[spider.git] / perl / DXProt.pm

#!/usr/bin/perl
#
# This module impliments the protocal mode for a dx cluster
#
# Copyright (c) 1998 Dirk Koopman G1TLH
#
#
#

package DXProt;

@ISA = qw(DXChannel);

use DXUtil;
use DXChannel;
use DXUser;
use DXM;
use DXProtVars;
use DXCommandmode;
use DXLog;
use Spot;
use DXProtout;
use DXDebug;
use Filter;
use Local;
use DXDb;
use AnnTalk;
use Geomag;
use WCY;
use BadWords;
use DXHash;
use Route;
use Route::Node;
use Script;
use RouteDB;
use DXProtHandle;

use strict;

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
                        $allowzero $decode_dk0wcy $send_opernam @checklist
                        $eph_pc15_restime $pc92_update_period $pc92_obs_timeout
                        %pc92_find $pc92_find_timeout $pc92_short_update_period
                        $next_pc92_obs_timeout $pc92_slug_changes $last_pc92_slug
                   );

$pc11_max_age = 1*3600;                 # the maximum age for an incoming 'real-time' pc11
$pc23_max_age = 1*3600;                 # the maximum age for an incoming 'real-time' pc23

$last_hour = time;                              # last time I did an hourly periodic update
%rcmds = ();                    # outstanding rcmd requests outbound
%nodehops = ();                 # node specific hop control
%pc19list = ();                                 # list of outstanding PC19s that haven't had PC16s on them

$censorpc = 1;                                  # Do a BadWords::check on text fields and reject things
                                                                # loads of 'bad things'
$baddx = new DXHash "baddx";
$badspotter = new DXHash "badspotter";
$badnode = new DXHash "badnode";
$last10 = $last_pc50 = time;
$ann_to_talk = 1;
$eph_restime = 60;
$eph_info_restime = 60*60;
$eph_pc15_restime = 6*60;
$eph_pc34_restime = 30;
$pingint = 5*60;
$obscount = 2;
$chatdupeage = 20 * 60;
$chatimportfn = "$main::root/chat_import";
$investigation_int = 12*60*60;  # time between checks to see if we can see this node
$pc19_version = 5466;                   # the visible version no for outgoing PC19s generated from pc59
$pc92_update_period = 60*60;    # the period between outgoing PC92 C updates
$pc92_short_update_period = 15*60; # shorten the update period after a connection
%pc92_find = ();                                # outstanding pc92 find operations
$pc92_find_timeout = 30;                # maximum time to wait for a reply
#$pc92_obs_timeout = $pc92_update_period; # the time between obscount countdowns
$pc92_obs_timeout = 60*60; # the time between obscount for incoming countdowns
$next_pc92_obs_timeout = $main::systime + 60*60; # the time between obscount countdowns


@checklist =
(
 [ qw(i c c m bp bc c) ],                       # pc10
 [ qw(i f m d t m c c h) ],             # pc11
 [ qw(i c bm m bm bm p h) ],            # pc12
 [ qw(i c h) ],                                 #
 [ qw(i c h) ],                                 #
 [ qw(i c m h) ],                                       #
 undef ,                                                # pc16 has to be validated manually
 [ qw(i c c h) ],                                       # pc17
 [ qw(i m n) ],                                 # pc18
 undef ,                                                # pc19 has to be validated manually
 undef ,                                                # pc20 no validation
 [ qw(i c m h) ],                                       # pc21
 undef ,                                                # pc22 no validation
 [ qw(i d n n n n m c c h) ],           # pc23
 [ qw(i c p h) ],                                       # pc24
 [ qw(i c c n n) ],                             # pc25
 [ qw(i f m d t m c c bc) ],            # pc26
 [ qw(i d n n n n m c c bc) ],  # pc27
 [ qw(i c c m c d t p m bp n p bp bc) ], # pc28
 [ qw(i c c n m) ],                             # pc29
 [ qw(i c c n) ],                                       # pc30
 [ qw(i c c n) ],                                       # pc31
 [ qw(i c c n) ],                                       # pc32
 [ qw(i c c n) ],                                       # pc33
 [ qw(i c c m) ],                                       # pc34
 [ qw(i c c m) ],                                       # pc35
 [ qw(i c c m) ],                                       # pc36
 [ qw(i c c n m) ],                             # pc37
 undef,                                                 # pc38 not interested
 [ qw(i c m) ],                                 # pc39
 [ qw(i c c m p n) ],                           # pc40
 [ qw(i c n m h) ],                             # pc41
 [ qw(i c c n) ],                                       # pc42
 undef,                                                 # pc43 don't handle it
 [ qw(i c c n m m c) ],                 # pc44
 [ qw(i c c n m) ],                             # pc45
 [ qw(i c c n) ],                                       # pc46
 undef,                                                 # pc47
 undef,                                                 # pc48
 [ qw(i c m h) ],                                       # pc49
 [ qw(i c n h) ],                                       # pc50
 [ qw(i c c n) ],                                       # pc51
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,                                                 # pc60
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,                                                 # pc70
 undef,
 undef,
 [ qw(i d n n n n n n m m m c c h) ],   # pc73
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,
 undef,                                                 # pc80
 undef,
 undef,
 undef,
 [ qw(i c c c m) ],                             # pc84
 [ qw(i c c c m) ],                             # pc85
 undef,
 undef,
 undef,
 undef,
 [ qw(i c n) ],                                 # pc90
);

# use the entry in the check list to check the field list presented
# return OK if line NOT in check list (for now)
sub check
{
        my $n = shift;
        $n -= 10;
        return 0 if $n < 0 || $n > @checklist;
        my $ref = $checklist[$n];
        return 0 unless ref $ref;

        my $i;
        for ($i = 1; $i < @$ref; $i++) {
                my ($blank, $act) = $$ref[$i] =~ /^(b?)(\w)$/;
                return 0 unless $act;
                next if $blank && $_[$i] =~ /^[ \*]$/;
                if ($act eq 'c') {
                        return $i unless is_callsign($_[$i]);
                } elsif ($act eq 'i') {
                        ;                                       # do nothing
                } elsif ($act eq 'm') {
                        return $i unless is_pctext($_[$i]);
                } elsif ($act eq 'p') {
                        return $i unless is_pcflag($_[$i]);
                } elsif ($act eq 'f') {
                        return $i unless is_freq($_[$i]);
                } elsif ($act eq 'n') {
                        return $i unless $_[$i] =~ /^[\d ]+$/;
                } elsif ($act eq 'h') {
                        return $i unless $_[$i] =~ /^H\d\d?$/;
                } elsif ($act eq 'd') {
                        return $i unless $_[$i] =~ /^\s*\d+-\w\w\w-[12][90]\d\d$/;
                } elsif ($act eq 't') {
                        return $i unless $_[$i] =~ /^[012]\d[012345]\dZ$/;
                }
        }
        return 0;
}

sub update_pc92_next
{
        my $self = shift;
        my $period = shift || $pc92_update_period;
        $self->{next_pc92_update} = $main::systime + $period - int rand($period / 4);
        dbg("ROUTE: update_pc92_next: $self->{call} " . atime($self->{next_pc92_update})) if isdbg('obscount');
}

sub init
{
        do "$main::data/hop_table.pl" if -e "$main::data/hop_table.pl";
        confess $@ if $@;

        my $user = DXUser->get($main::mycall);
        die "User $main::mycall not setup or disappeared RTFM" unless $user;

        $myprot_version += $main::version*100;
        $main::me = DXProt->new($main::mycall, 0, $user);
        $main::me->{here} = 1;
        $main::me->{state} = "indifferent";
        $main::me->{sort} = 'S';    # S for spider
        $main::me->{priv} = 9;
        $main::me->{metric} = 0;
        $main::me->{pingave} = 0;
        $main::me->{registered} = 1;
        $main::me->{version} = $main::version;
        $main::me->{build} = "$main::subversion.$main::build";
        $main::me->{do_pc9x} = 1;
        $main::me->update_pc92_next($pc92_update_period);
}

#
# obtain a new connection this is derived from dxchannel
#

sub new
{
        my $self = DXChannel::alloc(@_);

        # add this node to the table, the values get filled in later
        my $pkg = shift;
        my $call = shift;

        # if we have an entry already, then send a PC21 to all connect
        # old style connections, because we are about to get the real deal
        if (my $ref = Route::Node::get($call)) {
                dbg("ROUTE: $call is already in the routing table, deleting") if isdbg('route');
                my @rout = $ref->delete;
                $self->route_pc21($main::mycall, undef, @rout) if @rout;
        }
        $main::routeroot->add($call, '5000', Route::here(1)) if $call ne $main::mycall;

        return $self;
}

# this is how a pc connection starts (for an incoming connection)
# issue a PC38 followed by a PC18, then wait for a PC20 (remembering
# all the crap that comes between).
sub start
{
        my ($self, $line, $sort) = @_;
        my $call = $self->{call};
        my $user = $self->{user};

        # log it
        my $host = $self->{conn}->{peerhost};
        $host ||= "AGW Port #$self->{conn}->{agwport}" if exists $self->{conn}->{agwport};
        $host ||= "unknown";

        Log('DXProt', "$call connected from $host");

        # remember type of connection
        $self->{consort} = $line;
        $self->{outbound} = $sort eq 'O';
        my $priv = $user->priv;
        $priv = $user->priv(1) unless $priv;
        $self->{priv} = $priv;     # other clusters can always be 'normal' users
        $self->{lang} = $user->lang || 'en';
        $self->{isolate} = $user->{isolate};
        $self->{consort} = $line;       # save the connection type
        $self->{here} = 1;
        $self->{width} = 80;

        # sort out registration
        $self->{registered} = 1;

        # get the output filters
        $self->{spotsfilter} = Filter::read_in('spots', $call, 0) || Filter::read_in('spots', 'node_default', 0);
        $self->{wwvfilter} = Filter::read_in('wwv', $call, 0) || Filter::read_in('wwv', 'node_default', 0);
        $self->{wcyfilter} = Filter::read_in('wcy', $call, 0) || Filter::read_in('wcy', 'node_default', 0);
        $self->{annfilter} = Filter::read_in('ann', $call, 0) || Filter::read_in('ann', 'node_default', 0) ;
        $self->{routefilter} = Filter::read_in('route', $call, 0) || Filter::read_in('route', 'node_default', 0) unless $self->{isolate} ;


        # get the INPUT filters (these only pertain to Clusters)
        $self->{inspotsfilter} = Filter::read_in('spots', $call, 1) || Filter::read_in('spots', 'node_default', 1);
        $self->{inwwvfilter} = Filter::read_in('wwv', $call, 1) || Filter::read_in('wwv', 'node_default', 1);
        $self->{inwcyfilter} = Filter::read_in('wcy', $call, 1) || Filter::read_in('wcy', 'node_default', 1);
        $self->{inannfilter} = Filter::read_in('ann', $call, 1) || Filter::read_in('ann', 'node_default', 1);
        $self->{inroutefilter} = Filter::read_in('route', $call, 1) || Filter::read_in('route', 'node_default', 1) unless $self->{isolate};
        # if there is no route input filter then specify a default one.
        # obviously this can be changed later by the sysop.
        if (!$self->{inroutefilter}) {
                my $dxcc = $self->dxcc;
                $Route::filterdef->cmd($self, 'route', 'accept', "input by_dxcc $dxcc" );
        }

        # set unbuffered and no echo
        $self->send_now('B',"0");
        $self->send_now('E',"0");
        $self->conn->echo(0) if $self->conn->can('echo');

        # ping neighbour node stuff
        my $ping = $user->pingint;
        $ping = $pingint unless defined $ping;
        $self->{pingint} = $ping;
        $self->{nopings} = $user->nopings || $obscount;
        $self->{pingtime} = [ ];
        $self->{pingave} = 999;
        $self->{metric} ||= 100;
        $self->{lastping} = $main::systime;

        # send initialisation string
        unless ($self->{outbound}) {
                $self->sendinit;
        }

        $self->state('init');
        $self->{pc50_t} = $main::systime;

        # send info to all logged in thingies
        $self->tell_login('loginn');

        # run a script send the output to the debug file
        my $script = new Script(lc $call) || new Script('node_default');
        $script->run($self) if $script;

        # set next_pc92_update time for this node sooner
        $self->update_pc92_next($self->{outbound} ? $pc92_short_update_period : $pc92_update_period);
}

#
# send outgoing 'challenge'
#

sub sendinit
{
        my $self = shift;
        $self->send(pc18(($self->{isolate} || !$self->user->wantpc9x) ? "" : " pc9x"));
}

#
# This is the normal pcxx despatcher
#
sub normal
{
        my ($self, $line) = @_;

        if ($line =~ '^<\w+\s' && $main::do_xml) {
                DXXml::normal($self, $line);
                return;
        }

        my @field = split /\^/, $line;
        return unless @field;

        pop @field if $field[-1] eq '~';

#       print join(',', @field), "\n";


        # process PC frames, this will fail unless the frame starts PCnn
        my ($pcno) = $field[0] =~ /^PC(\d\d)/; # just get the number
        unless (defined $pcno && $pcno >= 10 && $pcno <= 99) {
                dbg("PCPROT: unknown protocol") if isdbg('chanerr');
                return;
        }

        # check for and dump bad protocol messages
        my $n = check($pcno, @field);
        if ($n) {
                dbg("PCPROT: bad field $n, dumped (" . parray($checklist[$pcno-10]) . ")") if isdbg('chanerr');
                return;
        }

        # modify the hop count here
        if ($self != $main::me) {
                if (my ($hops, $trail) = $line =~ /\^H(\d+)(\^?\~?)?$/) {
                        $trail ||= '';
                        $hops--;
                        return if $hops < 0;
                        $line =~ s/\^H(\d+)(\^?\~?)?$/sprintf('^H%d%s', $hops, $trail)/e;
                        $field[-1] = "H$hops";
                }
        }

        # send it out for processing
        my $origin = $self->{call};
        no strict 'subs';
        my $sub = "handle_$pcno";

        if ($self->can($sub)) {
                $self->$sub($pcno, $line, $origin, @field);
        } else {
                $self->handle_default($pcno, $line, $origin, @field);
        }
}

#
# This is called from inside the main cluster processing loop and is used
# for despatching commands that are doing some long processing job
#
sub process
{
        my $t = time;
        my @dxchan = DXChannel::get_all();
        my $dxchan;
        my $pc50s;

        # send out a pc50 on EVERY channel all at once
        if ($t >= $last_pc50 + $DXProt::pc50_interval) {
                $pc50s = pc50($main::me, scalar DXChannel::get_all_users);
                eph_dup($pc50s);
                $last_pc50 = $t;
        }

        foreach $dxchan (@dxchan) {
                next unless $dxchan->is_node;
                next if $dxchan->handle_xml;
                next if $dxchan == $main::me;

                # send the pc50
                $dxchan->send($pc50s) if $pc50s;

                # send a ping out on this channel
                if ($dxchan->{pingint} && $t >= $dxchan->{pingint} + $dxchan->{lastping}) {
                        if ($dxchan->{nopings} <= 0) {
                                $dxchan->disconnect;
                        } else {
                                DXXml::Ping::add($main::me, $dxchan->call);
                                $dxchan->{nopings} -= 1;
                                $dxchan->{lastping} = $t;
                                $dxchan->{lastping} += $dxchan->{pingint} / 2 unless @{$dxchan->{pingtime}};
                        }
                }

        }

        Investigate::process();
        clean_pc92_find();

        # every ten seconds
        if ($t - $last10 >= 10) {
                # clean out ephemera

                eph_clean();
                import_chat();

                if ($main::systime >= $next_pc92_obs_timeout) {
                        time_out_pc92_routes();
                        $next_pc92_obs_timeout = $main::systime + $pc92_obs_timeout;
                }

                $last10 = $t;

                # send out config broadcasts
                foreach $dxchan (@dxchan) {
                        next unless $dxchan->is_node;

                        # send out a PC92 config record if required for me and
                        # all my non pc9x dependent nodes.
                        if ($main::systime >= $dxchan->{next_pc92_update}) {
                                dbg("ROUTE: pc92 broadcast candidate: $dxchan->{call}") if isdbg('obscount');
                                if ($dxchan == $main::me || !$dxchan->{do_pc9x}) {
                                        $dxchan->broadcast_pc92_update($dxchan->{call});
                                        $last_pc92_slug = 0 if $dxchan == $main::me;
                                }
                        }
                }

                if ($pc92_slug_changes && $main::systime >= $last_pc92_slug + $pc92_slug_changes) {
                        my ($add, $del) = gen_pc92_changes();
                        $main::me->route_pc92d($main::mycall, undef, $main::routeroot, @$del) if @$del;
                        $main::me->route_pc92a($main::mycall, undef, $main::routeroot, @$add) if @$add;
                        clear_pc92_changes();
                }
        }

        if ($main::systime - 3600 > $last_hour) {
                $last_hour = $main::systime;
        }
}

#
# finish up a pc context
#

#
# some active measures
#


sub send_dx_spot
{
        my $self = shift;
        my $line = shift;
        my @dxchan = DXChannel::get_all();
        my $dxchan;

        # send it if it isn't the except list and isn't isolated and still has a hop count
        # taking into account filtering and so on
        foreach $dxchan (@dxchan) {
                next if $dxchan == $main::me;
                next if $dxchan == $self && $self->is_node;
                $dxchan->dx_spot($line, $self->{isolate}, @_, $self->{call});
        }
}

sub dx_spot
{
        my $self = shift;
        my $line = shift;
        my $isolate = shift;
        my ($filter, $hops);

        if ($self->{spotsfilter}) {
                ($filter, $hops) = $self->{spotsfilter}->it(@_);
                return unless $filter;
        }
        send_prot_line($self, $filter, $hops, $isolate, $line);
}

sub send_prot_line
{
        my ($self, $filter, $hops, $isolate, $line) = @_;
        my $routeit;


        if ($hops) {
                $routeit = $line;
                $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
        } else {
                $routeit = adjust_hops($self, $line);  # adjust its hop count by node name
                return unless $routeit;
        }
        if ($filter) {
                $self->send($routeit);
        } else {
                $self->send($routeit) unless $self->{isolate} || $isolate;
        }
}


sub send_wwv_spot
{
        my $self = shift;
        my $line = shift;
        my @dxchan = DXChannel::get_all();
        my $dxchan;
        my @dxcc = ((Prefix::cty_data($_[6]))[0..2], (Prefix::cty_data($_[7]))[0..2]);

        # send it if it isn't the except list and isn't isolated and still has a hop count
        # taking into account filtering and so on
        foreach $dxchan (@dxchan) {
                next if $dxchan == $main::me;
                next if $dxchan == $self && $self->is_node;
                my $routeit;
                my ($filter, $hops);

                $dxchan->wwv($line, $self->{isolate}, @_, $self->{call}, @dxcc);
        }
}

sub wwv
{
        my $self = shift;
        my $line = shift;
        my $isolate = shift;
        my ($filter, $hops);

        if ($self->{wwvfilter}) {
                ($filter, $hops) = $self->{wwvfilter}->it(@_[7..$#_]);
                return unless $filter;
        }
        send_prot_line($self, $filter, $hops, $isolate, $line)
}

sub send_wcy_spot
{
        my $self = shift;
        my $line = shift;
        my @dxchan = DXChannel::get_all();
        my $dxchan;
        my @dxcc = ((Prefix::cty_data($_[10]))[0..2], (Prefix::cty_data($_[11]))[0..2]);

        # send it if it isn't the except list and isn't isolated and still has a hop count
        # taking into account filtering and so on
        foreach $dxchan (@dxchan) {
                next if $dxchan == $main::me;
                next if $dxchan == $self;

                $dxchan->wcy($line, $self->{isolate}, @_, $self->{call}, @dxcc);
        }
}

sub wcy
{
        my $self = shift;
        my $line = shift;
        my $isolate = shift;
        my ($filter, $hops);

        if ($self->{wcyfilter}) {
                ($filter, $hops) = $self->{wcyfilter}->it(@_);
                return unless $filter;
        }
        send_prot_line($self, $filter, $hops, $isolate, $line) if $self->is_clx || $self->is_spider || $self->is_dxnet;
}

# send an announce
sub send_announce
{
        my $self = shift;
        my $from_pc9x = shift;
        my $line = shift;
        my @dxchan = DXChannel::get_all();
        my $dxchan;
        my $target = $_[6];
        my $to = 'To ';
        my $text = unpad($_[2]);
        my $from = $_[0];

        if ($_[3] eq '*') {     # sysops
                $target = "SYSOP";
        } elsif ($_[3] gt ' ') { # speciality list handling
                my ($name) = split /\./, $_[3];
                $target = "$name"; # put the rest in later (if bothered)
        }

        if ($_[5] eq '1') {
                $target = "WX";
                $to = '';
        }
        $target = "ALL" if !$target;


        # obtain country codes etc
        my @a = Prefix::cty_data($from);
        my @b = Prefix::cty_data($_[4]);
        if ($self->{inannfilter}) {
                my ($filter, $hops) =
                        $self->{inannfilter}->it(@_, $self->{call},
                                                                         @a[0..2],
                                                                         @b[0..2], $a[3], $b[3]);
                unless ($filter) {
                        dbg("PCPROT: Rejected by input announce filter") if isdbg('chanerr');
                        return;
                }
        }

        # the sysop ('*') thing is an attempt to minimise the damage caused by non-updated PC93 generators
        if (AnnTalk::dup($from, $target, $_[2]) || ($_[3] eq '*' && AnnTalk::dup($from, 'ALL', $_[2]))) {
                my $dxchan = DXChannel::get($from);
                if ($self == $main::me && $dxchan && $dxchan->is_user) {
                        if ($dxchan->priv < 5) {
                                $dxchan->send($dxchan->msg('dup'));
                                return;
                        }
                } else {
                        dbg("PCPROT: Duplicate Announce ignored") if isdbg('chanerr');
                        return;
                }
        }

        Log('ann', $target, $from, $text);

        # send it if it isn't the except list and isn't isolated and still has a hop count
        # taking into account filtering and so on
        foreach $dxchan (@dxchan) {
                next if $dxchan == $main::me;
                next if $dxchan == $self && $self->is_node;
                next if $from_pc9x && $dxchan->{do_pc9x};
                next if $target eq 'LOCAL' && $dxchan->is_node;
                $dxchan->announce($line, $self->{isolate}, $to, $target, $text, @_, $self->{call},
                                                  @a[0..2], @b[0..2]);
        }
}

my $msgid = int rand(1000);

sub nextchatmsgid
{
        $msgid++;
        $msgid = 1 if $msgid > 999;
        return $msgid;
}

# send a chat line
sub send_chat
{
        my $self = shift;
        my $from_pc9x = shift;
        my $line = shift;
        my @dxchan = DXChannel::get_all();
        my $dxchan;
        my $target = $_[3];
        my $text = unpad($_[2]);
        my $ak1a_line;
        my $from = $_[0];

        # munge the group and recast the line if required
        if ($target =~ s/\.LST$//) {
                $ak1a_line = $line;
        }

        # obtain country codes etc
        my @a = Prefix::cty_data($from);
        my @b = Prefix::cty_data($_[4]);
        if ($self->{inannfilter}) {
                my ($filter, $hops) =
                        $self->{inannfilter}->it(@_, $self->{call},
                                                                         @a[0..2],
                                                                         @b[0..2], $a[3], $b[3]);
                unless ($filter) {
                        dbg("PCPROT: Rejected by input announce filter") if isdbg('chanerr');
                        return;
                }
        }

        if (AnnTalk::dup($from, $target, $_[2], $main::systime + $chatdupeage)) {
                my $dxchan = DXChannel::get($from);
                if ($self == $main::me && $dxchan && $dxchan->is_user) {
                        if ($dxchan->priv < 5) {
                                $dxchan->send($dxchan->msg('dup'));
                                return;
                        }
                } else {
                        dbg("PCPROT: Duplicate Announce ignored") if isdbg('chanerr');
                        return;
                }
        }


        Log('chat', $target, $from, $text);

        # send it if it isn't the except list and isn't isolated and still has a hop count
        # taking into account filtering and so on
        foreach $dxchan (@dxchan) {
                my $is_ak1a = $dxchan->is_ak1a;

                if ($dxchan->is_node) {
                        next if $dxchan == $main::me;
                        next if $dxchan == $self;
                        next if $from_pc9x && $dxchan->{do_pc9x};
                        next unless $dxchan->is_spider || $is_ak1a;
                        next if $target eq 'LOCAL';
                        if (!$ak1a_line && $is_ak1a) {
                                $ak1a_line = pc12($_[0], $text, $_[1], "$target.LST");
                        }
                }

                $dxchan->chat($is_ak1a ? $ak1a_line : $line, $self->{isolate}, $target, $_[1],
                                          $text, @_, $self->{call}, @a[0..2], @b[0..2]);
        }
}

sub announce
{
        my $self = shift;
        my $line = shift;
        my $isolate = shift;
        my $to = shift;
        my $target = shift;
        my $text = shift;
        my ($filter, $hops);

        if ($self->{annfilter}) {
                ($filter, $hops) = $self->{annfilter}->it(@_);
                return unless $filter;
        }
        send_prot_line($self, $filter, $hops, $isolate, $line) unless $_[1] eq $main::mycall;
}

sub chat
{
        my $self = shift;
        my $line = shift;
        my $isolate = shift;
        my $to = shift;
        my $target = shift;
        my $text = shift;
        my ($filter, $hops);

        if ($self->{annfilter}) {
                ($filter, $hops) = $self->{annfilter}->it(@_);
                return unless $filter;
        }
        if (($self->is_spider || $self->is_ak1a) && $_[1] ne $main::mycall) {
                send_prot_line($self, $filter, $hops, $isolate, $line);
        }
}


sub send_local_config
{
        my $self = shift;

        dbg('DXProt::send_local_config') if isdbg('trace');

        # send our nodes
        my $node;
        my @nodes;
        my @localnodes;
        my @remotenodes;

        if ($self->{isolate}) {
                dbg("send_local_config: isolated");
                @localnodes = ( $main::routeroot );
                $self->send_route($main::mycall, \&pc19, 1, $main::routeroot);
        } elsif ($self->{do_pc9x}) {
                dbg("send_local_config: doing pc9x");
                my $node = Route::Node::get($self->{call});
                $self->send_last_pc92_config($main::routeroot);
                $self->send(pc92a($main::routeroot, $node)) unless $main::routeroot->last_PC92C =~ /$self->{call}/;
        } else {
                # create a list of all the nodes that are not connected to this connection
                # and are not themselves isolated, this to make sure that isolated nodes
                # don't appear outside of this node

                dbg("send_local_config: traditional");

                # send locally connected nodes
                my @dxchan = grep { $_->call ne $main::mycall && $_ != $self && !$_->{isolate} } DXChannel::get_all_nodes();
                @localnodes = map { my $r = Route::Node::get($_->{call}); $r ? $r : () } @dxchan if @dxchan;
                $self->send_route($main::mycall, \&pc19, scalar(@localnodes)+1, $main::routeroot, @localnodes);

                my $node;
                my @rawintcalls = map { $_->nodes } @localnodes if @localnodes;
                my @intcalls;
                foreach $node (@rawintcalls) {
                        push @intcalls, $node if grep $_ && $node != $_, @intcalls;
                }
                my $ref = Route::Node::get($self->{call});
                my @rnodes = $ref->nodes;
                foreach $node (@intcalls) {
                        push @remotenodes, Route::Node::get($node) if grep $_ && $node != $_, @rnodes, @remotenodes;
                }
                $self->send_route($main::mycall, \&pc19, scalar(@remotenodes), @remotenodes);
        }

        # get all the users connected on the above nodes and send them out
        unless ($self->{do_pc9x}) {
                foreach $node ($main::routeroot, @localnodes, @remotenodes) {
                        if ($node) {
                                my @rout = map {my $r = Route::User::get($_); $r ? ($r) : ()} $node->users;
                                $self->send_route($main::mycall, \&pc16, 1, $node, @rout) if @rout && $self->user->wantsendpc16;
                        } else {
                                dbg("sent a null value") if isdbg('chanerr');
                        }
                }
        }
}

sub gen_my_pc92_config
{
        my $node = shift;

        if ($node->{call} eq $main::mycall) {
                clear_pc92_changes();           # remove any slugged data, we are generating it as now
                my @dxchan = grep { $_->call ne $main::mycall && !$_->{isolate} } DXChannel::get_all();
                dbg("ROUTE: all dxchan: " . join(',', map{$_->{call}} @dxchan)) if isdbg('routelow');
                my @localnodes = map { my $r = Route::get($_->{call}); $r ? $r : () } @dxchan;
                dbg("ROUTE: localnodes: " . join(',', map{$_->{call}} @localnodes)) if isdbg('routelow');
                return pc92c($node, @localnodes);
        } else {
                my @rout = map {my $r = Route::User::get($_); $r ? ($r) : ()} $node->users;
                return pc92c($node, @rout);
        }
}

sub send_last_pc92_config
{
        my $self = shift;
        my $node = shift;
        if (my $l = $node->last_PC92C) {
                $self->send($l);
        } else {
                $self->send_pc92_config($node);
        }
}

sub send_pc92_config
{
        my $self = shift;
        my $node = shift;

        dbg('DXProt::send_pc92_config') if isdbg('trace');

        $node->last_PC92C(gen_my_pc92_config($node));
        $self->send($node->last_PC92C);
}

sub broadcast_pc92_update
{
        my $self = shift;
        my $call = shift;

        dbg("ROUTE: broadcast_pc92_update $call") if isdbg('obscount');

        my $nref = Route::Node::get($call);
        unless ($nref) {
                dbg("ERROR: broadcast_pc92_update - Route::Node $call disappeared");
                return;
        }
        my $l = $nref->last_PC92C(gen_my_pc92_config($nref));
        $main::me->broadcast_route_pc9x($main::mycall, undef, $l, 0);
        $self->update_pc92_next($pc92_update_period);
}

sub time_out_pc92_routes
{
        my @nodes = grep {$_->call ne $main::mycall && ($_->do_pc9x || $_->via_pc92)} Route::Node::get_all();
        my @rdel;
        foreach my $n (@nodes) {
                my $o = $n->dec_obs;
                if ($o <= 0) {
                        if (my $dxchan = DXChannel::get($n->call)) {
                                dbg("ROUTE: disconnecting local pc92 $dxchan->{call} on obscount") if isdbg('obscount');
                                $dxchan->disconnect;
                                next;
                        }
                        my @parents = map {Route::Node::get($_)} $n->parents;
                        for (@parents) {
                                if ($_) {
                                        dbg("ROUTE: deleting pc92 $_->{call} from $n->{call} on obscount")  if isdbg('obscount');
                                        push @rdel, $n->del($_);
                                }
                        }
                } else {
                        dbg("ROUTE: obscount on $n->{call} now $o") if isdbg('obscount');
                }
        }
        for (@rdel) {
                $main::me->route_pc21($main::mycall, undef, $_) if $_;
        }
}

#
# route a message down an appropriate interface for a callsign
#
# is called route(to, pcline);
#

sub route
{
        my ($self, $call, $line) = @_;

        if (ref $self && $call eq $self->{call}) {
                dbg("PCPROT: Trying to route back to source, dropped") if isdbg('chanerr');
                return;
        }

        # always send it down the local interface if available
        my $dxchan = DXChannel::get($call);
        if ($dxchan) {
                dbg("route: $call -> $dxchan->{call} direct" ) if isdbg('route');
        } else {
                my $cl = Route::get($call);
                $dxchan = $cl->dxchan if $cl;
                if (ref $dxchan) {
                        if (ref $self && $dxchan eq $self) {
                                dbg("PCPROT: Trying to route back to source, dropped") if isdbg('chanerr');
                                return;
                        }
                        dbg("route: $call -> $dxchan->{call} using normal route" ) if isdbg('route');
                }
        }

        # try the backstop method
        unless ($dxchan) {
                my $rcall = RouteDB::get($call);
                if ($rcall) {
                        if ($self && $rcall eq $self->{call}) {
                                dbg("PCPROT: Trying to route back to source, dropped") if isdbg('chanerr');
                                return;
                        }
                        $dxchan = DXChannel::get($rcall);
                        dbg("route: $call -> $rcall using RouteDB" ) if isdbg('route') && $dxchan;
                }
        }

        if ($dxchan) {
                my $routeit = adjust_hops($dxchan, $line);   # adjust its hop count by node name
                if ($routeit) {
                        $dxchan->send($routeit) unless $dxchan == $main::me;
                }
        } else {
                dbg("PCPROT: No route available, dropped") if isdbg('chanerr');
        }
}

#
# obtain the hops from the list for this callsign and pc no
#

sub get_hops
{
        my $pcno = shift;
        my $hops = $DXProt::hopcount{$pcno};
        $hops = $DXProt::def_hopcount if !$hops;
        return "H$hops";
}

#
# adjust the hop count on a per node basis using the user loadable
# hop table if available or else decrement an existing one
#

sub adjust_hops
{
        my $self = shift;
        my $s = shift;
        my $call = $self->{call};
        my $hops;

        if (($hops) = $s =~ /\^H([-\d]+)\^?~?$/o) {
                my ($pcno) = $s =~ /^PC(\d\d)/o;
                confess "$call called adjust_hops with '$s'" unless $pcno;
                my $ref = $nodehops{$call} if %nodehops;
                if ($ref) {
                        my $newhops = $ref->{$pcno};
                        return "" if defined $newhops && $newhops == 0;
                        $newhops = $ref->{default} unless $newhops;
                        return "" if defined $newhops && $newhops == 0;
                        $newhops = $hops unless $newhops;
                        return "" unless $newhops > 0;
                        $s =~ s/\^H(\d+)(\^~?)$/\^H$newhops$2/ if $newhops != $hops;
                } else {
                        return "" unless $hops > 0;
                }
        }
        return $s;
}

#
# load hop tables
#
sub load_hops
{
        my $self = shift;
        return $self->msg('lh1') unless -e "$main::data/hop_table.pl";
        do "$main::data/hop_table.pl";
        return $@ if $@;
        return ();
}

sub process_rcmd
{
        my ($self, $tonode, $fromnode, $user, $cmd) = @_;
        if ($tonode eq $main::mycall) {
                my $ref = DXUser->get_current($fromnode);
                my $cref = Route::Node::get($fromnode);
                Log('rcmd', 'in', $ref->{priv}, $fromnode, $cmd);
                if ($cmd !~ /^\s*rcmd/i && $cref && $ref && $cref->call eq $ref->homenode) { # not allowed to relay RCMDS!
                        if ($ref->{priv}) {             # you have to have SOME privilege, the commands have further filtering
                                $self->{remotecmd} = 1; # for the benefit of any command that needs to know
                                my $oldpriv = $self->{priv};
                                $self->{priv} = $ref->{priv}; # assume the user's privilege level
                                my @in = (DXCommandmode::run_cmd($self, $cmd));
                                $self->{priv} = $oldpriv;
                                $self->send_rcmd_reply($main::mycall, $fromnode, $user, @in);
                                delete $self->{remotecmd};
                        } else {
                                $self->send_rcmd_reply($main::mycall, $fromnode, $user, "sorry...!");
                        }
                } else {
                        $self->send_rcmd_reply($main::mycall, $fromnode, $user, "your attempt is logged, Tut tut tut...!");
                }
        } else {
                my $ref = DXUser->get_current($tonode);
                if ($ref && $ref->is_clx) {
                        $self->route($tonode, pc84($fromnode, $tonode, $user, $cmd));
                } else {
                        $self->route($tonode, pc34($fromnode, $tonode, $cmd));
                }
        }
}

sub process_rcmd_reply
{
        my ($self, $tonode, $fromnode, $user, $line) = @_;
        if ($tonode eq $main::mycall) {
                my $s = $rcmds{$fromnode};
                if ($s) {
                        my $dxchan = DXChannel::get($s->{call});
                        my $ref = $user eq $tonode ? $dxchan : (DXChannel::get($user) || $dxchan);
                        $ref->send($line) if $ref;
                        delete $rcmds{$fromnode} if !$dxchan;
                } else {
                        # send unsolicited ones to the sysop
                        my $dxchan = DXChannel::get($main::myalias);
                        $dxchan->send($line) if $dxchan;
                }
        } else {
                my $ref = DXUser->get_current($tonode);
                if ($ref && $ref->is_clx) {
                        $self->route($tonode, pc85($fromnode, $tonode, $user, $line));
                } else {
                        $self->route($tonode, pc35($fromnode, $tonode, $line));
                }
        }
}

sub send_rcmd_reply
{
        my $self = shift;
        my $tonode = shift;
        my $fromnode = shift;
        my $user = shift;
        while (@_) {
                my $line = shift;
                $line =~ s/\s*$//;
                Log('rcmd', 'out', $fromnode, $line);
                if ($self->is_clx) {
                        $self->send(pc85($main::mycall, $fromnode, $user, "$main::mycall:$line"));
                } else {
                        $self->send(pc35($main::mycall, $fromnode, "$main::mycall:$line"));
                }
        }
}

# add a rcmd request to the rcmd queues
sub addrcmd
{
        my ($self, $to, $cmd) = @_;

        my $r = {};
        $r->{call} = $self->{call};
        $r->{t} = $main::systime;
        $r->{cmd} = $cmd;
        $rcmds{$to} = $r;

        my $ref = Route::Node::get($to);
        my $dxchan = $ref->dxchan;
        if ($dxchan && $dxchan->is_clx) {
                route(undef, $to, pc84($main::mycall, $to, $self->{call}, $cmd));
        } else {
                route(undef, $to, pc34($main::mycall, $to, $cmd));
        }
}

sub disconnect
{
        my $self = shift;
        my $pc39flag = shift;
        my $call = $self->call;

        return if $self->{disconnecting}++;

        unless ($pc39flag && $pc39flag == 1) {
                $self->send_now("D", DXProt::pc39($main::mycall, $self->msg('disc1', "System Op")));
        }

        # get rid of any PC16/17/19
        eph_del_regex("^PC1[679]*$call");

        # do routing stuff, remove me from routing table
        my $node = Route::Node::get($call);

        RouteDB::delete_interface($call);

        # unbusy and stop and outgoing mail
        my $mref = DXMsg::get_busy($call);
        $mref->stop_msg($call) if $mref;

        # remove outstanding pings
        delete $pings{$call};

        # I was the last node visited
    $self->user->node($main::mycall);

        # send info to all logged in thingies
        $self->tell_login('logoutn');

        Log('DXProt', $call . " Disconnected");

        $self->SUPER::disconnect;

        # here we determine what needs to go out of the routing table
        my @rout;
        if ($node && $pc39flag != 2) {
                dbg('%Route::Node::List = ' . join(',', sort keys %Route::Node::list)) if isdbg('routedisc');

                @rout = $node->del($main::routeroot);

                dbg('@rout = ' . join(',', sort map {$_->call} @rout)) if isdbg('routedisc');

                # now we need to see what can't be routed anymore and came
                # in via this node (probably).
                my $n = 0;
                while ($n != @rout) {
                        $n = @rout;
                        for (Route::Node::get_all()) {
                                unless ($_->dxchan) {
                                        push @rout, $_->delete;
                                }
                        }
                        dbg('@rout = ' . join(',', sort map {$_->call} @rout)) if isdbg('routedisc');
                }

                dbg('%Route::Node::List = ' . join(',', sort keys %Route::Node::list)) if isdbg('routedisc');

                # and all my ephemera as well
                for (@rout) {
                        my $c = $_->call;
                        eph_del_regex("^PC1[679].*$c");
                }
        }

        # broadcast to all other nodes that all the nodes connected to via me are gone
        unless ($pc39flag && $pc39flag == 2)  {
                $self->route_pc21($main::mycall, undef, @rout) if @rout;
                $self->route_pc92d($main::mycall, undef, $main::routeroot, $node) if $node;
        }
}


#
# send a talk message to this thingy
#
sub talk
{
        my ($self, $from, $to, $via, $line, $origin) = @_;

        if ($self->{do_pc9x}) {
                $self->send(pc93($to, $from, $via, $line));
        } else {
                $self->send(pc10($from, $to, $via, $line, $origin));
        }
        Log('talk', $to, $from, '>' . ($via || $origin || $self->call), $line) unless $origin && $origin ne $main::mycall;
}

# send it if it isn't the except list and isn't isolated and still has a hop count
# taking into account filtering and so on

sub send_route
{
        my $self = shift;
        my $origin = shift;
        my $generate = shift;
        my $no = shift;     # the no of things to filter on
        my $routeit;
        my ($filter, $hops);
        my @rin;

        for (; @_ && $no; $no--) {
                my $r = shift;

                # don't send messages with $self's call in back to them
                if ($r->call eq $self->{call}) {
                        dbg("PCPROT: trying to send $self->{call} back itself") if isdbg('chanerr');
                        next;
                }

                if (!$self->{isolate} && $self->{routefilter}) {
                        $filter = undef;
                        if ($r) {
                                ($filter, $hops) = $self->{routefilter}->it($self->{call}, $self->{dxcc}, $self->{itu}, $self->{cq}, $r->call, $r->dxcc, $r->itu, $r->cq, $self->{state}, $r->{state});
                                if ($filter) {
                                        push @rin, $r;
                                } else {
                                        dbg("PCPROT: $self->{call}/" . $r->call . " rejected by output filter") if isdbg('filter');
                                }
                        } else {
                                dbg("was sent a null value") if isdbg('chanerr');
                        }
                } else {
                        push @rin, $r unless $self->{isolate} && $r->call ne $main::mycall;
                }
        }
        if (@rin) {
                foreach my $line (&$generate(@rin, @_)) {
                        if ($hops) {
                                $routeit = $line;
                                $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
                        } else {
                                $routeit = adjust_hops($self, $line);  # adjust its hop count by node name
                                next unless $routeit;
                        }

                        $self->send($routeit);
                }
        }
}

# broadcast everywhere
sub broadcast_route
{
        my $self = shift;
        my $origin = shift;
        my $generate = shift;
        my $line = shift;
        my @dxchan = DXChannel::get_all_nodes();
        my $dxchan;

        if ($line) {
                $line =~ /\^H(\d+)\^?\~?$/;
                return unless $1 > 0;
        }
        unless ($self->{isolate}) {
                foreach $dxchan (@dxchan) {
                        next if $dxchan == $self || $dxchan == $main::me;
                        next if $origin eq $dxchan->{call};     # don't route some from this call back again.
                        next unless $dxchan->isa('DXProt');

                        $dxchan->send_route($origin, $generate, @_);
                }
        }
}

# broadcast to non-pc9x nodes
sub broadcast_route_nopc9x
{
        my $self = shift;
        my $origin = shift;
        my $generate = shift;
        my $line = shift;
        my @dxchan = DXChannel::get_all_nodes();
        my $dxchan;

        if ($line) {
                $line =~ /\^H(\d+)\^?\~?$/;
                return unless $1 > 0;
        }
        unless ($self->{isolate}) {
                foreach $dxchan (@dxchan) {
                        next if $dxchan == $self || $dxchan == $main::me;
                        next if $origin eq $dxchan->{call};     # don't route some from this call back again.
                        next unless $dxchan->isa('DXProt');
                        next if $dxchan->{do_pc9x};
                        if ($generate == \&pc16 || $generate==\&pc17) {
                                next unless $dxchan->user->wantsendpc16;
                        }
                        $dxchan->send_route($origin, $generate, @_);
                }
        }
}

# this is only used for next door nodes on init
sub send_route_pc92
{
        my $self = shift;

        return unless $self->{do_pc9x};

        my $origin = shift;
        my $generate = shift;
        my $no = shift;     # the no of things to filter on
        my $line;

        $line = &$generate(@_);
        $self->send($line);
}

# broadcast only to pc9x nodes
sub broadcast_route_pc9x
{
        my $self = shift;
        my $origin = shift;
        my $generate = shift;
        my $line = shift;
        my $no = shift;
        my @dxchan = DXChannel::get_all_nodes();
        my $dxchan;

        if ($origin eq $main::mycall && $generate && !$line) {
                $line = &$generate(@_);
        }

        $line =~ /\^H(\d+)\^\~?$/;
        unless ($1 > 0 && $self->{isolate}) {
                foreach $dxchan (@dxchan) {
                        next if $dxchan == $self || $dxchan == $main::me;
                        next if $origin eq $dxchan->{call};     # don't route some from this call back again.
                        next unless $dxchan->isa('DXProt');
                        next unless $dxchan->{do_pc9x};

                        $dxchan->send($line);
                }
        }
}

sub route_pc16
{
        my $self = shift;
        return unless $self->user->wantpc16;
        my $origin = shift;
        my $line = shift;
        broadcast_route_nopc9x($self, $origin, \&pc16, $line, 1, @_);
}

sub route_pc17
{
        my $self = shift;
        return unless $self->user->wantpc16;
        my $origin = shift;
        my $line = shift;
        broadcast_route_nopc9x($self, $origin, \&pc17, $line, 1, @_);
}

sub route_pc19
{
        my $self = shift;
        my $origin = shift;
        my $line = shift;
        broadcast_route_nopc9x($self, $origin, \&pc19, $line, scalar @_, @_);
}

sub route_pc21
{
        my $self = shift;
        my $origin = shift;
        my $line = shift;
        broadcast_route_nopc9x($self, $origin, \&pc21, $line, scalar @_, @_);
}

sub route_pc24
{
        my $self = shift;
        my $origin = shift;
        my $line = shift;
        broadcast_route($self, $origin, \&pc24, $line, 1, @_);
}

sub route_pc41
{
        my $self = shift;
        my $origin = shift;
        my $line = shift;
        broadcast_route($self, $origin, \&pc41, $line, 1, @_);
}

sub route_pc50
{
        my $self = shift;
        my $origin = shift;
        my $line = shift;
        broadcast_route($self, $origin, \&pc50, $line, 1, @_);
}

sub route_pc92c
{
        my $self = shift;
        my $origin = shift;
        my $line = shift;
        broadcast_route_pc9x($self, $origin, \&pc92c, $line, 1, @_);
}

sub route_pc92a
{
        my $self = shift;
        my $origin = shift;
        my $line = shift;
        broadcast_route_pc9x($self, $origin, \&pc92a, $line, 1, @_);
}

sub route_pc92d
{
        my $self = shift;
        my $origin = shift;
        my $line = shift;
        broadcast_route_pc9x($self, $origin, \&pc92d, $line, 1, @_);
}

sub in_filter_route
{
        my $self = shift;
        my $r = shift;
        my ($filter, $hops) = (1, 1);

        if ($self->{inroutefilter}) {
                ($filter, $hops) = $self->{inroutefilter}->it($self->{call}, $self->{dxcc}, $self->{itu}, $self->{cq}, $r->call, $r->dxcc, $r->itu, $r->cq, $self->state, $r->state);
                dbg("PCPROT: $self->{call}/" . $r->call . ' rejected by in_filter_route') if !$filter && isdbg('chanerr');
        }
        return $filter;
}

sub eph_dup
{
        my $s = shift;
        my $t = shift || $eph_restime;
        my $r;

        # chop the end off
        $s =~ s/\^H\d\d?\^?\~?$//;
        $r = 1 if exists $eph{$s};    # pump up the dup if it keeps circulating
        $eph{$s} = $main::systime + $t;
        dbg("PCPROT: emphemeral duplicate") if $r && isdbg('chanerr');
        return $r;
}

sub eph_del_regex
{
        my $regex = shift;
        my ($key, $val);
        while (($key, $val) = each %eph) {
                if ($key =~ m{$regex}) {
                        delete $eph{$key};
                }
        }
}

sub eph_clean
{
        my ($key, $val);

        while (($key, $val) = each %eph) {
                if ($main::systime >= $val) {
                        delete $eph{$key};
                }
        }
}

sub eph_list
{
        my ($key, $val);
        my @out;

        while (($key, $val) = each %eph) {
                push @out, $key, $val;
        }
        return @out;
}

sub run_cmd
{
        goto &DXCommandmode::run_cmd;
}


# import any msgs in the chat directory
# the messages are sent to the chat group which forms the
# the first part of the name (eg: solar.1243.txt would be
# sent to chat group SOLAR)
#
# Each message found is sent: one non-blank line to one chat
# message. So 4 lines = 4 chat messages.
#
# The special name LOCAL is for local users ANN
# The special name ALL is for ANN/FULL
# The special name SYSOP is for ANN/SYSOP
#
sub import_chat
{
        # are there any to do in this directory?
        return unless -d $chatimportfn;
        unless (opendir(DIR, $chatimportfn)) {
                dbg("can\'t open $chatimportfn $!") if isdbg('msg');
                Log('msg', "can\'t open $chatimportfn $!");
                return;
        }

        my @names = readdir(DIR);
        closedir(DIR);
        my $name;
        foreach $name (@names) {
                next if $name =~ /^\./;
                my $splitit = $name =~ /^split/;
                my $fn = "$chatimportfn/$name";
                next unless -f $fn;
                unless (open(MSG, $fn)) {
                        dbg("can\'t open import file $fn $!") if isdbg('msg');
                        Log('msg', "can\'t open import file $fn $!");
                        unlink($fn);
                        next;
                }
                my @msg = map { s/\r?\n$//; $_ } <MSG>;
                close(MSG);
                unlink($fn);

                my @cat = split /\./, $name;
                my $target = uc $cat[0];

                foreach my $text (@msg) {
                        next unless $text && $text !~ /^\s*#/;
                        if ($target eq 'ALL' || $target eq 'LOCAL' || $target eq 'SYSOP' || $target eq 'WX') {
                                my $sysop = uc $target eq 'SYSOP' ? '*' : ' ';
                                my $wx = uc $target eq 'WX' ? '1' : '0';
                                my $via = $target;
                                $via = '*' if $target eq 'ALL' || $target eq 'SYSOP';
                                Log('ann', $target, $main::mycall, $text);
                                $main::me->normal(DXProt::pc93($target, $main::mycall, $via, $text));
                        } else {
                                DXCommandmode::send_chats($main::me, $target, $text);
                        }
                }
        }
}

# start a pc92 find operation
sub start_pc92_find
{
        my $dxchan = shift;
        my $target = shift;
        my $key = "$dxchan->{call}|$target";
        if ($pc92_find{$key}) {

        }
}

# function (not method) to handle pc92 find returns
sub handle_pc92_find_reply
{
        my ($dxchan, $node, $from, $target, $flag, $ms) = @_;

        $dxchan->print_pc92_find_reply($node, $target, $flag, $ms) if $dxchan->can('print_pc92_find_return');
}

sub clean_pc92_find
{

}
1;
__END__