->state('init');   
+       $self->state('init');
+
+       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);
-               $self->build(0 + $2);
-               $self->user->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 $parent = Route::Node::get($self->{call});
        my @rout = $parent->del_nodes;
        $self->route_pc21($origin, $line, @rout, $parent) if @rout;
        $self->send_local_config();
        $self->send(pc20());
 }
-               
+
 sub check_add_node
 {
        my $call = shift;
-       
+
        # add this station to the user database, if required (don't remove SSID from nodes)
-       my $user = DXUser->get_current($call);
+       my $user = DXUser::get_current($call);
        if (!$user) {
                $user = DXUser->new($call);
                $user->priv(1);         # I have relented and defaulted nodes
@@ -659,22 +667,22 @@ sub handle_19
        # first get the INTERFACE node
        my $parent = Route::Node::get($self->{call});
        unless ($parent) {
-               dbg("DXPROT: my parent $self->{call} has disappeared");
+               dbg("PCPROT: my parent $self->{call} has disappeared");
                $self->disconnect;
                return;
        }
 
        my $h;
-       
+
        # parse the PC19
-       # 
+       #
        # We are making a major change from now on. We are only going to accept
        # PC19s from directly connected nodes.  This means that we are probably
-       # going to throw away most of the data that we are being sent. 
+       # going to throw away most of the data that we are being sent.
        #
        # The justification for this is that most of it is wrong or out of date
-       # anyway. 
-       # 
+       # anyway.
+       #
        # From now on we are only going to believe PC92 data and locally connected
        # non-pc92 nodes.
        #
@@ -686,7 +694,7 @@ sub handle_19
                next unless defined $here && defined $conf && is_callsign($call);
 
                eph_del_regex("^PC(?:21\\^$call|17\\^[^\\^]+\\^$call)");
-                               
+
                # check for sane parameters
                #                               $ver = 5000 if $ver eq '0000';
                next unless $ver && $ver =~ /^\d+$/;
@@ -706,8 +714,14 @@ 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)) {
 #                      dbg("PCPROT: dup PC19 for $call detected") if isdbg('chanerr');
 #                      next;
@@ -758,7 +772,7 @@ sub handle_19
                # unbusy and stop and outgoing mail (ie if somehow we receive another PC19 without a disconnect)
                my $mref = DXMsg::get_busy($call);
                $mref->stop_msg($call) if $mref;
-                               
+
                $user->lastin($main::systime) unless DXChannel::get($call);
                $user->put;
        }
@@ -770,25 +784,10 @@ 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';
        }
 }
-               
-sub send_delayed_pc92
-{
-       my $self = shift;
-       
-       # send out new PC92 config to everyone else 
-       my $line = gen_my_pc92_config($main::me);
-       $self->broadcast_route_pc9x($main::mycall, undef, $line, 0);
-
-       # if this is an external node then send out the external config
-       unless ($self->{do_pc9x}) {
-               $line = gen_my_pc92_config(Route::Node::get($self->{call}));
-               $self->broadcast_route_pc9x($main::mycall, undef, $line, 0);
-       }
-}
 
 # send local configuration
 sub handle_20
@@ -799,18 +798,16 @@ 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_local_config;
        $self->send(pc22());
        $self->state('normal');
        $self->{lastping} = 0;
-       $self->send_delayed_pc92;
+       $self->route_pc92a($main::mycall, undef, $main::routeroot, Route::Node::get($self->{call}));
 }
-               
+
 # delete a cluster from the list
 #
 # This should never occur for directly connected nodes.
@@ -824,13 +821,18 @@ sub handle_21
        my $call = uc $_[1];
 
        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});
@@ -841,11 +843,11 @@ sub handle_21
        }
 
        my @rout;
-       
+
        if ($call ne $main::mycall) { # don't allow malicious buggers to disconnect me!
                my $node = Route::Node::get($call);
                if ($node) {
-                       
+
                        if ($node->via_pc92) {
                                dbg("PCPROT: controlled by PC92, ignored") if isdbg('chanerr');
                                return;
@@ -856,10 +858,10 @@ sub handle_21
                                dbg("PCPROT: PC21 from $self->{call} trying to alter locally connected $call, ignored!") if isdbg('chanerr');
                                return;
                        }
-                       
+
                        # input filter it
                        return unless $self->in_filter_route($node);
-                       
+
                        # routing objects, force a PC21 if it is local
                        push @rout, $node->del($parent);
                        push @rout, $call if $dxchan && @rout == 0;
@@ -869,12 +871,16 @@ sub handle_21
                return;
        }
 
+       if (eph_dup($line)) {
+               return;
+       }
+
        if (@rout) {
                $self->route_pc21($origin, $line, @rout);
 #              $self->route_pc92d($main::mycall, $line, $main::routeroot, @rout);
        }
 }
-               
+
 
 sub handle_22
 {
@@ -885,17 +891,15 @@ 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;
        $self->state('normal');
-       $self->send_delayed_pc92;
+       $self->route_pc92a($main::mycall, undef, $main::routeroot, Route::Node::get($self->{call}));
 }
-                               
+
 # WWV info
 sub handle_23
 {
@@ -903,8 +907,8 @@ sub handle_23
        my $pcno = shift;
        my $line = shift;
        my $origin = shift;
-                       
-       # route foreign' pc27s 
+
+       # route foreign' pc27s
        if ($pcno == 27) {
                if ($_[8] ne $main::mycall) {
                        $self->route($_[8], $line);
@@ -912,10 +916,6 @@ 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", $_[2]));
@@ -943,16 +943,17 @@ sub handle_23
                dbg("PCPROT: Dup WWV Spot ignored\n") if isdbg('chanerr');
                return;
        }
-               
+
        # note this only takes the first one it gets
        Geomag::update($d, $_[2], $sfi, $k, $i, @_[6..8], $r);
 
-       my $rep;
-       eval {
-               $rep = Local::wwv($self, $_[1], $_[2], $sfi, $k, $i, @_[6..8], $r);
-       };
-       #                       dbg("Local::wwv2 error $@") if isdbg('local') if $@;
-       return if $rep;
+       if (defined &Local::wwv) {
+               my $rep;
+               eval {
+                       $rep = Local::wwv($self, $_[1], $_[2], $sfi, $k, $i, @_[6..8], $r);
+               };
+               return if $rep;
+       }
 
        # DON'T be silly and send on PC27s!
        return if $pcno == 27;
@@ -960,7 +961,7 @@ sub handle_23
        # broadcast to the eager world
        send_wwv_spot($self, $line, $d, $_[2], $sfi, $k, $i, @_[6..8]);
 }
-               
+
 # set here status
 sub handle_24
 {
@@ -973,12 +974,11 @@ sub handle_24
        $nref = Route::Node::get($call);
        $uref = Route::User::get($call);
        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;
        }
-       
+
        $nref->here($_[2]) if $nref;
        $uref->here($_[2]) if $uref;
        my $ref = $nref || $uref;
@@ -986,7 +986,7 @@ sub handle_24
 
        $self->route_pc24($origin, $line, $ref, $_[3]);
 }
-               
+
 # merge request
 sub handle_25
 {
@@ -1004,7 +1004,7 @@ sub handle_25
        }
 
        Log('DXProt', "Merge request for $_[3] spots and $_[4] WWV from $_[2]");
-                       
+
        # spots
        if ($_[3] > 0) {
                my @in = reverse Spot::search(1, undef, undef, 0, $_[3]);
@@ -1048,7 +1048,7 @@ sub handle_30 {goto &handle_28}
 sub handle_31 {goto &handle_28}
 sub handle_32 {goto &handle_28}
 sub handle_33 {goto &handle_28}
-               
+
 sub handle_34
 {
        my $self = shift;
@@ -1056,12 +1056,12 @@ 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], $_[3]);
        }
 }
-               
+
 # remote command replies
 sub handle_35
 {
@@ -1072,7 +1072,7 @@ sub handle_35
        eph_del_regex("^PC35\\^$_[2]\\^$_[1]\\^");
        $self->process_rcmd_reply($_[1], $_[2], $_[1], $_[3]);
 }
-               
+
 sub handle_36 {goto &handle_34}
 
 # database stuff
@@ -1099,7 +1099,7 @@ sub handle_38
        my $line = shift;
        my $origin = shift;
 }
-               
+
 # incoming disconnect
 sub handle_39
 {
@@ -1115,7 +1115,7 @@ sub handle_39
 }
 
 sub handle_40 {goto &handle_28}
-               
+
 # user info
 sub handle_41
 {
@@ -1124,41 +1124,41 @@ sub handle_41
        my $line = shift;
        my $origin = shift;
        my $call = $_[1];
+       my $sort = $_[2];
+       my $val = $_[3];
 
-       my $l = $line;
-       $l =~ s/[\x00-\x20\x7f-\xff]+//g; # remove all funny characters and spaces for dup checking
+       my $l = "PC41^$call^$sort";
        if (eph_dup($l, $eph_info_restime)) {
-               dbg("PCPROT: dup PC41, ignored") if isdbg('chanerr');
                return;
        }
-                       
+
        # input filter if required
        #                       my $ref = Route::get($call) || Route->new($call);
        #                       return unless $self->in_filter_route($ref);
 
-       if ($_[3] eq $_[2] || $_[3] =~ /^\s*$/) {
+       if ($val eq $sort || $val =~ /^\s*$/) {
                dbg('PCPROT: invalid value') if isdbg('chanerr');
                return;
        }
 
        # add this station to the user database, if required
-       my $user = DXUser->get_current($call);
+       my $user = DXUser::get_current($call);
        $user = DXUser->new($call) unless $user;
-                       
-       if ($_[2] == 1) {
-               if (($_[3] =~ /spotter/i || $_[3] =~ /self/i) && $user->name && $user->name ne $_[3]) {
+
+       if ($sort == 1) {
+               if (($val =~ /spotter/i || $val =~ /self/i) && $user->name && $user->name ne $val) {
                        dbg("PCPROT: invalid name") if isdbg('chanerr');
                        if ($main::mycall eq 'GB7DJK' || $main::mycall eq 'GB7BAA' || $main::mycall eq 'WR3D') {
                                DXChannel::broadcast_nodes(pc41($_[1], 1, $user->name)); # send it to everyone including me
                        }
                        return;
                }
-               $user->name($_[3]);
-       } elsif ($_[2] == 2) {
-               $user->qth($_[3]);
-       } elsif ($_[2] == 3) {
-               if (is_latlong($_[3])) {
-                       my ($lat, $long) = DXBearing::stoll($_[3]);
+               $user->name($val);
+       } elsif ($sort == 2) {
+               $user->qth($val);
+       } elsif ($sort == 3) {
+               if (is_latlong($val)) {
+                       my ($lat, $long) = DXBearing::stoll($val);
                        $user->lat($lat) if $lat;
                        $user->long($long) if $long;
                        $user->qra(DXBearing::lltoqra($lat, $long)) unless $user->qra;
@@ -1166,14 +1166,14 @@ sub handle_41
                        dbg('PCPROT: not a valid lat/long') if isdbg('chanerr');
                        return;
                }
-       } elsif ($_[2] == 4) {
-               $user->homenode($_[3]);
-       } elsif ($_[2] == 5) {
-               if (is_qra(uc $_[3])) {
-                       my ($lat, $long) = DXBearing::qratoll(uc $_[3]);
+       } elsif ($sort == 4) {
+               $user->homenode($val);
+       } elsif ($sort == 5) {
+               if (is_qra(uc $val)) {
+                       my ($lat, $long) = DXBearing::qratoll(uc $val);
                        $user->lat($lat) if $lat && !$user->lat;
                        $user->long($long) if $long && !$user->long;
-                       $user->qra(uc $_[3]);
+                       $user->qra(uc $val);
                } else {
                        dbg('PCPROT: not a valid QRA locator') if isdbg('chanerr');
                        return;
@@ -1187,7 +1187,7 @@ sub handle_41
        }
 
        #  perhaps this IS what we want after all
-       #                       $self->route_pc41($ref, $call, $_[2], $_[3], $_[4]);
+       #                       $self->route_pc41($ref, $call, $sort, $val, $_[4]);
 }
 
 sub handle_42 {goto &handle_28}
@@ -1199,7 +1199,7 @@ sub handle_45 {goto &handle_37}
 sub handle_46 {goto &handle_37}
 sub handle_47 {goto &handle_37}
 sub handle_48 {goto &handle_37}
-               
+
 # message and database
 sub handle_49
 {
@@ -1209,10 +1209,9 @@ sub handle_49
        my $origin = shift;
 
        if (eph_dup($line)) {
-               dbg("PCPROT: Dup PC49 ignored\n") if isdbg('chanerr');
                return;
        }
-       
+
        if ($_[1] eq $main::mycall) {
                DXMsg::handle_49($self, @_);
        } else {
@@ -1228,6 +1227,8 @@ sub handle_50
        my $line = shift;
        my $origin = shift;
 
+       return if (eph_dup($line));
+
        my $call = $_[1];
 
        RouteDB::update($call, $self->{call});
@@ -1235,15 +1236,19 @@ sub handle_50
        my $node = Route::Node::get($call);
        if ($node) {
                return unless $node->call eq $self->{call};
-               $node->usercount($_[2]);
+               $node->usercount($_[2]) unless $node->users;
+               $node->reset_obs;
 
                # input filter if required
-               return unless $self->in_filter_route($node);
+#              return unless $self->in_filter_route($node);
 
-               $self->route_pc50($origin, $line, $node, $_[2], $_[3]) unless eph_dup($line);
+               unless ($self->{isolate}) {
+                       DXChannel::broadcast_nodes($line, $self); # send it to everyone but me
+               }
+#              $self->route_pc50($origin, $line, $node, $_[2], $_[3]) unless eph_dup($line);
        }
 }
-               
+
 # incoming ping requests/answers
 sub handle_51
 {
@@ -1255,7 +1260,7 @@ sub handle_51
        my $from = $_[2];
        my $flag = $_[3];
 
-                       
+
        # is it for us?
        if ($to eq $main::mycall) {
                if ($flag == 1) {
@@ -1268,7 +1273,6 @@ 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
@@ -1276,6 +1280,8 @@ sub handle_51
        }
 }
 
+sub handle_61 { goto &handle_11; }
+
 # dunno but route it
 sub handle_75
 {
@@ -1297,7 +1303,7 @@ sub handle_73
        my $line = shift;
        my $origin = shift;
        my $call = $_[1];
-                       
+
        # do some de-duping
        my $d = cltounix($call, sprintf("%02d18Z", $_[2]));
        if (($pcno == 23 && $d < $main::systime - $pc23_max_age) || $d > $main::systime + 1500 || $_[2] < 0 || $_[2] > 23) {
@@ -1309,15 +1315,16 @@ sub handle_73
                dbg("PCPROT: Dup WCY Spot ignored\n") if isdbg('chanerr');
                return;
        }
-               
+
        my $wcy = WCY::update($d, @_[2..12]);
 
-       my $rep;
-       eval {
-               $rep = Local::wcy($self, @_[1..12]);
-       };
-       # dbg("Local::wcy error $@") if isdbg('local') if $@;
-       return if $rep;
+       if (defined &Local::wcy) {
+               my $rep;
+               eval {
+                       $rep = Local::wcy($self, @_[1..12]);
+               };
+               return if $rep;
+       }
 
        # broadcast to the eager world
        send_wcy_spot($self, $line, $d, @_[2..12]);
@@ -1349,8 +1356,14 @@ 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;
@@ -1361,9 +1374,13 @@ sub _decode_pc92_call
 sub _encode_pc92_call
 {
        my $ref = shift;
+
+       # plain call or value
+       return $ref unless ref $ref;
+
        my $ext = shift;
        my $flag = 0;
-       my $call = $ref->call; 
+       my $call = $ref->call;
        my $extra = '';
        $flag |= $ref->here ? 1 : 0;
        if ($ref->isa('Route::Node') || $ref->isa('DXProt')) {
@@ -1381,6 +1398,9 @@ sub _encode_pc92_call
        return "$flag$call$extra";
 }
 
+my %things_add;
+my %things_del;
+
 sub _add_thingy
 {
        my $parent = shift;
@@ -1396,6 +1416,10 @@ 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;
 }
@@ -1407,31 +1431,58 @@ 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;
        }
 }
 
@@ -1442,21 +1493,128 @@ sub check_pc9x_t
        my $pc = shift;
        my $create = shift;
 
+       # check that the time is between 0 >= $t < 86400
+       unless ($t >= 0 && $t < 86400) {
+               dbg("PCPROT: time invalid t: $t, ignored") if isdbg('chanerr');
+               return undef;
+       }
+
+       # check that the time of this pc9x is within tolerance (default 15 mins either way)
+       my $now = $main::systime - $main::systime_daystart ;
+       my $diff = abs($now - $t);
+       unless ($diff < $pc9x_time_tolerance || 86400 - $diff < $pc9x_time_tolerance) {
+               my $c = ref $call ? $call->call : $call;
+               dbg("PC9XERR: $c time out of range t: $t now: $now diff: $diff > $pc9x_time_tolerance, ignored") if isdbg('chan');
+               return undef;
+       }
+
        my $parent = ref $call ? $call : Route::Node::get($call);
        if ($parent) {
-               my $lastid = $parent->lastid->{$pc} || 0;
-               if ($lastid + $main::systime_daystart >= $t + $main::systime_daystart) {
-                       dbg("PCPROT: dup / old id on $call <= $lastid, ignored") if isdbg('chanerr');
-                       return;
+               # we only do this for external calls whose routing table
+               # record come and go. The reference for mycall is permanent
+               # and not that frequently used, it also never times out, so
+               # the id on it is completely unreliable. Besides, only commands
+               # originating on this box will go through this code...
+               if ($parent->call ne $main::mycall) {
+                       my $lastid = $parent->lastid;
+                       if (defined $lastid) {
+                               if ($t < $lastid) {
+                                       # note that this is where we determine whether this pc9x has come in yesterday
+                                       # but is still greater (modulo 86400) than the lastid or is simply an old
+                                       # duplicate sentence. To determine this we need to do some module 86400
+                                       # arithmetic. High numbers mean that this is an old duplicate sentence,
+                                       # low numbers that it is a new sentence.
+                                       #
+                                       # Typically you will see yesterday being taken on $t = 84, $lastid = 86235
+                                       # and old dupes with $t = 234, $lastid = 256 (which give answers 249 and
+                                       # 86378 respectively in the calculation below).
+                                       #
+                                       if ($t+86400-$lastid > $pc9x_past_age) {
+                                               dbg("PCPROT: dup id on $t <= lastid $lastid, ignored") if isdbg('chanerr') || isdbg('pc92dedupe');
+                                               return undef;
+                                       }
+                               } elsif ($t == $lastid) {
+                                       dbg("PCPROT: dup id on $t == lastid $lastid, ignored") if isdbg('chanerr') || isdbg('pc92dedupe');
+                                       return undef;
+                               } else {
+                                       # check that if we have a low number in lastid that yesterday's numbers
+                                       # (likely in the 85000+ area) don't override them, thus causing flip flopping
+                                       if ($lastid+86400-$t < $pc9x_past_age) {
+                                               dbg("PCPROT: dup id on $t in yesterday, lastid $lastid, ignored") if isdbg('chanerr') || isdbg('pc92dedupe');
+                                               return undef;
+                                       }
+                               }
+                       }
                }
        } elsif ($create) {
                $parent = Route::Node->new($call);
+       } else {
+               dbg("PCPROT: $call does not exist, ignored") if isdbg('pc92dedupe');
+               return undef;
+       }
+       if (isdbg('pc92dedupe')) {
+               my $exists = exists $parent->{lastid}; # naughty, naughty :-)
+               my $val = $parent->{lastid};
+               my $s = $exists ? (defined $val ? $val : 'exists/undef') : 'undef';
+               dbg("PCPROT: $call pc92 id lastid $s -> $t");
        }
-       $parent->lastid->{$pc} = $t;
+       $parent->lastid($t);
 
        return $parent;
 }
 
+sub pc92_handle_first_slot
+{
+       my $self = shift;
+       my $slot = shift;
+       my $parent = shift;
+       my $t = shift;
+       my $oparent = $parent;
+
+       my @radd;
+
+       my ($call, $is_node, $is_extnode, $here, $version, $build) = @$slot;
+       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, $slot);
+                                       $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);
+                       $parent->PC92C_dxchan($self->{call});
+               }
+       } 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;
+       $parent->PC92C_dxchan($self->{call}) unless $self->{call} eq $parent->call;
+       return ($parent, @radd);
+}
+
 # DXSpider routing entries
 sub handle_92
 {
@@ -1466,151 +1624,226 @@ sub handle_92
        my $origin = shift;
 
        my (@radd, @rdel);
-       
+
        my $pcall = $_[1];
-       unless ($pcall) {
-               dbg("PCPROT: invalid callsign string '$_[1]', ignored") if isdbg('chanerr');
-               return;
-       }
        my $t = $_[2];
        my $sort = $_[3];
-       my @ent = map {[ _decode_pc92_call($_) ]} grep {$_ && /^[0-7]/} @_[4 .. $#_];
-       
+
+       # this catches loops of A/Ds
+#      if (eph_dup($line, $pc9x_dupe_age)) {
+#              return;
+#      }
+
        if ($pcall eq $main::mycall) {
                dbg("PCPROT: looped back, ignored") if isdbg('chanerr');
                return;
        }
 
        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');
                return;
        }
 
-       my $parent = check_pc9x_t($pcall, $t, 92, 1) || return;
+       # don't create routing entries for D records that don't already exist
+       # this is what causes all those PC92 loops!
+       my $parent = check_pc9x_t($pcall, $t, 92, $sort ne 'D') || return;
        my $oparent = $parent;
-       
+
        $parent->do_pc9x(1);
        $parent->via_pc92(1);
 
-       if (@ent) {
+       if ($sort eq 'F' || $sort eq 'R') {
+
+               # this is the route finding section
+               # here is where the consequences of the 'find' command
+               # are dealt with
+
+               my $from = $_[4];
+               my $target = $_[5];
 
-               # look at the first one which will always be a node of some sort
-               # and update any information that needs to be done. 
-               my ($call, $is_node, $is_extnode, $here, $version, $build) = @{$ent[0]}; 
-               if ($call && $is_node) {
-                       if ($call eq $main::mycall) {
-                               dbg("PCPROT: looped back on node entry, ignored") if isdbg('chanerr');
+               if ($sort eq 'F') {
+                       my $flag;
+                       my $ref;
+                       my $dxchan;
+                       if ($ref = DXChannel::get($target)) {
+                               $flag = 1;              # we are directly connected
+                       } else {
+                               $ref = Route::get($target);
+                               $dxchan = $ref->dxchan;
+                               $flag = 2;
+                       }
+                       if ($ref && $flag && $dxchan) {
+                               $self->send(pc92r($from, $target, $flag, int($dxchan->{pingave}*1000)));
                                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($call)) {
-                                       dbg("PCPROT: no previous C or A for this external node received, ignored") if isdbg('chanerr');
-                                       return;
+               } elsif ($sort eq 'R') {
+                       if (my $dxchan = DXChannel::get($from)) {
+                               handle_pc92_find_reply($dxchan, $pcall, $from, $target, @_[6,7]);
+                       } else {
+                               my $ref = Route::get($from);
+                               if ($ref) {
+                                       my @dxchan = grep {$_->do_pc9x} $ref->alldxchan;
+                                       if (@dxchan) {
+                                               $_->send($line) for @dxchan;
+                                       } else {
+                                               dbg("PCPROT: no return route, ignored") if isdbg('chanerr')
+                                       }
+                               } else {
+                                       dbg("PCPROT: no return route, ignored") if isdbg('chanerr')
                                }
-                               $parent = check_pc9x_t($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;
                }
-               $parent->here(Route::here($here));
-               $parent->version($version) if $version && $version > $parent->version;
-               $parent->build($build) if $build && $build > $parent->build;
-               shift @ent;
-       }
-
-       # do a pass through removing any references to either locally connected nodes or mycall
-       my @nent;
-       for (@ent) {
-               next unless $_;
-               if ($_->[0] eq $main::mycall || DXChannel::get($_->[0])) {
-                       dbg("PCPROT: $_->[0] refers to locally connected node, ignored") if isdbg('chanerr');
-                       next;
-               } 
-               push @nent, $_;
-       }
 
-       if ($sort eq 'A') {
-               for (@nent) {
-                       push @radd, _add_thingy($parent, $_);
+       } elsif ($sort eq 'K') {
+               $pc92Kin += length $line if $sort eq 'K';
+
+               # remember the last channel we arrived on
+               $parent->PC92C_dxchan($self->{call}) unless $self->{call} eq $parent->call;
+
+               my @ent = _decode_pc92_call($_[4]);
+
+               if (@ent) {
+                       my $add;
+
+                       ($parent, $add) = $self->pc92_handle_first_slot(\@ent, $parent, $t);
+                       return unless $parent; # dupe
+
+                       push @radd, $add if $add;
+                       $parent->reset_obs;
+                       $parent->version($ent[4]) if $ent[4];
+                       $parent->build($ent[5]) if $ent[5];
+
+                       dbg("ROUTE: reset obscount on $parent->{call} now " . $parent->obscount) if isdbg('obscount');
                }
-       } elsif ($sort eq 'D') {
-               for (@nent) {
-                       push @rdel, _del_thingy($parent, $_);
+       } elsif ($sort eq 'A' || $sort eq 'D' || $sort eq 'C') {
+
+               $pc92Ain += length $line if $sort eq 'A';
+               $pc92Cin += length $line if $sort eq 'C';
+               $pc92Din += length $line if $sort eq 'D';
+
+               # 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
+
+               # cope with missing duplicate node calls in the first slot
+               my $me = $_[4] || '';
+               $me ||= _encode_pc92_call($parent) unless $me ;
+
+               my @ent = map {my @a = _decode_pc92_call($_); @a ? \@a : ()} grep {$_ && /^[0-7]/} $me, @_[5 .. $#_];
+
+               if (@ent) {
+
+                       # look at the first one which will always be a node of some sort
+                       # except in the case of 'A' or 'D' in which the $pcall is used
+                       # otherwise use the node call and update any information
+                       # that needs to be done.
+                       my $add;
+
+                       ($parent, $add) = $self->pc92_handle_first_slot($ent[0], $parent, $t);
+                       return unless $parent; # dupe
+
+                       shift @ent;
+                       push @radd, $add if $add;
                }
-       } elsif ($sort eq 'C') {
-               my (@nodes, @users);
 
-               # we only reset obscounts on config records
-               $oparent->reset_obs;
-               dbg("ROUTE: reset obscount on $pcall now " . $oparent->obscount) if isdbg('route');
-               if ($oparent != $parent) {
-                       $parent->reset_obs;
-                       dbg("ROUTE: reset obscount on $parent->{call} now " . $parent->obscount) if isdbg('route');
+               # do a pass through removing any references to either locally connected nodes or mycall
+               my @nent;
+               for (@ent) {
+                       next unless $_ && @$_;
+                       if ($_->[0] eq $main::mycall || DXChannel::get($_->[0])) {
+                               dbg("PCPROT: $_->[0] refers to locally connected node, ignored") if isdbg('chanerr');
+                               next;
+                       }
+                       push @nent, $_;
                }
 
-               # 
-               foreach my $r (@nent) {
-#                      my ($call, $is_node, $is_extnode, $here, $version, $build) = _decode_pc92_call($_);                     
-                       if ($r->[0]) {
-                               if ($r->[1]) {
-                                       push @nodes, $r->[0];
+               if ($sort eq 'A') {
+                       for (@nent) {
+                               push @radd, _add_thingy($parent, $_);
+                       }
+               } elsif ($sort eq 'D') {
+                       for (@nent) {
+                               push @rdel, _del_thingy($parent, $_);
+                       }
+               } elsif ($sort eq 'C') {
+                       my (@nodes, @users);
+
+                       # we reset obscounts on config records as well as K records
+                       $parent->reset_obs;
+                       dbg("ROUTE: reset obscount on $parent->{call} now " . $parent->obscount) if isdbg('obscount');
+
+                       #
+                       foreach my $r (@nent) {
+                               #                       my ($call, $is_node, $is_extnode, $here, $version, $build) = _decode_pc92_call($_);
+                               if ($r->[0]) {
+                                       if ($r->[1]) {
+                                               push @nodes, $r->[0];
+                                       } else {
+                                               push @users, $r->[0];
+                                       }
                                } else {
-                                       push @users, $r->[0];
+                                       dbg("PCPROT: pc92 call entry '$_' not decoded, ignored") if isdbg('chanerr');
                                }
-                       } else {
-                               dbg("DXPROT: pc92 call entry '$_' not decoded, ignored") if isdbg('chanerr'); 
                        }
-               }
 
-               my ($dnodes, $dusers, $nnodes, $nusers) = $parent->calc_config_changes(\@nodes, \@users);
+                       my ($dnodes, $dusers, $nnodes, $nusers) = $parent->calc_config_changes(\@nodes, \@users);
 
-               # add users here
-               foreach my $r (@nent) {
-                       my $call = $r->[0];
-                       if ($call) {
-                               push @radd,_add_thingy($parent, $r) if grep $call eq $_, (@$nnodes, @$nusers);
+                       # add users here
+                       foreach my $r (@nent) {
+                               my $call = $r->[0];
+                               if ($call) {
+                                       push @radd,_add_thingy($parent, $r) if grep $call eq $_, (@$nnodes, @$nusers);
+                               }
                        }
+                       # del users here
+                       foreach my $r (@$dnodes) {
+                               push @rdel,_del_thingy($parent, [$r, 1]);
+                       }
+                       foreach my $r (@$dusers) {
+                               push @rdel,_del_thingy($parent, [$r, 0]);
+                       }
+
+                       # remember this last PC92C for rebroadcast on demand
+                       $parent->last_PC92C($line);
+               } else {
+                       dbg("PCPROT: unknown action '$sort', ignored") if isdbg('chanerr');
+                       return;
                }
-               # del users here
-               foreach my $r (@$dnodes) {
-                       push @rdel,_del_thingy($parent, [$r, 1]);
-               }
-               foreach my $r (@$dusers) {
-                       push @rdel,_del_thingy($parent, [$r, 0]);
+
+               foreach my $r (@rdel) {
+                       next unless $r;
+
+                       $self->route_pc21($pcall, undef, $r) if $r->isa('Route::Node');
+                       $self->route_pc17($pcall, undef, $parent, $r) if $r->isa('Route::User');
                }
-       } else {
-               dbg("PCPROT: unknown action '$sort', ignored") if isdbg('chanerr');
-               return;
+               my @pc19 = grep { $_ && $_->isa('Route::Node') } @radd;
+               my @pc16 = grep { $_ && $_->isa('Route::User') } @radd;
+               unshift @pc19, $parent if $self->{state} eq 'init92' && $oparent == $parent;
+               $self->route_pc19($pcall, undef, @pc19) if @pc19;
+               $self->route_pc16($pcall, undef, $parent, @pc16) if @pc16;
        }
 
+       # broadcast it if we get here
        $self->broadcast_route_pc9x($pcall, undef, $line, 0);
-       foreach my $r (@rdel) {
-               next unless $r;
-               
-               $self->route_pc21($pcall, undef, $r) if $r->isa('Route::Node');
-               $self->route_pc17($pcall, undef, $parent, $r) if $r->isa('Route::User');
-       }
-       my @pc19 = grep { $_ && $_->isa('Route::Node') } @radd;
-       my @pc16 = grep { $_ && $_->isa('Route::User') } @radd;
-       unshift @pc19, $parent if $self->{state} eq 'init92' && $oparent == $parent;
-       $self->route_pc19($pcall, undef, @pc19) if @pc19;
-       $self->route_pc16($pcall, undef, $parent, @pc16) if @pc16;
 }
 
+
 sub handle_93
 {
        my $self = shift;
@@ -1620,21 +1853,30 @@ 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;
@@ -1643,7 +1885,7 @@ sub handle_93
                        return;
                }
        }
-       
+
        # if this is a 'bad spotter' user then ignore it
        my $nossid = $from;
        $nossid =~ s/-\d+$//;
@@ -1652,37 +1894,62 @@ sub handle_93
                return;
        }
 
-       if (is_callsign($to)) {
-               # local talks 
+       # ignore PC93 coming in from outside this node with a target of local
+       if ($to eq 'LOCAL' && $self != $main::me) {
+               dbg("PCPROT: incoming LOCAL chat not from local node, ignored") if isdbg('chanerr');
+               return;
+       }
+
+       # 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 '*' || $to eq 'SYSOP' || $to eq 'WX') {
                # announces
-       } else {
-               # chat messages
+               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, $sysop, $wx, $pcall), $from, $local, $text, $sysop, $pcall, $wx, $via eq 'LOCAL' ? $via : undef);
+               return if $via eq 'LOCAL';
+       } elsif (!is_callsign($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');
        }
-       $self->broadcast_route_pc9x($pcall, undef, $line, 0);
+
+       # broadcast this chat sentence everywhere unless it is targetted to 'LOCAL'
+       $self->broadcast_route_pc9x($pcall, undef, $line, 0) unless $to eq 'LOCAL' || $via eq 'LOCAL';
 }
 
 # if get here then rebroadcast the thing with its Hop count decremented (if
@@ -1700,9 +1967,7 @@ 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)) {