perl/DXProt.pm

   1 #!/usr/bin/perl
   2 #
   3 # This module impliments the protocal mode for a dx cluster
   4 #
   5 # Copyright (c) 1998 Dirk Koopman G1TLH
   6 #
   7 # $Id$
   8 #
   9
  10 package DXProt;
  11
  12 @ISA = qw(DXChannel);
  13
  14 use DXUtil;
  15 use DXChannel;
  16 use DXUser;
  17 use DXM;
  18 use DXProtVars;
  19 use DXCommandmode;
  20 use DXLog;
  21 use Spot;
  22 use DXProtout;
  23 use DXDebug;
  24 use Filter;
  25 use Local;
  26 use DXDb;
  27 use AnnTalk;
  28 use Geomag;
  29 use WCY;
  30 use Time::HiRes qw(gettimeofday tv_interval);
  31 use BadWords;
  32 use DXHash;
  33 use Route;
  34 use Route::Node;
  35 use Script;
  36
  37 use strict;
  38
  39 use vars qw($VERSION $BRANCH);
  40 $VERSION = sprintf( "%d.%03d", q$Revision$ =~ /(\d+)\.(\d+)/ );
  41 $BRANCH = sprintf( "%d.%03d", q$Revision$ =~ /\d+\.\d+\.(\d+)\.(\d+)/ ) || 0;
  42 $main::build += $VERSION;
  43 $main::branch += $BRANCH;
  44
  45 use vars qw($pc11_max_age $pc23_max_age $last_pc50 $eph_restime $eph_info_restime $eph_pc34_restime
  46                         $last_hour $last10 %eph  %pings %rcmds $ann_to_talk
  47                         %nodehops $baddx $badspotter $badnode $censorpc $rspfcheck
  48                         $allowzero $decode_dk0wcy $send_opernam @checklist);
  49
  50 $pc11_max_age = 1*3600;                 # the maximum age for an incoming 'real-time' pc11
  51 $pc23_max_age = 1*3600;                 # the maximum age for an incoming 'real-time' pc23
  52
  53 $last_hour = time;                              # last time I did an hourly periodic update
  54 %pings = ();                    # outstanding ping requests outbound
  55 %rcmds = ();                    # outstanding rcmd requests outbound
  56 %nodehops = ();                 # node specific hop control
  57 $censorpc = 1;                                  # Do a BadWords::check on text fields and reject things
  58                                                                 # loads of 'bad things'
  59 $baddx = new DXHash "baddx";
  60 $badspotter = new DXHash "badspotter";
  61 $badnode = new DXHash "badnode";
  62 $last10 = $last_pc50 = time;
  63 $ann_to_talk = 1;
  64 $rspfcheck = 1;
  65 $eph_restime = 180;
  66 $eph_info_restime = 60*60;
  67 $eph_pc34_restime = 30;
  68
  69 @checklist =
  70 (
  71  [ qw(c c m bp bc c) ],                 # pc10
  72  [ qw(f m d t m c c h) ],               # pc11
  73  [ qw(c bc m bp bm p h) ],              # pc12
  74  [ qw(c h) ],                                   #
  75  [ qw(c h) ],                                   #
  76  [ qw(c m h) ],                                 #
  77  undef ,                                                # pc16 has to be validated manually
  78  [ qw(c c h) ],                                 # pc17
  79  [ qw(m n) ],                                   # pc18
  80  undef ,                                                # pc19 has to be validated manually
  81  undef ,                                                # pc20 no validation
  82  [ qw(c m h) ],                                 # pc21
  83  undef ,                                                # pc22 no validation
  84  [ qw(d n n n n m c c h) ],             # pc23
  85  [ qw(c p h) ],                                 # pc24
  86  [ qw(c c n n) ],                               # pc25
  87  [ qw(f m d t m c c bc) ],              # pc26
  88  [ qw(d n n n n m c c bc) ],    # pc27
  89  [ qw(c c m c d t p m bp n p bp bc) ], # pc28
  90  [ qw(c c n m) ],                               # pc29
  91  [ qw(c c n) ],                                 # pc30
  92  [ qw(c c n) ],                                 # pc31
  93  [ qw(c c n) ],                                 # pc32
  94  [ qw(c c n) ],                                 # pc33
  95  [ qw(c c m) ],                                 # pc34
  96  [ qw(c c m) ],                                 # pc35
  97  [ qw(c c m) ],                                 # pc36
  98  [ qw(c c n m) ],                               # pc37
  99  undef,                                                 # pc38 not interested
 100  [ qw(c m) ],                                   # pc39
 101  [ qw(c c m p n) ],                             # pc40
 102  [ qw(c n m h) ],                               # pc41
 103  [ qw(c c n) ],                                 # pc42
 104  undef,                                                 # pc43 don't handle it
 105  [ qw(c c n m m c) ],                   # pc44
 106  [ qw(c c n m) ],                               # pc45
 107  [ qw(c c n) ],                                 # pc46
 108  undef,                                                 # pc47
 109  undef,                                                 # pc48
 110  [ qw(c m h) ],                                 # pc49
 111  [ qw(c n h) ],                                 # pc50
 112  [ qw(c c n) ],                                 # pc51
 113  undef,
 114  undef,
 115  undef,
 116  undef,
 117  undef,
 118  undef,
 119  undef,
 120  undef,
 121  undef,                                                 # pc60
 122  undef,
 123  undef,
 124  undef,
 125  undef,
 126  undef,
 127  undef,
 128  undef,
 129  undef,
 130  undef,
 131  undef,                                                 # pc70
 132  undef,
 133  undef,
 134  [ qw(d n n n n n n m m m c c h) ],     # pc73
 135  undef,
 136  undef,
 137  undef,
 138  undef,
 139  undef,
 140  undef,
 141  undef,                                                 # pc80
 142  undef,
 143  undef,
 144  undef,
 145  [ qw(c c c m) ],                               # pc84
 146  [ qw(c c c m) ],                               # pc85
 147 );
 148
 149 # use the entry in the check list to check the field list presented
 150 # return OK if line NOT in check list (for now)
 151 sub check
 152 {
 153         my $n = shift;
 154         $n -= 10;
 155         return 0 if $n < 0 || $n > @checklist;
 156         my $ref = $checklist[$n];
 157         return 0 unless ref $ref;
 158
 159         my $i;
 160         shift;    # not interested in the first field
 161         for ($i = 0; $i < @$ref; $i++) {
 162                 my ($blank, $act) = $$ref[$i] =~ /^(b?)(\w)$/;
 163                 return 0 unless $act;
 164                 next if $blank && $_[$i] =~ /^[ \*]$/;
 165                 if ($act eq 'c') {
 166                         return $i+1 unless is_callsign($_[$i]);
 167                 } elsif ($act eq 'm') {
 168                         return $i+1 unless is_pctext($_[$i]);
 169                 } elsif ($act eq 'p') {
 170                         return $i+1 unless is_pcflag($_[$i]);
 171                 } elsif ($act eq 'f') {
 172                         return $i+1 unless is_freq($_[$i]);
 173                 } elsif ($act eq 'n') {
 174                         return $i+1 unless $_[$i] =~ /^[\d ]+$/;
 175                 } elsif ($act eq 'h') {
 176                         return $i+1 unless $_[$i] =~ /^H\d\d?$/;
 177                 } elsif ($act eq 'd') {
 178                         return $i+1 unless $_[$i] =~ /^\s*\d+-\w\w\w-[12][90]\d\d$/;
 179                 } elsif ($act eq 't') {
 180                         return $i+1 unless $_[$i] =~ /^[012]\d[012345]\dZ$/;
 181                 }
 182         }
 183         return 0;
 184 }
 185
 186 sub init
 187 {
 188         my $user = DXUser->get($main::mycall);
 189         $DXProt::myprot_version += $main::version*100;
 190         $main::me = DXProt->new($main::mycall, 0, $user);
 191         $main::me->{here} = 1;
 192         $main::me->{state} = "indifferent";
 193         do "$main::data/hop_table.pl" if -e "$main::data/hop_table.pl";
 194         confess $@ if $@;
 195         $main::me->{sort} = 'S';    # S for spider
 196         $main::me->{priv} = 9;
 197         $main::me->{metric} = 0;
 198         $main::me->{pingave} = 0;
 199
 200 #       $Route::Node::me->adddxchan($main::me);
 201 }
 202
 203 #
 204 # obtain a new connection this is derived from dxchannel
 205 #
 206
 207 sub new
 208 {
 209         my $self = DXChannel::alloc(@_);
 210
 211         # add this node to the table, the values get filled in later
 212         my $pkg = shift;
 213         my $call = shift;
 214         $main::routeroot->add($call, '5000', Route::here(1)) if $call ne $main::mycall;
 215
 216         return $self;
 217 }
 218
 219 # this is how a pc connection starts (for an incoming connection)
 220 # issue a PC38 followed by a PC18, then wait for a PC20 (remembering
 221 # all the crap that comes between).
 222 sub start
 223 {
 224         my ($self, $line, $sort) = @_;
 225         my $call = $self->{call};
 226         my $user = $self->{user};
 227
 228         # log it
 229         my $host = $self->{conn}->{peerhost} || "unknown";
 230         Log('DXProt', "$call connected from $host");
 231
 232         # remember type of connection
 233         $self->{consort} = $line;
 234         $self->{outbound} = $sort eq 'O';
 235         my $priv = $user->priv;
 236         $priv = $user->priv(1) unless $priv;
 237         $self->{priv} = $priv;     # other clusters can always be 'normal' users
 238         $self->{lang} = $user->lang || 'en';
 239         $self->{isolate} = $user->{isolate};
 240         $self->{consort} = $line;       # save the connection type
 241         $self->{here} = 1;
 242         $self->{width} = 80;
 243
 244         # sort out registration
 245         $self->{registered} = 1;
 246
 247         # get the output filters
 248         $self->{spotsfilter} = Filter::read_in('spots', $call, 0) || Filter::read_in('spots', 'node_default', 0);
 249         $self->{wwvfilter} = Filter::read_in('wwv', $call, 0) || Filter::read_in('wwv', 'node_default', 0);
 250         $self->{wcyfilter} = Filter::read_in('wcy', $call, 0) || Filter::read_in('wcy', 'node_default', 0);
 251         $self->{annfilter} = Filter::read_in('ann', $call, 0) || Filter::read_in('ann', 'node_default', 0) ;
 252         $self->{routefilter} = Filter::read_in('route', $call, 0) || Filter::read_in('route', 'node_default', 0) unless $self->{isolate} ;
 253
 254
 255         # get the INPUT filters (these only pertain to Clusters)
 256         $self->{inspotsfilter} = Filter::read_in('spots', $call, 1) || Filter::read_in('spots', 'node_default', 1);
 257         $self->{inwwvfilter} = Filter::read_in('wwv', $call, 1) || Filter::read_in('wwv', 'node_default', 1);
 258         $self->{inwcyfilter} = Filter::read_in('wcy', $call, 1) || Filter::read_in('wcy', 'node_default', 1);
 259         $self->{inannfilter} = Filter::read_in('ann', $call, 1) || Filter::read_in('ann', 'node_default', 1);
 260         $self->{inroutefilter} = Filter::read_in('route', $call, 1) || Filter::read_in('route', 'node_default', 1) unless $self->{isolate};
 261
 262         # set unbuffered and no echo
 263         $self->send_now('B',"0");
 264         $self->send_now('E',"0");
 265         $self->conn->echo(0) if $self->conn->can('echo');
 266
 267         # ping neighbour node stuff
 268         my $ping = $user->pingint;
 269         $ping = 5*60 unless defined $ping;
 270         $self->{pingint} = $ping;
 271         $self->{nopings} = $user->nopings || 2;
 272         $self->{pingtime} = [ ];
 273         $self->{pingave} = 999;
 274         $self->{metric} ||= 100;
 275         $self->{lastping} = $main::systime;
 276
 277         # send initialisation string
 278         unless ($self->{outbound}) {
 279                 $self->send(pc18());
 280         }
 281
 282         $self->state('init');
 283         $self->{pc50_t} = $main::systime;
 284
 285         # send info to all logged in thingies
 286         $self->tell_login('loginn');
 287
 288         # run a script send the output to the debug file
 289         my $script = new Script(lc $call) || new Script('node_default');
 290         $script->run($self) if $script;
 291 }
 292
 293 #
 294 # This is the normal pcxx despatcher
 295 #
 296 sub normal
 297 {
 298         my ($self, $line) = @_;
 299         my @field = split /\^/, $line;
 300         return unless @field;
 301
 302         pop @field if $field[-1] eq '~';
 303
 304 #       print join(',', @field), "\n";
 305
 306
 307         # process PC frames, this will fail unless the frame starts PCnn
 308         my ($pcno) = $field[0] =~ /^PC(\d\d)/; # just get the number
 309         return unless $pcno;
 310         return if $pcno < 10 || $pcno > 99;
 311
 312         # check for and dump bad protocol messages
 313         my $n = check($pcno, @field);
 314         if ($n) {
 315                 dbg("PCPROT: bad field $n, dumped (" . parray($checklist[$pcno-10]) . ")") if isdbg('chanerr');
 316                 return;
 317         }
 318
 319         # local processing 1
 320         my $pcr;
 321         eval {
 322                 $pcr = Local::pcprot($self, $pcno, @field);
 323         };
 324 #       dbg("Local::pcprot error $@") if isdbg('local') if $@;
 325         return if $pcr;
 326
 327  SWITCH: {
 328                 if ($pcno == 10) {              # incoming talk
 329
 330                         # rsfp check
 331                         return if $rspfcheck and !$self->rspfcheck(0, $field[6], $field[1]);
 332
 333                         # will we allow it at all?
 334                         if ($censorpc) {
 335                                 my @bad;
 336                                 if (@bad = BadWords::check($field[3])) {
 337                                         dbg("PCPROT: Bad words: @bad, dropped") if isdbg('chanerr');
 338                                         return;
 339                                 }
 340                         }
 341
 342                         # is it for me or one of mine?
 343                         my ($from, $to, $via, $call, $dxchan);
 344                         $from = $field[1];
 345                         if ($field[5] gt ' ') {
 346                                 $via = $field[2];
 347                                 $to = $field[5];
 348                         } else {
 349                                 $to = $field[2];
 350                         }
 351
 352                         # if we are converting announces to talk is it a dup?
 353                         if ($ann_to_talk) {
 354                                 if (AnnTalk::is_talk_candidate($from, $field[3]) && AnnTalk::dup($from, $to, $field[3])) {
 355                                         dbg("DXPROT: Dupe talk from announce, dropped") if isdbg('chanerr');
 356                                         return;
 357                                 }
 358                         }
 359
 360                         # it is here and logged on
 361                         $dxchan = DXChannel->get($main::myalias) if $to eq $main::mycall;
 362                         $dxchan = DXChannel->get($to) unless $dxchan;
 363                         if ($dxchan && $dxchan->is_user) {
 364                                 $field[3] =~ s/\%5E/^/g;
 365                                 $dxchan->talk($from, $to, $via, $field[3]);
 366                                 return;
 367                         }
 368
 369                         # is it elsewhere, visible on the cluster via the to address?
 370                         # note: this discards the via unless the to address is on
 371                         # the via address
 372                         my ($ref, $vref);
 373                         if ($ref = Route::get($to)) {
 374                                 $vref = Route::Node::get($via) if $via;
 375                                 $vref = undef unless $vref && grep $to eq $_, $vref->users;
 376                                 $ref->dxchan->talk($from, $to, $vref ? $via : undef, $field[3], $field[6]);
 377                                 return;
 378                         }
 379
 380                         # not visible here, send a message of condolence
 381                         $vref = undef;
 382                         $ref = Route::get($from);
 383                         $vref = $ref = Route::Node::get($field[6]) unless $ref;
 384                         if ($ref) {
 385                                 $dxchan = $ref->dxchan;
 386                                 $dxchan->talk($main::mycall, $from, $vref ? $vref->call : undef, $dxchan->msg('talknh', $to) );
 387                         }
 388                         return;
 389                 }
 390
 391                 if ($pcno == 11 || $pcno == 26) { # dx spot
 392
 393                         # route 'foreign' pc26s
 394                         if ($pcno == 26) {
 395                                 if ($field[7] ne $main::mycall) {
 396                                         $self->route($field[7], $line);
 397                                         return;
 398                                 }
 399                         }
 400
 401                         # rsfp check
 402 #                       return if $rspfcheck and !$self->rspfcheck(1, $field[7], $field[6]);
 403
 404                         # if this is a 'nodx' node then ignore it
 405                         if ($badnode->in($field[7])) {
 406                                 dbg("PCPROT: Bad Node, dropped") if isdbg('chanerr');
 407                                 return;
 408                         }
 409
 410                         # if this is a 'bad spotter' user then ignore it
 411                         if ($badspotter->in($field[6])) {
 412                                 dbg("PCPROT: Bad Spotter, dropped") if isdbg('chanerr');
 413                                 return;
 414                         }
 415
 416                         # convert the date to a unix date
 417                         my $d = cltounix($field[3], $field[4]);
 418                         # bang out (and don't pass on) if date is invalid or the spot is too old (or too young)
 419                         if (!$d || ($pcno == 11 && ($d < $main::systime - $pc11_max_age || $d > $main::systime + 900))) {
 420                                 dbg("PCPROT: Spot ignored, invalid date or out of range ($field[3] $field[4])\n") if isdbg('chanerr');
 421                                 return;
 422                         }
 423
 424                         # is it 'baddx'
 425                         if ($baddx->in($field[2]) || BadWords::check($field[2]) || $field[2] =~ /COCK/) {
 426                                 dbg("PCPROT: Bad DX spot, ignored") if isdbg('chanerr');
 427                                 return;
 428                         }
 429
 430                         # do some de-duping
 431                         $field[5] =~ s/^\s+//;      # take any leading blanks off
 432                         $field[2] = unpad($field[2]);   # take off leading and trailing blanks from spotted callsign
 433                         if ($field[2] =~ /BUST\w*$/) {
 434                                 dbg("PCPROT: useless 'BUSTED' spot") if isdbg('chanerr');
 435                                 return;
 436                         }
 437                         if ($censorpc) {
 438                                 my @bad;
 439                                 if (@bad = BadWords::check($field[5])) {
 440                                         dbg("PCPROT: Bad words: @bad, dropped") if isdbg('chanerr');
 441                                         return;
 442                                 }
 443                         }
 444
 445                         if (Spot::dup($field[1], $field[2], $d, $field[5])) {
 446                                 dbg("PCPROT: Duplicate Spot ignored\n") if isdbg('chanerr');
 447                                 return;
 448                         }
 449
 450
 451                         my @spot = Spot::prepare($field[1], $field[2], $d, $field[5], $field[6], $field[7]);
 452                         # global spot filtering on INPUT
 453                         if ($self->{inspotsfilter}) {
 454                                 my ($filter, $hops) = $self->{inspotsfilter}->it(@spot);
 455                                 unless ($filter) {
 456                                         dbg("PCPROT: Rejected by input spot filter") if isdbg('chanerr');
 457                                         return;
 458                                 }
 459                         }
 460
 461                         # add it
 462                         Spot::add(@spot);
 463
 464             #
 465                         # @spot at this point contains:-
 466             # freq, spotted call, time, text, spotter, spotted cc, spotters cc, orig node
 467                         # then  spotted itu, spotted cq, spotters itu, spotters cq
 468                         # you should be able to route on any of these
 469             #
 470
 471                         # fix up qra locators of known users
 472                         my $user = DXUser->get_current($spot[4]);
 473                         if ($user) {
 474                                 my $qra = $user->qra;
 475                                 unless ($qra && is_qra($qra)) {
 476                                         my $lat = $user->lat;
 477                                         my $long = $user->long;
 478                                         if (defined $lat && defined $long) {
 479                                                 $user->qra(DXBearing::lltoqra($lat, $long));
 480                                                 $user->put;
 481                                         }
 482                                 }
 483
 484                                 # send a remote command to a distant cluster if it is visible and there is no
 485                                 # qra locator and we havn't done it for a month.
 486
 487                                 unless ($user->qra) {
 488                                         my $node;
 489                                         my $to = $user->homenode;
 490                                         my $last = $user->lastoper || 0;
 491                                         if ($send_opernam && $to && $to ne $main::mycall && $main::systime > $last + $DXUser::lastoperinterval && ($node = Route::Node::get($to)) ) {
 492                                                 my $cmd = "forward/opernam $spot[4]";
 493                                                 # send the rcmd but we aren't interested in the replies...
 494                                                 my $dxchan = $node->dxchan;
 495                                                 if ($dxchan && $dxchan->is_clx) {
 496                                                         route(undef, $to, pc84($main::mycall, $to, $main::mycall, $cmd));
 497                                                 } else {
 498                                                         route(undef, $to, pc34($main::mycall, $to, $cmd));
 499                                                 }
 500                                                 if ($to ne $field[7]) {
 501                                                         $to = $field[7];
 502                                                         $node = Route::Node::get($to);
 503                                                         if ($node) {
 504                                                                 $dxchan = $node->dxchan;
 505                                                                 if ($dxchan && $dxchan->is_clx) {
 506                                                                         route(undef, $to, pc84($main::mycall, $to, $main::mycall, $cmd));
 507                                                                 } else {
 508                                                                         route(undef, $to, pc34($main::mycall, $to, $cmd));
 509                                                                 }
 510                                                         }
 511                                                 }
 512                                                 $user->lastoper($main::systime);
 513                                                 $user->put;
 514                                         }
 515                                 }
 516                         }
 517
 518                         # local processing
 519                         my $r;
 520                         eval {
 521                                 $r = Local::spot($self, @spot);
 522                         };
 523 #                       dbg("Local::spot1 error $@") if isdbg('local') if $@;
 524                         return if $r;
 525
 526                         # DON'T be silly and send on PC26s!
 527                         return if $pcno == 26;
 528
 529                         # send out the filtered spots
 530                         send_dx_spot($self, $line, @spot) if @spot;
 531                         return;
 532                 }
 533
 534                 if ($pcno == 12) {              # announces
 535
 536 #                       return if $rspfcheck and !$self->rspfcheck(1, $field[5], $field[1]);
 537
 538                         # announce duplicate checking
 539                         $field[3] =~ s/^\s+//;  # remove leading blanks
 540
 541                         if ($censorpc) {
 542                                 my @bad;
 543                                 if (@bad = BadWords::check($field[3])) {
 544                                         dbg("PCPROT: Bad words: @bad, dropped") if isdbg('chanerr');
 545                                         return;
 546                                 }
 547                         }
 548
 549                         if ($field[2] eq '*' || $field[2] eq $main::mycall) {
 550
 551
 552                                 # here's a bit of fun, convert incoming ann with a callsign in the first word
 553                                 # or one saying 'to <call>' to a talk if we can route to the recipient
 554                                 if ($ann_to_talk) {
 555                                         my $call = AnnTalk::is_talk_candidate($field[1], $field[3]);
 556                                         if ($call) {
 557                                                 my $ref = Route::get($call);
 558                                                 if ($ref) {
 559                                                         my $dxchan = $ref->dxchan;
 560                                                         $dxchan->talk($field[1], $call, undef, $field[3], $field[5]) if $dxchan != $self;
 561                                                         return;
 562                                                 }
 563                                         }
 564                                 }
 565
 566                                 # send it
 567                                 $self->send_announce($line, @field[1..6]);
 568                         } else {
 569                                 $self->route($field[2], $line);
 570                         }
 571                         return;
 572                 }
 573
 574                 if ($pcno == 13) {
 575                         last SWITCH;
 576                 }
 577                 if ($pcno == 14) {
 578                         last SWITCH;
 579                 }
 580                 if ($pcno == 15) {
 581                         last SWITCH;
 582                 }
 583
 584                 if ($pcno == 16) {              # add a user
 585
 586                         if (eph_dup($line)) {
 587                                 dbg("PCPROT: dup PC16 detected") if isdbg('chanerr');
 588                                 return;
 589                         }
 590
 591                         # general checks
 592                         my $dxchan;
 593                         my $ncall = $field[1];
 594                         my $newline = "PC16^";
 595
 596                         if ($ncall eq $main::mycall) {
 597                                 dbg("PCPROT: trying to alter config on this node from outside!") if isdbg('chanerr');
 598                                 return;
 599                         }
 600                         my $parent = Route::Node::get($ncall);
 601                         unless ($parent) {
 602                                 dbg("PCPROT: Node $ncall not in config") if isdbg('chanerr');
 603                                 return;
 604                         }
 605                         $dxchan = $parent->dxchan;
 606                         if ($dxchan && $dxchan ne $self) {
 607                                 dbg("PCPROT: PC16 from $self->{call} trying to alter locally connected $ncall, ignored!") if isdbg('chanerr');
 608                                 return;
 609                         }
 610
 611                         # input filter if required
 612                         return unless $self->in_filter_route($parent);
 613
 614                         my $i;
 615                         my @rout;
 616                         for ($i = 2; $i < $#field; $i++) {
 617                                 my ($call, $conf, $here) = $field[$i] =~ /^(\S+) (\S) (\d)/o;
 618                                 next unless $call && $conf && defined $here && is_callsign($call);
 619                                 next if $call eq $main::mycall;
 620
 621                                 eph_del_regex("^PC17\^$call\^$ncall");
 622
 623                                 $conf = $conf eq '*';
 624
 625                                 # reject this if we think it is a node already
 626                                 my $r = Route::Node::get($call);
 627                                 my $u = DXUser->get_current($call) unless $r;
 628                                 if ($r || ($u && $u->is_node)) {
 629                                         dbg("PCPROT: $call is a node") if isdbg('chanerr');
 630                                         next;
 631                                 }
 632
 633                                 $r = Route::User::get($call);
 634                                 my $flags = Route::here($here)|Route::conf($conf);
 635
 636                                 if ($r) {
 637                                         if ($r->flags != $flags) {
 638                                                 $r->flags($flags);
 639                                                 push @rout, $r;
 640                                         }
 641                                         $r->addparent($parent);
 642                                 } else {
 643                                         push @rout, $parent->add_user($call, $flags);
 644                                 }
 645
 646                                 # add this station to the user database, if required
 647                                 $call =~ s/-\d+$//o;        # remove ssid for users
 648                                 my $user = DXUser->get_current($call);
 649                                 $user = DXUser->new($call) if !$user;
 650                                 $user->homenode($parent->call) if !$user->homenode;
 651                                 $user->node($parent->call);
 652                                 $user->lastin($main::systime) unless DXChannel->get($call);
 653                                 $user->put;
 654                         }
 655
 656                         # queue up any messages (look for privates only)
 657                         DXMsg::queue_msg(1) if $self->state eq 'normal';
 658
 659                         $self->route_pc16($parent, @rout) if @rout;
 660                         return;
 661                 }
 662
 663                 if ($pcno == 17) {              # remove a user
 664                         my $dxchan;
 665                         my $ncall = $field[2];
 666                         my $ucall = $field[1];
 667
 668                         if (eph_dup($line)) {
 669                                 dbg("PCPROT: dup PC17 detected") if isdbg('chanerr');
 670                                 return;
 671                         }
 672
 673                         eph_del_regex("^PC16.*$ncall.*$ucall");
 674
 675                         if ($ncall eq $main::mycall) {
 676                                 dbg("PCPROT: trying to alter config on this node from outside!") if isdbg('chanerr');
 677                                 return;
 678                         }
 679
 680                         my $uref = Route::User::get($ucall);
 681                         unless ($uref) {
 682                                 dbg("PCPROT: Route::User $ucall not in config") if isdbg('chanerr');
 683                                 return;
 684                         }
 685                         my $parent = Route::Node::get($ncall);
 686                         unless ($parent) {
 687                                 dbg("PCPROT: Route::Node $ncall not in config") if isdbg('chanerr');
 688                                 return;
 689                         }
 690
 691                         $dxchan = $parent->dxchan;
 692                         if ($dxchan && $dxchan ne $self) {
 693                                 dbg("PCPROT: PC17 from $self->{call} trying to alter locally connected $ncall, ignored!") if isdbg('chanerr');
 694                                 return;
 695                         }
 696
 697                         # input filter if required
 698                         return unless $self->in_filter_route($parent);
 699
 700                         $parent->del_user($uref);
 701                         $self->route_pc17($parent, $uref);
 702                         return;
 703                 }
 704
 705                 if ($pcno == 18) {              # link request
 706                         $self->state('init');
 707
 708                         # first clear out any nodes on this dxchannel
 709                         my $parent = Route::Node::get($self->{call});
 710                         my @rout = $parent->del_nodes;
 711                         $self->route_pc21(@rout, $parent) if @rout;
 712                         $self->send_local_config();
 713                         $self->send(pc20());
 714                         return;             # we don't pass these on
 715                 }
 716
 717                 if ($pcno == 19) {              # incoming cluster list
 718                         my $i;
 719                         my $newline = "PC19^";
 720
 721                         if (eph_dup($line)) {
 722                                 dbg("PCPROT: dup PC19 detected") if isdbg('chanerr');
 723                                 return;
 724                         }
 725
 726                         # new routing list
 727                         my @rout;
 728                         my $parent = Route::Node::get($self->{call});
 729                         unless ($parent) {
 730                                 dbg("DXPROT: my parent $self->{call} has disappeared");
 731                                 $self->disconnect;
 732                                 return;
 733                         }
 734
 735                         # parse the PC19
 736                         for ($i = 1; $i < $#field-1; $i += 4) {
 737                                 my $here = $field[$i];
 738                                 my $call = uc $field[$i+1];
 739                                 my $conf = $field[$i+2];
 740                                 my $ver = $field[$i+3];
 741                                 next unless defined $here && defined $conf && is_callsign($call);
 742
 743                                 eph_del_regex("^PC(?:21\^$call|17\^[^\^]+\^$call)");
 744
 745                                 # check for sane parameters
 746 #                               $ver = 5000 if $ver eq '0000';
 747                                 next if $ver < 5000; # only works with version 5 software
 748                                 next if length $call < 3; # min 3 letter callsigns
 749                                 next if $call eq $main::mycall;
 750
 751                                 # check that this PC19 isn't trying to alter the wrong dxchan
 752                                 my $dxchan = DXChannel->get($call);
 753                                 if ($dxchan && $dxchan != $self) {
 754                                         dbg("PCPROT: PC19 from $self->{call} trying to alter wrong locally connected $call, ignored!") if isdbg('chanerr');
 755                                         return;
 756                                 }
 757
 758                                 # update it if required
 759                                 my $r = Route::Node::get($call);
 760                                 my $flags = Route::here($here)|Route::conf($conf);
 761                                 if ($r) {
 762                                         my $ar;
 763                                         if ($call ne $parent->call) {
 764                                                 if ($self->in_filter_route($r)) {
 765                                                         $ar = $parent->add($call, $ver, $flags);
 766                                                         push @rout, $ar if $ar;
 767                                                 } else {
 768                                                         next;
 769                                                 }
 770                                         }
 771                                         if ($r->version ne $ver || $r->flags != $flags) {
 772                                                 $r->version($ver);
 773                                                 $r->flags($flags);
 774                                                 push @rout, $r unless $ar;
 775                                         }
 776                                 } else {
 777                                         if ($call eq $self->{call}) {
 778                                                 dbg("DXPROT: my channel route for $call has disappeared");
 779                                                 next;
 780                                         };
 781
 782                                         my $new = Route->new($call);          # throw away
 783                                     if ($self->in_filter_route($new)) {
 784                                                 my $r = $parent->add($call, $ver, $flags);
 785                                                 push @rout, $r;
 786                                         } else {
 787                                                 next;
 788                                         }
 789                                 }
 790
 791                                 # unbusy and stop and outgoing mail (ie if somehow we receive another PC19 without a disconnect)
 792                                 my $mref = DXMsg::get_busy($call);
 793                                 $mref->stop_msg($call) if $mref;
 794
 795                                 # add this station to the user database, if required (don't remove SSID from nodes)
 796                                 my $user = DXUser->get_current($call);
 797                                 if (!$user) {
 798                                         $user = DXUser->new($call);
 799                                         $user->sort('A');
 800                                         $user->priv(1);                   # I have relented and defaulted nodes
 801                                         $user->lockout(1);
 802                                         $user->homenode($call);
 803                                         $user->node($call);
 804                                 }
 805                                 $user->lastin($main::systime) unless DXChannel->get($call);
 806                                 $user->put;
 807                         }
 808
 809
 810                         $self->route_pc19(@rout) if @rout;
 811                         return;
 812                 }
 813
 814                 if ($pcno == 20) {              # send local configuration
 815                         $self->send_local_config();
 816                         $self->send(pc22());
 817                         $self->state('normal');
 818                         $self->{lastping} = 0;
 819                         return;
 820                 }
 821
 822                 if ($pcno == 21) {              # delete a cluster from the list
 823                         my $call = uc $field[1];
 824
 825                         if (eph_dup($line)) {
 826                                 dbg("PCPROT: dup PC21 detected") if isdbg('chanerr');
 827                                 return;
 828                         }
 829
 830                         # if I get a PC21 from the same callsign as self then treat it
 831                         # as a PC39: I have gone away
 832                         if ($call eq $self->call) {
 833                                 $self->disconnect(1);
 834                                 eph_del_regex("^PC(?:1[679]|21).*$field[1]");
 835                                 return;
 836                         }
 837
 838                         eph_del_regex("^PC1[79].*$call");
 839
 840                         my @rout;
 841                         my $parent = Route::Node::get($self->{call});
 842                         unless ($parent) {
 843                                 dbg("DXPROT: my parent $self->{call} has disappeared");
 844                                 $self->disconnect;
 845                                 return;
 846                         }
 847                         if ($call ne $main::mycall) { # don't allow malicious buggers to disconnect me!
 848                                 my $node = Route::Node::get($call);
 849                                 if ($node) {
 850
 851                                         my $dxchan = DXChannel->get($call);
 852                                         if ($dxchan && $dxchan != $self) {
 853                                                 dbg("PCPROT: PC21 from $self->{call} trying to alter locally connected $call, ignored!") if isdbg('chanerr');
 854                                                 return;
 855                                         }
 856
 857                                         # input filter it
 858                                         return unless $self->in_filter_route($node);
 859
 860                                         # routing objects
 861                                         push @rout, $node->del($parent);
 862                                 }
 863                         } else {
 864                                 dbg("PCPROT: I WILL _NOT_ be disconnected!") if isdbg('chanerr');
 865                                 return;
 866                         }
 867
 868                         $self->route_pc21(@rout) if @rout;
 869                         return;
 870                 }
 871
 872                 if ($pcno == 22) {
 873                         $self->state('normal');
 874                         $self->{lastping} = 0;
 875                         return;
 876                 }
 877
 878                 if ($pcno == 23 || $pcno == 27) { # WWV info
 879
 880                         # route 'foreign' pc27s
 881                         if ($pcno == 27) {
 882                                 if ($field[8] ne $main::mycall) {
 883                                         $self->route($field[8], $line);
 884                                         return;
 885                                 }
 886                         }
 887
 888                         return if $rspfcheck and !$self->rspfcheck(1, $field[8], $field[7]);
 889
 890                         # do some de-duping
 891                         my $d = cltounix($field[1], sprintf("%02d18Z", $field[2]));
 892                         my $sfi = unpad($field[3]);
 893                         my $k = unpad($field[4]);
 894                         my $i = unpad($field[5]);
 895                         my ($r) = $field[6] =~ /R=(\d+)/;
 896                         $r = 0 unless $r;
 897                         if (($pcno == 23 && $d < $main::systime - $pc23_max_age) || $d > $main::systime + 1500 || $field[2] < 0 || $field[2] > 23) {
 898                                 dbg("PCPROT: WWV Date ($field[1] $field[2]) out of range") if isdbg('chanerr');
 899                                 return;
 900                         }
 901                         if (Geomag::dup($d,$sfi,$k,$i,$field[6])) {
 902                                 dbg("PCPROT: Dup WWV Spot ignored\n") if isdbg('chanerr');
 903                                 return;
 904                         }
 905                         $field[7] =~ s/-\d+$//o;            # remove spotter's ssid
 906
 907                         my $wwv = Geomag::update($d, $field[2], $sfi, $k, $i, @field[6..8], $r);
 908
 909                         my $rep;
 910                         eval {
 911                                 $rep = Local::wwv($self, $field[1], $field[2], $sfi, $k, $i, @field[6..8], $r);
 912                         };
 913 #                       dbg("Local::wwv2 error $@") if isdbg('local') if $@;
 914                         return if $rep;
 915
 916                         # DON'T be silly and send on PC27s!
 917                         return if $pcno == 27;
 918
 919                         # broadcast to the eager world
 920                         send_wwv_spot($self, $line, $d, $field[2], $sfi, $k, $i, @field[6..8]);
 921                         return;
 922                 }
 923
 924                 if ($pcno == 24) {              # set here status
 925                         my $call = uc $field[1];
 926                         my ($nref, $uref);
 927                         $nref = Route::Node::get($call);
 928                         $uref = Route::User::get($call);
 929                         return unless $nref || $uref;   # if we don't know where they are, it's pointless sending it on
 930
 931                         unless (eph_dup($line)) {
 932                                 $nref->here($field[2]) if $nref;
 933                                 $uref->here($field[2]) if $uref;
 934                                 my $ref = $nref || $uref;
 935                                 return unless $self->in_filter_route($ref);
 936                                 $self->route_pc24($ref, $field[3]);
 937                         }
 938                         return;
 939                 }
 940
 941                 if ($pcno == 25) {      # merge request
 942                         if ($field[1] ne $main::mycall) {
 943                                 $self->route($field[1], $line);
 944                                 return;
 945                         }
 946                         if ($field[2] eq $main::mycall) {
 947                                 dbg("PCPROT: Trying to merge to myself, ignored") if isdbg('chanerr');
 948                                 return;
 949                         }
 950
 951                         Log('DXProt', "Merge request for $field[3] spots and $field[4] WWV from $field[2]");
 952
 953                         # spots
 954                         if ($field[3] > 0) {
 955                                 my @in = reverse Spot::search(1, undef, undef, 0, $field[3]);
 956                                 my $in;
 957                                 foreach $in (@in) {
 958                                         $self->send(pc26(@{$in}[0..4], $field[2]));
 959                                 }
 960                         }
 961
 962                         # wwv
 963                         if ($field[4] > 0) {
 964                                 my @in = reverse Geomag::search(0, $field[4], time, 1);
 965                                 my $in;
 966                                 foreach $in (@in) {
 967                                         $self->send(pc27(@{$in}[0..5], $field[2]));
 968                                 }
 969                         }
 970                         return;
 971                 }
 972
 973                 if (($pcno >= 28 && $pcno <= 33) || $pcno == 40 || $pcno == 42 || $pcno == 49) { # mail/file handling
 974                         return if $pcno == 49 && eph_dup($line);
 975                         if ($pcno == 49 || $field[1] eq $main::mycall) {
 976                                 DXMsg::process($self, $line);
 977                         } else {
 978                                 $self->route($field[1], $line) unless $self->is_clx;
 979                         }
 980                         return;
 981                 }
 982
 983                 if ($pcno == 34 || $pcno == 36) { # remote commands (incoming)
 984                         if (eph_dup($line, $eph_pc34_restime)) {
 985                                 dbg("PCPROT: dupe") if isdbg('chanerr');
 986                         } else {
 987                                 $self->process_rcmd($field[1], $field[2], $field[2], $field[3]);
 988                         }
 989                         return;
 990                 }
 991
 992                 if ($pcno == 35) {              # remote command replies
 993                         eph_del_regex("^PC35\^$field[2]\^$field[1]\^");
 994                         $self->process_rcmd_reply($field[1], $field[2], $field[1], $field[3]);
 995                         return;
 996                 }
 997
 998                 # for pc 37 see 44 onwards
 999
1000                 if ($pcno == 38) {              # node connected list from neighbour
1001                         return;
1002                 }
1003
1004                 if ($pcno == 39) {              # incoming disconnect
1005                         if ($field[1] eq $self->{call}) {
1006                                 $self->disconnect(1);
1007                                 eph_del_regex("^PC(?:1[679]|21).*$field[1]");
1008                         } else {
1009                                 dbg("PCPROT: came in on wrong channel") if isdbg('chanerr');
1010                         }
1011                         return;
1012                 }
1013
1014                 if ($pcno == 41) {              # user info
1015                         my $call = $field[1];
1016
1017                         if (eph_dup($line, $eph_info_restime)) {
1018                                 dbg("PCPROT: dupe") if isdbg('chanerr');
1019                                 return;
1020                         }
1021
1022                         # input filter if required
1023 #                       my $ref = Route::get($call) || Route->new($call);
1024 #                       return unless $self->in_filter_route($ref);
1025
1026                         if ($field[3] eq $field[2] || $field[3] =~ /^\s*$/) {
1027                                 dbg('PCPROT: invalid value') if isdbg('chanerr');
1028                                 return;
1029                         }
1030
1031                         # add this station to the user database, if required
1032                         my $user = DXUser->get_current($call);
1033                         $user = DXUser->new($call) if !$user;
1034
1035                         if ($field[2] == 1) {
1036                                 $user->name($field[3]);
1037                         } elsif ($field[2] == 2) {
1038                                 $user->qth($field[3]);
1039                         } elsif ($field[2] == 3) {
1040                                 if (is_latlong($field[3])) {
1041                                         my ($lat, $long) = DXBearing::stoll($field[3]);
1042                                         $user->lat($lat);
1043                                         $user->long($long);
1044                                         $user->qra(DXBearing::lltoqra($lat, $long));
1045                                 } else {
1046                                         dbg('PCPROT: not a valid lat/long') if isdbg('chanerr');
1047                                         return;
1048                                 }
1049                         } elsif ($field[2] == 4) {
1050                                 $user->homenode($field[3]);
1051                         } elsif ($field[2] == 5) {
1052                                 if (is_qra(uc $field[3])) {
1053                                         my ($lat, $long) = DXBearing::qratoll(uc $field[3]);
1054                                         $user->lat($lat);
1055                                         $user->long($long);
1056                                         $user->qra(uc $field[3]);
1057                                 } else {
1058                                         dbg('PCPROT: not a valid QRA locator') if isdbg('chanerr');
1059                                         return;
1060                                 }
1061                         }
1062                         $user->lastoper($main::systime);   # to cut down on excessive for/opers being generated
1063                         $user->put;
1064
1065                         unless ($self->{isolate}) {
1066                                 DXChannel::broadcast_nodes($line, $self); # send it to everyone but me
1067                         }
1068
1069 #  perhaps this IS what we want after all
1070 #                       $self->route_pc41($ref, $call, $field[2], $field[3], $field[4]);
1071                         return;
1072                 }
1073
1074                 if ($pcno == 43) {
1075                         last SWITCH;
1076                 }
1077
1078                 if ($pcno == 37 || $pcno == 44 || $pcno == 45 || $pcno == 46 || $pcno == 47 || $pcno == 48) {
1079                         DXDb::process($self, $line);
1080                         return;
1081                 }
1082
1083                 if ($pcno == 50) {              # keep alive/user list
1084                         my $call = $field[1];
1085                         my $node = Route::Node::get($call);
1086                         if ($node) {
1087                                 return unless $node->call eq $self->{call};
1088                                 $node->usercount($field[2]);
1089
1090                                 # input filter if required
1091                                 return unless $self->in_filter_route($node);
1092
1093                                 $self->route_pc50($node, $field[2], $field[3]) unless eph_dup($line);
1094                         }
1095                         return;
1096                 }
1097
1098                 if ($pcno == 51) {              # incoming ping requests/answers
1099                         my $to = $field[1];
1100                         my $from = $field[2];
1101                         my $flag = $field[3];
1102
1103
1104                         # is it for us?
1105                         if ($to eq $main::mycall) {
1106                                 if ($flag == 1) {
1107                                         $self->send(pc51($from, $to, '0'));
1108                                 } else {
1109                                         # it's a reply, look in the ping list for this one
1110                                         my $ref = $pings{$from};
1111                                         if ($ref) {
1112                                                 my $tochan =  DXChannel->get($from);
1113                                                 while (@$ref) {
1114                                                         my $r = shift @$ref;
1115                                                         my $dxchan = DXChannel->get($r->{call});
1116                                                         next unless $dxchan;
1117                                                         my $t = tv_interval($r->{t}, [ gettimeofday ]);
1118                                                         if ($dxchan->is_user) {
1119                                                                 my $s = sprintf "%.2f", $t;
1120                                                                 my $ave = sprintf "%.2f", $tochan ? ($tochan->{pingave} || $t) : $t;
1121                                                                 $dxchan->send($dxchan->msg('pingi', $from, $s, $ave))
1122                                                         } elsif ($dxchan->is_node) {
1123                                                                 if ($tochan) {
1124                                                                         my $nopings = $tochan->user->nopings || 2;
1125                                                                         push @{$tochan->{pingtime}}, $t;
1126                                                                         shift @{$tochan->{pingtime}} if @{$tochan->{pingtime}} > 6;
1127
1128                                                                         # cope with a missed ping, this means you must set the pingint large enough
1129                                                                         if ($t > $tochan->{pingint}  && $t < 2 * $tochan->{pingint} ) {
1130                                                                                 $t -= $tochan->{pingint};
1131                                                                         }
1132
1133                                                                         # calc smoothed RTT a la TCP
1134                                                                         if (@{$tochan->{pingtime}} == 1) {
1135                                                                                 $tochan->{pingave} = $t;
1136                                                                         } else {
1137                                                                                 $tochan->{pingave} = $tochan->{pingave} + (($t - $tochan->{pingave}) / 6);
1138                                                                         }
1139 #                                                                       my $st;
1140 #                                                                       for (@{$tochan->{pingtime}}) {
1141 #                                                                               $st += $_;
1142 #                                                                       }
1143 #                                                                       $tochan->{pingave} = $st / @{$tochan->{pingtime}};
1144                                                                         $tochan->{nopings} = $nopings; # pump up the timer
1145                                                                 }
1146                                                         }
1147                                                 }
1148                                         }
1149                                 }
1150                         } else {
1151                                 if (eph_dup($line)) {
1152                                         dbg("PCPROT: dup PC51 detected") if isdbg('chanerr');
1153                                         return;
1154                                 }
1155                                 # route down an appropriate thingy
1156                                 $self->route($to, $line);
1157                         }
1158                         return;
1159                 }
1160
1161                 if ($pcno == 75) {              # dunno but route it
1162                         my $call = $field[1];
1163                         if ($call ne $main::mycall) {
1164                                 $self->route($call, $line);
1165                         }
1166                         return;
1167                 }
1168
1169                 if ($pcno == 73) {  # WCY broadcasts
1170                         my $call = $field[1];
1171
1172                         # do some de-duping
1173                         my $d = cltounix($call, sprintf("%02d18Z", $field[2]));
1174                         if (($pcno == 23 && $d < $main::systime - $pc23_max_age) || $d > $main::systime + 1500 || $field[2] < 0 || $field[2] > 23) {
1175                                 dbg("PCPROT: WCY Date ($call $field[2]) out of range") if isdbg('chanerr');
1176                                 return;
1177                         }
1178                         @field = map { unpad($_) } @field;
1179                         if (WCY::dup($d)) {
1180                                 dbg("PCPROT: Dup WCY Spot ignored\n") if isdbg('chanerr');
1181                                 return;
1182                         }
1183
1184                         my $wcy = WCY::update($d, @field[2..12]);
1185
1186                         my $rep;
1187                         eval {
1188                                 $rep = Local::wcy($self, @field[1..12]);
1189                         };
1190                         # dbg("Local::wcy error $@") if isdbg('local') if $@;
1191                         return if $rep;
1192
1193                         # broadcast to the eager world
1194                         send_wcy_spot($self, $line, $d, @field[2..12]);
1195                         return;
1196                 }
1197
1198                 if ($pcno == 84) { # remote commands (incoming)
1199                         $self->process_rcmd($field[1], $field[2], $field[3], $field[4]);
1200                         return;
1201                 }
1202
1203                 if ($pcno == 85) {              # remote command replies
1204                         $self->process_rcmd_reply($field[1], $field[2], $field[3], $field[4]);
1205
1206                         return;
1207                 }
1208         }
1209
1210         # if get here then rebroadcast the thing with its Hop count decremented (if
1211         # there is one). If it has a hop count and it decrements to zero then don't
1212         # rebroadcast it.
1213         #
1214         # NOTE - don't arrive here UNLESS YOU WANT this lump of protocol to be
1215         #        REBROADCAST!!!!
1216         #
1217
1218         if (eph_dup($line)) {
1219                 dbg("PCPROT: Ephemeral dup, dropped") if isdbg('chanerr');
1220         } else {
1221                 unless ($self->{isolate}) {
1222                         DXChannel::broadcast_nodes($line, $self); # send it to everyone but me
1223                 }
1224         }
1225 }
1226
1227 #
1228 # This is called from inside the main cluster processing loop and is used
1229 # for despatching commands that are doing some long processing job
1230 #
1231 sub process
1232 {
1233         my $t = time;
1234         my @dxchan = DXChannel->get_all();
1235         my $dxchan;
1236         my $pc50s;
1237
1238         # send out a pc50 on EVERY channel all at once
1239         if ($t >= $last_pc50 + $DXProt::pc50_interval) {
1240                 $pc50s = pc50($main::me, scalar DXChannel::get_all_users);
1241                 eph_dup($pc50s);
1242                 $last_pc50 = $t;
1243         }
1244
1245         foreach $dxchan (@dxchan) {
1246                 next unless $dxchan->is_node();
1247                 next if $dxchan == $main::me;
1248
1249                 # send the pc50
1250                 $dxchan->send($pc50s) if $pc50s;
1251
1252                 # send a ping out on this channel
1253                 if ($dxchan->{pingint} && $t >= $dxchan->{pingint} + $dxchan->{lastping}) {
1254                         if ($dxchan->{nopings} <= 0) {
1255                                 $dxchan->disconnect;
1256                         } else {
1257                                 addping($main::mycall, $dxchan->call);
1258                                 $dxchan->{nopings} -= 1;
1259                                 $dxchan->{lastping} = $t;
1260                         }
1261                 }
1262         }
1263
1264         # every ten seconds
1265         if ($t - $last10 >= 10) {
1266                 # clean out ephemera
1267
1268                 eph_clean();
1269
1270                 $last10 = $t;
1271         }
1272
1273         if ($main::systime - 3600 > $last_hour) {
1274                 $last_hour = $main::systime;
1275         }
1276 }
1277
1278 #
1279 # finish up a pc context
1280 #
1281
1282 #
1283 # some active measures
1284 #
1285
1286 sub send_dx_spot
1287 {
1288         my $self = shift;
1289         my $line = shift;
1290         my @dxchan = DXChannel->get_all();
1291         my $dxchan;
1292
1293         # send it if it isn't the except list and isn't isolated and still has a hop count
1294         # taking into account filtering and so on
1295         foreach $dxchan (@dxchan) {
1296                 next if $dxchan == $main::me;
1297                 next if $dxchan == $self && $self->is_node;
1298                 $dxchan->dx_spot($line, $self->{isolate}, @_, $self->{call});
1299         }
1300 }
1301
1302 sub dx_spot
1303 {
1304         my $self = shift;
1305         my $line = shift;
1306         my $isolate = shift;
1307         my ($filter, $hops);
1308
1309         if ($self->{spotsfilter}) {
1310                 ($filter, $hops) = $self->{spotsfilter}->it(@_);
1311                 return unless $filter;
1312         }
1313         send_prot_line($self, $filter, $hops, $isolate, $line);
1314 }
1315
1316 sub send_prot_line
1317 {
1318         my ($self, $filter, $hops, $isolate, $line) = @_;
1319         my $routeit;
1320
1321         if ($hops) {
1322                 $routeit = $line;
1323                 $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
1324         } else {
1325                 $routeit = adjust_hops($self, $line);  # adjust its hop count by node name
1326                 return unless $routeit;
1327         }
1328         if ($filter) {
1329                 $self->send($routeit);
1330         } else {
1331                 $self->send($routeit) unless $self->{isolate} || $isolate;
1332         }
1333 }
1334
1335
1336 sub send_wwv_spot
1337 {
1338         my $self = shift;
1339         my $line = shift;
1340         my @dxchan = DXChannel->get_all();
1341         my $dxchan;
1342         my ($wwv_dxcc, $wwv_itu, $wwv_cq, $org_dxcc, $org_itu, $org_cq) = (0..0);
1343         my @dxcc = Prefix::extract($_[6]);
1344         if (@dxcc > 0) {
1345                 $wwv_dxcc = $dxcc[1]->dxcc;
1346                 $wwv_itu = $dxcc[1]->itu;
1347                 $wwv_cq = $dxcc[1]->cq;
1348         }
1349         @dxcc = Prefix::extract($_[7]);
1350         if (@dxcc > 0) {
1351                 $org_dxcc = $dxcc[1]->dxcc;
1352                 $org_itu = $dxcc[1]->itu;
1353                 $org_cq = $dxcc[1]->cq;
1354         }
1355
1356         # send it if it isn't the except list and isn't isolated and still has a hop count
1357         # taking into account filtering and so on
1358         foreach $dxchan (@dxchan) {
1359                 next if $dxchan == $main::me;
1360                 next if $dxchan == $self && $self->is_node;
1361                 my $routeit;
1362                 my ($filter, $hops);
1363
1364                 $dxchan->wwv($line, $self->{isolate}, @_, $self->{call}, $wwv_dxcc, $wwv_itu, $wwv_cq, $org_dxcc, $org_itu, $org_cq);
1365         }
1366
1367 }
1368
1369 sub wwv
1370 {
1371         my $self = shift;
1372         my $line = shift;
1373         my $isolate = shift;
1374         my ($filter, $hops);
1375
1376         if ($self->{wwvfilter}) {
1377                 ($filter, $hops) = $self->{wwvfilter}->it(@_);
1378                 return unless $filter;
1379         }
1380         send_prot_line($self, $filter, $hops, $isolate, $line)
1381 }
1382
1383 sub send_wcy_spot
1384 {
1385         my $self = shift;
1386         my $line = shift;
1387         my @dxchan = DXChannel->get_all();
1388         my $dxchan;
1389         my ($wcy_dxcc, $wcy_itu, $wcy_cq, $org_dxcc, $org_itu, $org_cq) = (0..0);
1390         my @dxcc = Prefix::extract($_[10]);
1391         if (@dxcc > 0) {
1392                 $wcy_dxcc = $dxcc[1]->dxcc;
1393                 $wcy_itu = $dxcc[1]->itu;
1394                 $wcy_cq = $dxcc[1]->cq;
1395         }
1396         @dxcc = Prefix::extract($_[11]);
1397         if (@dxcc > 0) {
1398                 $org_dxcc = $dxcc[1]->dxcc;
1399                 $org_itu = $dxcc[1]->itu;
1400                 $org_cq = $dxcc[1]->cq;
1401         }
1402
1403         # send it if it isn't the except list and isn't isolated and still has a hop count
1404         # taking into account filtering and so on
1405         foreach $dxchan (@dxchan) {
1406                 next if $dxchan == $main::me;
1407                 next if $dxchan == $self;
1408
1409                 $dxchan->wcy($line, $self->{isolate}, @_, $self->{call}, $wcy_dxcc, $wcy_itu, $wcy_cq, $org_dxcc, $org_itu, $org_cq);
1410         }
1411 }
1412
1413 sub wcy
1414 {
1415         my $self = shift;
1416         my $line = shift;
1417         my $isolate = shift;
1418         my ($filter, $hops);
1419
1420         if ($self->{wcyfilter}) {
1421                 ($filter, $hops) = $self->{wcyfilter}->it(@_);
1422                 return unless $filter;
1423         }
1424         send_prot_line($self, $filter, $hops, $isolate, $line) if $self->is_clx || $self->is_spider || $self->is_dxnet;
1425 }
1426
1427 # send an announce
1428 sub send_announce
1429 {
1430         my $self = shift;
1431         my $line = shift;
1432         my @dxchan = DXChannel->get_all();
1433         my $dxchan;
1434         my $target;
1435         my $to = 'To ';
1436         my $text = unpad($_[2]);
1437
1438         if ($_[3] eq '*') {     # sysops
1439                 $target = "SYSOP";
1440         } elsif ($_[3] gt ' ') { # speciality list handling
1441                 my ($name) = split /\./, $_[3];
1442                 $target = "$name"; # put the rest in later (if bothered)
1443         }
1444
1445         if ($_[5] eq '1') {
1446                 $target = "WX";
1447                 $to = '';
1448         }
1449         $target = "ALL" if !$target;
1450
1451
1452         # obtain country codes etc
1453         my ($ann_dxcc, $ann_itu, $ann_cq, $org_dxcc, $org_itu, $org_cq) = (0..0);
1454         my @dxcc = Prefix::extract($_[0]);
1455         if (@dxcc > 0) {
1456                 $ann_dxcc = $dxcc[1]->dxcc;
1457                 $ann_itu = $dxcc[1]->itu;
1458                 $ann_cq = $dxcc[1]->cq;
1459         }
1460         @dxcc = Prefix::extract($_[4]);
1461         if (@dxcc > 0) {
1462                 $org_dxcc = $dxcc[1]->dxcc;
1463                 $org_itu = $dxcc[1]->itu;
1464                 $org_cq = $dxcc[1]->cq;
1465         }
1466
1467         if ($self->{inannfilter}) {
1468                 my ($filter, $hops) =
1469                         $self->{inannfilter}->it(@_, $self->{call},
1470                                                                          $ann_dxcc, $ann_itu, $ann_cq,
1471                                                                          $org_dxcc, $org_itu, $org_cq);
1472                 unless ($filter) {
1473                         dbg("PCPROT: Rejected by input announce filter") if isdbg('chanerr');
1474                         return;
1475                 }
1476         }
1477
1478         if (AnnTalk::dup($_[0], $_[1], $_[2])) {
1479                 dbg("PCPROT: Duplicate Announce ignored") if isdbg('chanerr');
1480                 return;
1481         }
1482
1483         Log('ann', $target, $_[0], $text);
1484
1485         # send it if it isn't the except list and isn't isolated and still has a hop count
1486         # taking into account filtering and so on
1487         foreach $dxchan (@dxchan) {
1488                 next if $dxchan == $main::me;
1489                 next if $dxchan == $self && $self->is_node;
1490                 $dxchan->announce($line, $self->{isolate}, $to, $target, $text, @_, $self->{call}, $ann_dxcc, $ann_itu, $ann_cq, $org_dxcc, $org_itu, $org_cq);
1491         }
1492 }
1493
1494 sub announce
1495 {
1496         my $self = shift;
1497         my $line = shift;
1498         my $isolate = shift;
1499         my $to = shift;
1500         my $target = shift;
1501         my $text = shift;
1502         my ($filter, $hops);
1503
1504         if ($self->{annfilter}) {
1505                 ($filter, $hops) = $self->{annfilter}->it(@_);
1506                 return unless $filter;
1507         }
1508         send_prot_line($self, $filter, $hops, $isolate, $line) unless $_[1] eq $main::mycall;
1509 }
1510
1511
1512 sub send_local_config
1513 {
1514         my $self = shift;
1515         my $n;
1516         my @nodes;
1517         my @localnodes;
1518         my @remotenodes;
1519
1520         dbg('DXProt::send_local_config') if isdbg('trace');
1521
1522         # send our nodes
1523         if ($self->{isolate}) {
1524                 @localnodes = ( $main::routeroot );
1525         } else {
1526                 # create a list of all the nodes that are not connected to this connection
1527                 # and are not themselves isolated, this to make sure that isolated nodes
1528         # don't appear outside of this node
1529                 my @dxchan = grep { $_->call ne $main::mycall && $_ != $self && !$_->{isolate} } DXChannel::get_all_nodes();
1530                 @localnodes = map { my $r = Route::Node::get($_->{call}); $r ? $r : () } @dxchan if @dxchan;
1531                 my @intcalls = map { $_->nodes } @localnodes if @localnodes;
1532                 my $ref = Route::Node::get($self->{call});
1533                 my @rnodes = $ref->nodes;
1534                 for my $n (@intcalls) {
1535                         push @remotenodes, Route::Node::get($n) unless grep $n eq $_, @rnodes;
1536                 }
1537                 unshift @localnodes, $main::routeroot;
1538         }
1539
1540         send_route($self, \&pc19, scalar(@localnodes)+scalar(@remotenodes), @localnodes, @remotenodes);
1541
1542         # get all the users connected on the above nodes and send them out
1543         foreach $n (@localnodes, @remotenodes) {
1544                 if ($n) {
1545                         send_route($self, \&pc16, 1, $n, map {my $r = Route::User::get($_); $r ? ($r) : ()} $n->users);
1546                 } else {
1547                         dbg("sent a null value") if isdbg('chanerr');
1548                 }
1549         }
1550 }
1551
1552 #
1553 # route a message down an appropriate interface for a callsign
1554 #
1555 # is called route(to, pcline);
1556 #
1557 sub route
1558 {
1559         my ($self, $call, $line) = @_;
1560
1561         if (ref $self && $call eq $self->{call}) {
1562                 dbg("PCPROT: Trying to route back to source, dropped") if isdbg('chanerr');
1563                 return;
1564         }
1565
1566         # always send it down the local interface if available
1567         my $dxchan = DXChannel->get($call);
1568         unless ($dxchan) {
1569                 my $cl = Route::get($call);
1570                 $dxchan = $cl->dxchan if $cl;
1571                 if (ref $dxchan) {
1572                         if (ref $self && $dxchan eq $self) {
1573                                 dbg("PCPROT: Trying to route back to source, dropped") if isdbg('chanerr');
1574                                 return;
1575                         }
1576                 }
1577         }
1578         if ($dxchan) {
1579                 my $routeit = adjust_hops($dxchan, $line);   # adjust its hop count by node name
1580                 if ($routeit) {
1581                         $dxchan->send($routeit) unless $dxchan == $main::me;
1582                 }
1583         } else {
1584                 dbg("PCPROT: No route available, dropped") if isdbg('chanerr');
1585         }
1586 }
1587
1588 #
1589 # obtain the hops from the list for this callsign and pc no
1590 #
1591
1592 sub get_hops
1593 {
1594         my $pcno = shift;
1595         my $hops = $DXProt::hopcount{$pcno};
1596         $hops = $DXProt::def_hopcount if !$hops;
1597         return "H$hops";
1598 }
1599
1600 #
1601 # adjust the hop count on a per node basis using the user loadable
1602 # hop table if available or else decrement an existing one
1603 #
1604
1605 sub adjust_hops
1606 {
1607         my $self = shift;
1608         my $s = shift;
1609         my $call = $self->{call};
1610         my $hops;
1611
1612         if (($hops) = $s =~ /\^H(\d+)\^~?$/o) {
1613                 my ($pcno) = $s =~ /^PC(\d\d)/o;
1614                 confess "$call called adjust_hops with '$s'" unless $pcno;
1615                 my $ref = $nodehops{$call} if %nodehops;
1616                 if ($ref) {
1617                         my $newhops = $ref->{$pcno};
1618                         return "" if defined $newhops && $newhops == 0;
1619                         $newhops = $ref->{default} unless $newhops;
1620                         return "" if defined $newhops && $newhops == 0;
1621                         $newhops = $hops if !$newhops;
1622                         $s =~ s/\^H(\d+)(\^~?)$/\^H$newhops$2/ if $newhops;
1623                 } else {
1624                         # simply decrement it
1625                         $hops--;
1626                         return "" if !$hops;
1627                         $s =~ s/\^H(\d+)(\^~?)$/\^H$hops$2/ if $hops;
1628                 }
1629         }
1630         return $s;
1631 }
1632
1633 #
1634 # load hop tables
1635 #
1636 sub load_hops
1637 {
1638         my $self = shift;
1639         return $self->msg('lh1') unless -e "$main::data/hop_table.pl";
1640         do "$main::data/hop_table.pl";
1641         return $@ if $@;
1642         return 0;
1643 }
1644
1645
1646 # add a ping request to the ping queues
1647 sub addping
1648 {
1649         my ($from, $to) = @_;
1650         my $ref = $pings{$to} || [];
1651         my $r = {};
1652         $r->{call} = $from;
1653         $r->{t} = [ gettimeofday ];
1654         route(undef, $to, pc51($to, $main::mycall, 1));
1655         push @$ref, $r;
1656         $pings{$to} = $ref;
1657 }
1658
1659 sub process_rcmd
1660 {
1661         my ($self, $tonode, $fromnode, $user, $cmd) = @_;
1662         if ($tonode eq $main::mycall) {
1663                 my $ref = DXUser->get_current($fromnode);
1664                 my $cref = Route::Node::get($fromnode);
1665                 Log('rcmd', 'in', $ref->{priv}, $fromnode, $cmd);
1666                 if ($cmd !~ /^\s*rcmd/i && $cref && $ref && $cref->call eq $ref->homenode) { # not allowed to relay RCMDS!
1667                         if ($ref->{priv}) {             # you have to have SOME privilege, the commands have further filtering
1668                                 $self->{remotecmd} = 1; # for the benefit of any command that needs to know
1669                                 my $oldpriv = $self->{priv};
1670                                 $self->{priv} = $ref->{priv}; # assume the user's privilege level
1671                                 my @in = (DXCommandmode::run_cmd($self, $cmd));
1672                                 $self->{priv} = $oldpriv;
1673                                 $self->send_rcmd_reply($main::mycall, $fromnode, $user, @in);
1674                                 delete $self->{remotecmd};
1675                         } else {
1676                                 $self->send_rcmd_reply($main::mycall, $fromnode, $user, "sorry...!");
1677                         }
1678                 } else {
1679                         $self->send_rcmd_reply($main::mycall, $fromnode, $user, "your attempt is logged, Tut tut tut...!");
1680                 }
1681         } else {
1682                 my $ref = DXUser->get_current($tonode);
1683                 if ($ref && $ref->is_clx) {
1684                         $self->route($tonode, pc84($fromnode, $tonode, $user, $cmd));
1685                 } else {
1686                         $self->route($tonode, pc34($fromnode, $tonode, $cmd));
1687                 }
1688         }
1689 }
1690
1691 sub process_rcmd_reply
1692 {
1693         my ($self, $tonode, $fromnode, $user, $line) = @_;
1694         if ($tonode eq $main::mycall) {
1695                 my $s = $rcmds{$fromnode};
1696                 if ($s) {
1697                         my $dxchan = DXChannel->get($s->{call});
1698                         my $ref = $user eq $tonode ? $dxchan : (DXChannel->get($user) || $dxchan);
1699                         $ref->send($line) if $ref;
1700                         delete $rcmds{$fromnode} if !$dxchan;
1701                 } else {
1702                         # send unsolicited ones to the sysop
1703                         my $dxchan = DXChannel->get($main::myalias);
1704                         $dxchan->send($line) if $dxchan;
1705                 }
1706         } else {
1707                 my $ref = DXUser->get_current($tonode);
1708                 if ($ref && $ref->is_clx) {
1709                         $self->route($tonode, pc85($fromnode, $tonode, $user, $line));
1710                 } else {
1711                         $self->route($tonode, pc35($fromnode, $tonode, $line));
1712                 }
1713         }
1714 }
1715
1716 sub send_rcmd_reply
1717 {
1718         my $self = shift;
1719         my $tonode = shift;
1720         my $fromnode = shift;
1721         my $user = shift;
1722         while (@_) {
1723                 my $line = shift;
1724                 $line =~ s/\s*$//;
1725                 Log('rcmd', 'out', $fromnode, $line);
1726                 if ($self->is_clx) {
1727                         $self->send(pc85($main::mycall, $fromnode, $user, "$main::mycall:$line"));
1728                 } else {
1729                         $self->send(pc35($main::mycall, $fromnode, "$main::mycall:$line"));
1730                 }
1731         }
1732 }
1733
1734 # add a rcmd request to the rcmd queues
1735 sub addrcmd
1736 {
1737         my ($self, $to, $cmd) = @_;
1738
1739         my $r = {};
1740         $r->{call} = $self->{call};
1741         $r->{t} = $main::systime;
1742         $r->{cmd} = $cmd;
1743         $rcmds{$to} = $r;
1744
1745         my $ref = Route::Node::get($to);
1746         my $dxchan = $ref->dxchan;
1747         if ($dxchan && $dxchan->is_clx) {
1748                 route(undef, $to, pc84($main::mycall, $to, $self->{call}, $cmd));
1749         } else {
1750                 route(undef, $to, pc34($main::mycall, $to, $cmd));
1751         }
1752 }
1753
1754 sub disconnect
1755 {
1756         my $self = shift;
1757         my $pc39flag = shift;
1758         my $call = $self->call;
1759
1760         return if $self->{disconnecting}++;
1761
1762         unless ($pc39flag && $pc39flag == 1) {
1763                 $self->send_now("D", DXProt::pc39($main::mycall, $self->msg('disc1', "System Op")));
1764         }
1765
1766         # do routing stuff
1767         my $node = Route::Node::get($call);
1768         my @rout;
1769         if ($node) {
1770                 @rout = $node->del($main::routeroot);
1771         }
1772
1773         # unbusy and stop and outgoing mail
1774         my $mref = DXMsg::get_busy($call);
1775         $mref->stop_msg($call) if $mref;
1776
1777         # broadcast to all other nodes that all the nodes connected to via me are gone
1778         unless ($pc39flag && $pc39flag == 2) {
1779                 $self->route_pc21(@rout) if @rout;
1780         }
1781
1782         # remove outstanding pings
1783         delete $pings{$call};
1784
1785         # I was the last node visited
1786     $self->user->node($main::mycall);
1787
1788         # send info to all logged in thingies
1789         $self->tell_login('logoutn');
1790
1791         Log('DXProt', $call . " Disconnected");
1792
1793         $self->SUPER::disconnect;
1794 }
1795
1796
1797 #
1798 # send a talk message to this thingy
1799 #
1800 sub talk
1801 {
1802         my ($self, $from, $to, $via, $line, $origin) = @_;
1803
1804         $line =~ s/\^/\\5E/g;                   # remove any ^ characters
1805         $self->send(DXProt::pc10($from, $to, $via, $line, $origin));
1806         Log('talk', $to, $from, $via?$via:$self->call, $line) unless $origin && $origin ne $main::mycall;
1807 }
1808
1809 # send it if it isn't the except list and isn't isolated and still has a hop count
1810 # taking into account filtering and so on
1811 sub send_route
1812 {
1813         my $self = shift;
1814         my $generate = shift;
1815         my $no = shift;     # the no of things to filter on
1816         my $routeit;
1817         my ($filter, $hops);
1818         my @rin;
1819
1820         for (; @_ && $no; $no--) {
1821                 my $r = shift;
1822
1823                 if (!$self->{isolate} && $self->{routefilter}) {
1824                         $filter = undef;
1825                         if ($r) {
1826                                 ($filter, $hops) = $self->{routefilter}->it($self->{call}, $self->{dxcc}, $self->{itu}, $self->{cq}, $r->call, $r->dxcc, $r->itu, $r->cq);
1827                                 if ($filter) {
1828                                         push @rin, $r;
1829                                 } else {
1830                                         dbg("DXPROT: $self->{call}/" . $r->call . " rejected by output filter") if isdbg('chanerr');
1831                                 }
1832                         } else {
1833                                 dbg("was sent a null value") if isdbg('chanerr');
1834                         }
1835                 } else {
1836                         push @rin, $r unless $self->{isolate} && $r->call ne $main::mycall;
1837                 }
1838         }
1839         if (@rin) {
1840                 foreach my $line (&$generate(@rin, @_)) {
1841                         if ($hops) {
1842                                 $routeit = $line;
1843                                 $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
1844                         } else {
1845                                 $routeit = adjust_hops($self, $line);  # adjust its hop count by node name
1846                                 next unless $routeit;
1847                         }
1848                         $self->send($routeit);
1849                 }
1850         }
1851 }
1852
1853 sub broadcast_route
1854 {
1855         my $self = shift;
1856         my $generate = shift;
1857         my @dxchan = DXChannel::get_all_nodes();
1858         my $dxchan;
1859         my $line;
1860
1861         unless ($self->{isolate}) {
1862                 foreach $dxchan (@dxchan) {
1863                         next if $dxchan == $self;
1864                         next if $dxchan == $main::me;
1865                         $dxchan->send_route($generate, @_);
1866                 }
1867         }
1868 }
1869
1870 sub route_pc16
1871 {
1872         my $self = shift;
1873         broadcast_route($self, \&pc16, 1, @_);
1874 }
1875
1876 sub route_pc17
1877 {
1878         my $self = shift;
1879         broadcast_route($self, \&pc17, 1, @_);
1880 }
1881
1882 sub route_pc19
1883 {
1884         my $self = shift;
1885         broadcast_route($self, \&pc19, scalar @_, @_);
1886 }
1887
1888 sub route_pc21
1889 {
1890         my $self = shift;
1891         broadcast_route($self, \&pc21, scalar @_, @_);
1892 }
1893
1894 sub route_pc24
1895 {
1896         my $self = shift;
1897         broadcast_route($self, \&pc24, 1, @_);
1898 }
1899
1900 sub route_pc41
1901 {
1902         my $self = shift;
1903         broadcast_route($self, \&pc41, 1, @_);
1904 }
1905
1906 sub route_pc50
1907 {
1908         my $self = shift;
1909         broadcast_route($self, \&pc50, 1, @_);
1910 }
1911
1912 sub in_filter_route
1913 {
1914         my $self = shift;
1915         my $r = shift;
1916         my ($filter, $hops) = (1, 1);
1917
1918         if ($self->{inroutefilter}) {
1919                 ($filter, $hops) = $self->{inroutefilter}->it($self->{call}, $self->{dxcc}, $self->{itu}, $self->{cq}, $r->call, $r->dxcc, $r->itu, $r->cq);
1920                 dbg("PCPROT: $self->{call}/" . $r->call . ' rejected by in_filter_route') if !$filter && isdbg('chanerr');
1921         }
1922         return $filter;
1923 }
1924
1925 sub eph_dup
1926 {
1927         my $s = shift;
1928         my $t = shift || $eph_restime;
1929         my $r;
1930
1931         # chop the end off
1932         $s =~ s/\^H\d\d?\^?\~?$//;
1933         $r = 1 if exists $eph{$s};    # pump up the dup if it keeps circulating
1934         $eph{$s} = $main::systime + $t;
1935         return $r;
1936 }
1937
1938 sub eph_del_regex
1939 {
1940         my $regex = shift;
1941         my ($key, $val);
1942         while (($key, $val) = each %eph) {
1943                 if ($key =~ m{$regex}) {
1944                         delete $eph{$key};
1945                 }
1946         }
1947 }
1948
1949 sub eph_clean
1950 {
1951         my ($key, $val);
1952
1953         while (($key, $val) = each %eph) {
1954                 if ($main::systime >= $val) {
1955                         delete $eph{$key};
1956                 }
1957         }
1958 }
1959
1960 sub eph_list
1961 {
1962         my ($key, $val);
1963         my @out;
1964
1965         while (($key, $val) = each %eph) {
1966                 push @out, $key, $val;
1967         }
1968         return @out;
1969 }
1970
1971 sub run_cmd
1972 {
1973         goto &DXCommandmode::run_cmd;
1974 }
1975 1;
1976 __END__