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 DXCluster;
  19 use DXProtVars;
  20 use DXCommandmode;
  21 use DXLog;
  22 use Spot;
  23 use DXProtout;
  24 use DXDebug;
  25 use Filter;
  26 use Local;
  27
  28 use Carp;
  29
  30 use strict;
  31 use vars qw($me $pc11_max_age $pc23_max_age $pc11_dup_age $pc23_dup_age
  32                         %spotdup %wwvdup $last_hour %pings %rcmds
  33                         %nodehops @baddx $baddxfn $pc12_dup_age
  34                         %anndup $allowzero $pc12_dup_lth $decode_dk0wcy);
  35
  36 $me = undef;                                    # the channel id for this cluster
  37 $decode_dk0wcy = undef;                 # if set use this callsign to decode announces from the EU WWV data beacon
  38 $pc11_max_age = 1*3600;                 # the maximum age for an incoming 'real-time' pc11
  39 $pc23_max_age = 1*3600;                 # the maximum age for an incoming 'real-time' pc23
  40 $pc11_dup_age = 24*3600;                # the maximum time to keep the spot dup list for
  41 $pc23_dup_age = 24*3600;                # the maximum time to keep the wwv dup list for
  42 $pc12_dup_age = 12*3600;                # the maximum time to keep the ann dup list for
  43 $pc12_dup_lth = 72;                             # the length of ANN text to save for deduping
  44 %spotdup = ();                              # the pc11 and 26 dup hash
  45 %wwvdup = ();                               # the pc23 and 27 dup hash
  46 %anndup = ();                               # the PC12 dup hash
  47 $last_hour = time;                              # last time I did an hourly periodic update
  48 %pings = ();                    # outstanding ping requests outbound
  49 %rcmds = ();                    # outstanding rcmd requests outbound
  50 %nodehops = ();                 # node specific hop control
  51 @baddx = ();                    # list of illegal spotted callsigns
  52
  53 $baddxfn = "$main::data/baddx.pl";
  54
  55 sub init
  56 {
  57         my $user = DXUser->get($main::mycall);
  58         $DXProt::myprot_version += $main::version*100;
  59         $me = DXProt->new($main::mycall, 0, $user);
  60         $me->{here} = 1;
  61         $me->{state} = "indifferent";
  62         do "$main::data/hop_table.pl" if -e "$main::data/hop_table.pl";
  63         confess $@ if $@;
  64         #  $me->{sort} = 'M';    # M for me
  65
  66         # now prime the spot duplicates file with today's and yesterday's data
  67     my @today = Julian::unixtoj(time);
  68         my @spots = Spot::readfile(@today);
  69         @today = Julian::sub(@today, 1);
  70         push @spots, Spot::readfile(@today);
  71         for (@spots) {
  72                 my $dupkey = "$_->[0]$_->[1]$_->[2]$_->[3]$_->[4]";
  73                 $spotdup{$dupkey} = $_->[2];
  74         }
  75
  76         # now prime the wwv duplicates file with just this month's data
  77         my @wwv = Geomag::readfile(time);
  78         for (@wwv) {
  79                 my $dupkey = "$_->[1].$_->[2]$_->[3]$_->[4]";
  80                 $wwvdup{$dupkey} = $_->[1];
  81         }
  82
  83         # load the baddx file
  84         do "$baddxfn" if -e "$baddxfn";
  85         print "$@\n" if $@;
  86 }
  87
  88 #
  89 # obtain a new connection this is derived from dxchannel
  90 #
  91
  92 sub new
  93 {
  94         my $self = DXChannel::alloc(@_);
  95         $self->{'sort'} = 'A';          # in absence of how to find out what sort of an object I am
  96         return $self;
  97 }
  98
  99 # this is how a pc connection starts (for an incoming connection)
 100 # issue a PC38 followed by a PC18, then wait for a PC20 (remembering
 101 # all the crap that comes between).
 102 sub start
 103 {
 104         my ($self, $line, $sort) = @_;
 105         my $call = $self->{call};
 106         my $user = $self->{user};
 107
 108         # remember type of connection
 109         $self->{consort} = $line;
 110         $self->{outbound} = $sort eq 'O';
 111         $self->{priv} = $user->priv;
 112         $self->{lang} = $user->lang;
 113         $self->{isolate} = $user->{isolate};
 114         $self->{consort} = $line;       # save the connection type
 115         $self->{here} = 1;
 116
 117         # get the filters
 118         $self->{spotfilter} = Filter::read_in('spots', $call);
 119         $self->{wwvfilter} = Filter::read_in('wwv', $call);
 120         $self->{annfilter} = Filter::read_in('ann', $call);
 121
 122         # set unbuffered and no echo
 123         $self->send_now('B',"0");
 124         $self->send_now('E',"0");
 125
 126         # send initialisation string
 127         if (!$self->{outbound}) {
 128                 $self->send(pc38()) if DXNode->get_all();
 129                 $self->send(pc18());
 130         }
 131         $self->state('init');
 132         $self->pc50_t(time);
 133
 134         Log('DXProt', "$call connected");
 135 }
 136
 137 #
 138 # This is the normal pcxx despatcher
 139 #
 140 sub normal
 141 {
 142         my ($self, $line) = @_;
 143         my @field = split /\^/, $line;
 144         pop @field if $field[-1] eq '~';
 145
 146 #       print join(',', @field), "\n";
 147
 148         # ignore any lines that don't start with PC
 149         return if !$field[0] =~ /^PC/;
 150
 151         # process PC frames
 152         my ($pcno) = $field[0] =~ /^PC(\d\d)/; # just get the number
 153         return unless $pcno;
 154         return if $pcno < 10 || $pcno > 51;
 155
 156         # dump bad protocol messages unless it is a PC29
 157         if ($line =~ /\%[0-9A-F][0-9A-F]/o && $pcno != 29) {
 158                 dbg('chan', "CORRUPT protocol message - dumped");
 159                 return;
 160         }
 161
 162         # local processing 1
 163         my $pcr;
 164         eval {
 165                 $pcr = Local::pcprot($self, $pcno, @field);
 166         };
 167 #       dbg('local', "Local::pcprot error $@") if $@;
 168         return if $pcr;
 169
 170  SWITCH: {
 171                 if ($pcno == 10) {              # incoming talk
 172
 173                         # is it for me or one of mine?
 174                         my $call = ($field[5] gt ' ') ? $field[5] : $field[2];
 175                         if ($call eq $main::mycall || grep $_ eq $call, get_all_user_calls()) {
 176
 177                                 # yes, it is
 178                                 my $text = unpad($field[3]);
 179                                 Log('talk', $call, $field[1], $field[6], $text);
 180                                 $call = $main::myalias if $call eq $main::mycall;
 181                                 my $ref = DXChannel->get($call);
 182                                 $ref->send("$call de $field[1]: $text") if $ref && $ref->{talk};
 183                         } else {
 184                                 route($field[2], $line); # relay it on its way
 185                         }
 186                         return;
 187                 }
 188
 189                 if ($pcno == 11 || $pcno == 26) { # dx spot
 190
 191                         # route 'foreign' pc26s
 192                         if ($pcno == 26) {
 193                                 if ($field[7] ne $main::mycall) {
 194                                         route($field[7], $line);
 195                                         return;
 196                                 }
 197                         }
 198
 199                         # if this is a 'nodx' node then ignore it
 200                         last SWITCH if grep $field[7] =~ /^$_/,  @DXProt::nodx_node;
 201
 202                         # convert the date to a unix date
 203                         my $d = cltounix($field[3], $field[4]);
 204                         # bang out (and don't pass on) if date is invalid or the spot is too old (or too young)
 205                         if (!$d || ($pcno == 11 && ($d < $main::systime - $pc11_max_age || $d > $main::systime + 900))) {
 206                                 dbg('chan', "Spot ignored, invalid date or out of range ($field[3] $field[4])\n");
 207                                 return;
 208                         }
 209
 210                         # strip off the leading & trailing spaces from the comment
 211                         my $text = unpad($field[5]);
 212
 213                         # store it away
 214                         my $spotter = $field[6];
 215                         $spotter =~ s/-[\@\d]+$//o;     # strip off the ssid from the spotter
 216
 217                         # do some de-duping
 218                         my $freq = $field[1] - 0;
 219                         my $dupkey = "$freq$field[2]$d$text$spotter";
 220                         if ($spotdup{$dupkey}) {
 221                                 dbg('chan', "Duplicate Spot ignored\n");
 222                                 return;
 223                         }
 224
 225                         $spotdup{$dupkey} = $d;
 226
 227                         # is it 'baddx'
 228                         if (grep $field[2] eq $_, @baddx) {
 229                                 dbg('chan', "Bad DX spot, ignored");
 230                                 return;
 231                         }
 232
 233                         # are any of the crucial fields invalid?
 234             if ($field[2] =~ /[a-z]/ || $field[6] =~ /[a-z]/ || $field[7] =~ /[a-z]/) {
 235                                 dbg('chan', "Spot contains lower case callsigns, rejected");
 236                                 return;
 237                         }
 238
 239                         my @spot = Spot::add($freq, $field[2], $d, $text, $spotter, $field[7]);
 240
 241             #
 242                         # @spot at this point contains:-
 243             # freq, spotted call, time, text, spotter, spotted cc, spotters cc, orig node
 244                         # then  spotted itu, spotted cq, spotters itu, spotters cq
 245                         # you should be able to route on any of these
 246             #
 247
 248                         # local processing
 249                         my $r;
 250                         eval {
 251                                 $r = Local::spot($self, @spot);
 252                         };
 253 #                       dbg('local', "Local::spot1 error $@") if $@;
 254                         return if $r;
 255
 256                         # DON'T be silly and send on PC26s!
 257                         return if $pcno == 26;
 258
 259                         # send out the filtered spots
 260                         send_dx_spot($self, $line, @spot) if @spot;
 261                         return;
 262                 }
 263
 264                 if ($pcno == 12) {              # announces
 265                         # announce duplicate checking
 266                         my $text = substr(uc unpad($field[3]), 0, $pc12_dup_lth);
 267                         my $dupkey = $field[1].$field[2].$text.$field[4].$field[6];
 268                         if ($anndup{$dupkey}) {
 269                                 dbg('chan', "Duplicate Announce ignored\n");
 270                                 return;
 271                         }
 272                         $anndup{$dupkey} = $main::systime;
 273
 274                         # global ann filtering on INPUT
 275                         my ($filter, $hops) = Filter::it($self->{annfilter}, @field[1..6], $self->{call} ) if $self->{annfilter};
 276                         if ($self->{annfilter} && !$filter) {
 277                                 dbg('chan', "Rejected by filter");
 278                                 return;
 279                         }
 280
 281                         if ($field[2] eq '*' || $field[2] eq $main::mycall) {
 282
 283                                 # strip leading and trailing stuff
 284                                 my $text = unpad($field[3]);
 285                                 my $target;
 286                                 my $to = 'To ';
 287                                 my @list;
 288
 289                                 if ($field[4] eq '*') { # sysops
 290                                         $target = "SYSOP";
 291                                         @list = map { $_->priv >= 5 ? $_ : () } get_all_users();
 292                                 } elsif ($field[4] gt ' ') { # speciality list handling
 293                                         my ($name) = split /\./, $field[4];
 294                                         $target = "$name"; # put the rest in later (if bothered)
 295                                 }
 296
 297                                 if ($field[6] eq '1') {
 298                                         $target = "WX";
 299                                         $to = '';
 300                                 }
 301                                 $target = "All" if !$target;
 302
 303                                 if (@list > 0) {
 304                                         broadcast_list("$to$target de $field[1]: $text", 'ann', undef, @list);
 305                                 } else {
 306                                         broadcast_users("$target de $field[1]: $text", 'ann', undef);
 307                                 }
 308                                 Log('ann', $target, $field[1], $text);
 309
 310                                 if ($decode_dk0wcy && $field[1] eq $decode_dk0wcy) {
 311                                         my ($hour, $k, $next, $a, $r, $sfi, $alarm) = $field[3] =~ /^Aurora Beacon\s+(\d+)UTC,\s+Kiel\s+K=(\d+),.*ed\s+K=(\d+),\s+A=(\d+),\s+R=(\d+),\s+SFI=(\d+),.*larm:\s+(\w+)/;
 312                                         $alarm = ($alarm =~ /^Y/i) ? ', Aurora in DE' : '';
 313                                         my $wwv = Geomag::update($main::systime, $hour, $sfi, $a, $k, "R=$r, Next K=$next$alarm", $decode_dk0wcy, $field[5], $r);
 314                                 }
 315
 316                                 return if $field[2] eq $main::mycall; # it's routed to me
 317                         } else {
 318                                 route($field[2], $line);
 319                                 return;                 # only on a routed one
 320                         }
 321
 322                         last SWITCH;
 323                 }
 324
 325                 if ($pcno == 13) {
 326                         last SWITCH;
 327                 }
 328                 if ($pcno == 14) {
 329                         last SWITCH;
 330                 }
 331                 if ($pcno == 15) {
 332                         last SWITCH;
 333                 }
 334
 335                 if ($pcno == 16) {              # add a user
 336                         my $node = DXCluster->get_exact($field[1]);
 337                         return unless $node; # ignore if havn't seen a PC19 for this one yet
 338                         return unless $node->isa('DXNode');
 339                         if ($node->dxchan != $self) {
 340                                 dbg('chan', "LOOP: $field[1] came in on wrong channel");
 341                                 return;
 342                         }
 343                         my $dxchan;
 344                         if (($dxchan = DXChannel->get($field[1])) && $dxchan != $self) {
 345                                 dbg('chan', "LOOP: $field[1] connected locally");
 346                                 return;
 347                         }
 348                         my $i;
 349
 350
 351                         for ($i = 2; $i < $#field; $i++) {
 352                                 my ($call, $confmode, $here) = $field[$i] =~ /^(\S+) (\S) (\d)/o;
 353                                 next if !$call || length $call < 3 || length $call > 8;
 354                                 next if !$confmode;
 355                                 $call = uc $call;
 356                                 next if DXCluster->get_exact($call); # we already have this (loop?)
 357
 358                                 $confmode = $confmode eq '*';
 359                                 DXNodeuser->new($self, $node, $call, $confmode, $here);
 360
 361                                 # add this station to the user database, if required
 362                                 $call =~ s/-\d+$//o;        # remove ssid for users
 363                                 my $user = DXUser->get_current($call);
 364                                 $user = DXUser->new($call) if !$user;
 365                                 $user->homenode($node->call) if !$user->homenode;
 366                                 $user->node($node->call);
 367                                 $user->lastin($main::systime) unless DXChannel->get($call);
 368                                 $user->put;
 369                         }
 370
 371                         # queue up any messages (look for privates only)
 372                         DXMsg::queue_msg(1) if $self->state eq 'normal';
 373                         last SWITCH;
 374                 }
 375
 376                 if ($pcno == 17) {              # remove a user
 377                         my $node = DXCluster->get_exact($field[2]);
 378                         return unless $node;
 379                         return unless $node->isa('DXNode');
 380                         if ($node->dxchan != $self) {
 381                                 dbg('chan', "LOOP: $field[2] came in on wrong channel");
 382                                 return;
 383                         }
 384                         my $dxchan;
 385                         if (($dxchan = DXChannel->get($field[2])) && $dxchan != $self) {
 386                                 dbg('chan', "LOOP: $field[2] connected locally");
 387                                 return;
 388                         }
 389                         my $ref = DXCluster->get_exact($field[1]);
 390                         $ref->del() if $ref;
 391                         last SWITCH;
 392                 }
 393
 394                 if ($pcno == 18) {              # link request
 395                         $self->state('init');
 396
 397                         # first clear out any nodes on this dxchannel
 398                         my @gonenodes = map { $_->dxchan == $self ? $_ : () } DXNode::get_all();
 399                         foreach my $node (@gonenodes) {
 400                                 next if $node->dxchan == $DXProt::me;
 401                                 broadcast_ak1a(pc21($node->call, 'Gone, re-init') , $self) unless $self->{isolate};
 402                                 $node->del();
 403                         }
 404                         $self->send_local_config();
 405                         $self->send(pc20());
 406                         return;             # we don't pass these on
 407                 }
 408
 409                 if ($pcno == 19) {              # incoming cluster list
 410                         my $i;
 411                         my $newline = "PC19^";
 412                         for ($i = 1; $i < $#field-1; $i += 4) {
 413                                 my $here = $field[$i];
 414                                 my $call = uc $field[$i+1];
 415                                 my $confmode = $field[$i+2];
 416                                 my $ver = $field[$i+3];
 417
 418                                 $ver = 5400 if !$ver && $allowzero;
 419
 420                                 # now check the call over
 421                                 my $node = DXCluster->get_exact($call);
 422                                 if ($node) {
 423                                         my $dxchan;
 424                                         if (($dxchan = DXChannel->get($call)) && $dxchan != $self) {
 425                                                 dbg('chan', "LOOP: $call connected locally");
 426                                         }
 427                                     if ($node->dxchan != $self) {
 428                                                 dbg('chan', "LOOP: $call come in on wrong channel");
 429                                                 next;
 430                                         }
 431                                         dbg('chan', "already have $call");
 432                                         next;
 433                                 }
 434
 435                                 # check for sane parameters
 436                                 next if $ver < 5000; # only works with version 5 software
 437                                 next if length $call < 3; # min 3 letter callsigns
 438
 439                                 # add it to the nodes table and outgoing line
 440                                 $newline .= "$here^$call^$confmode^$ver^";
 441                                 DXNode->new($self, $call, $confmode, $here, $ver);
 442
 443                                 # unbusy and stop and outgoing mail (ie if somehow we receive another PC19 without a disconnect)
 444                                 my $mref = DXMsg::get_busy($call);
 445                                 $mref->stop_msg($call) if $mref;
 446
 447                                 # add this station to the user database, if required (don't remove SSID from nodes)
 448                                 my $user = DXUser->get_current($call);
 449                                 if (!$user) {
 450                                         $user = DXUser->new($call);
 451                                         $user->sort('A');
 452                                         $user->priv(1);                   # I have relented and defaulted nodes
 453                                         $self->{priv} = 1;                # to user RCMDs allowed
 454                                         $user->homenode($call);
 455                                         $user->node($call);
 456                                 }
 457                                 $user->lastin($main::systime) unless DXChannel->get($call);
 458                                 $user->put;
 459                         }
 460
 461                         return if $newline eq "PC19^";
 462
 463                         # add hop count
 464                         $newline .=  get_hops(19) . "^";
 465                         $line = $newline;
 466                         last SWITCH;
 467                 }
 468
 469                 if ($pcno == 20) {              # send local configuration
 470                         $self->send_local_config();
 471                         $self->send(pc22());
 472                         $self->state('normal');
 473                         return;
 474                 }
 475
 476                 if ($pcno == 21) {              # delete a cluster from the list
 477                         my $call = uc $field[1];
 478                         if ($call ne $main::mycall) { # don't allow malicious buggers to disconnect me!
 479                                 my $node = DXCluster->get_exact($call);
 480                                 if ($node) {
 481                                         if ($node->dxchan != $self) {
 482                                                 dbg('chan', "LOOP: $call come in on wrong channel");
 483                                                 return;
 484                                         }
 485                                         my $dxchan;
 486                                         if (($dxchan = DXChannel->get($call)) && $dxchan != $self) {
 487                                                 dbg('chan', "LOOP: $call connected locally");
 488                                                 return;
 489                                         }
 490                                         $node->del();
 491                                 } else {
 492                                         dbg('chan', "$call not in table, dropped");
 493                                         return;
 494                                 }
 495                         }
 496                         last SWITCH;
 497                 }
 498
 499                 if ($pcno == 22) {
 500                         $self->state('normal');
 501                         return;
 502                 }
 503
 504                 if ($pcno == 23 || $pcno == 27) { # WWV info
 505
 506                         # route 'foreign' pc27s
 507                         if ($pcno == 27) {
 508                                 if ($field[8] ne $main::mycall) {
 509                                         route($field[8], $line);
 510                                         return;
 511                                 }
 512                         }
 513
 514                         # do some de-duping
 515                         my $d = cltounix($field[1], sprintf("%02d18Z", $field[2]));
 516                         my $sfi = unpad($field[3]);
 517                         my $k = unpad($field[4]);
 518                         my $i = unpad($field[5]);
 519                         my $r = $field[6] =~ /R=(\d+)/ || 0;
 520                         my $dupkey = "$d.$sfi$k$i";
 521                         if ($wwvdup{$dupkey}) {
 522                                 dbg('chan', "Dup WWV Spot ignored\n");
 523                                 return;
 524                         }
 525                         if (($pcno == 23 && $d < $main::systime - $pc23_max_age) || $d > $main::systime + 900 || $field[2] < 0 || $field[2] > 23) {
 526                                 dbg('chan', "WWV Date ($field[1] $field[2]) out of range");
 527                                 return;
 528                         }
 529                         $wwvdup{$dupkey} = $d;
 530                         $field[6] =~ s/-\d+$//o;            # remove spotter's ssid
 531
 532                         my $wwv = Geomag::update($d, $field[2], $sfi, $k, $i, @field[6..8], $r);
 533
 534                         my $rep;
 535                         eval {
 536                                 $rep = Local::wwv($self, $field[1], $field[2], $sfi, $k, $i, @field[6..8], $r);
 537                         };
 538 #                       dbg('local', "Local::wwv2 error $@") if $@;
 539                         return if $rep;
 540
 541                         # DON'T be silly and send on PC27s!
 542                         return if $pcno == 27;
 543
 544                         # broadcast to the eager world
 545                         send_wwv_spot($self, $line, $d, $field[2], $sfi, $k, $i, @field[6..8]);
 546                         return;
 547                 }
 548
 549                 if ($pcno == 24) {              # set here status
 550                         my $call = uc $field[1];
 551                         my $ref = DXCluster->get_exact($call);
 552                         $ref->here($field[2]) if $ref;
 553                         last SWITCH;
 554                 }
 555
 556                 if ($pcno == 25) {      # merge request
 557                         if ($field[1] ne $main::mycall) {
 558                                 route($field[1], $line);
 559                                 return;
 560                         }
 561                         if ($field[2] eq $main::mycall) {
 562                                 dbg('chan', "Trying to merge to myself, ignored");
 563                                 return;
 564                         }
 565
 566                         Log('DXProt', "Merge request for $field[3] spots and $field[4] WWV from $field[1]");
 567
 568                         # spots
 569                         if ($field[3] > 0) {
 570                                 my @in = reverse Spot::search(1, undef, undef, 0, $field[3]);
 571                                 my $in;
 572                                 foreach $in (@in) {
 573                                         $self->send(pc26(@{$in}[0..4], $field[2]));
 574                                 }
 575                         }
 576
 577                         # wwv
 578                         if ($field[4] > 0) {
 579                                 my @in = reverse Geomag::search(0, $field[4], time, 1);
 580                                 my $in;
 581                                 foreach $in (@in) {
 582                                         $self->send(pc27(@{$in}[0..5], $field[2]));
 583                                 }
 584                         }
 585                         return;
 586                 }
 587
 588                 if (($pcno >= 28 && $pcno <= 33) || $pcno == 40 || $pcno == 42 || $pcno == 49) { # mail/file handling
 589                         if ($pcno == 49 || $field[1] eq $main::mycall) {
 590                                 DXMsg::process($self, $line);
 591                         } else {
 592                                 route($field[1], $line);
 593                         }
 594                         return;
 595                 }
 596
 597                 if ($pcno == 34 || $pcno == 36) { # remote commands (incoming)
 598                         if ($field[1] eq $main::mycall) {
 599                                 my $ref = DXUser->get_current($field[2]);
 600                                 my $cref = DXCluster->get($field[2]);
 601                                 Log('rcmd', 'in', $ref->{priv}, $field[2], $field[3]);
 602                                 unless ($field[3] =~ /rcmd/i || !$cref || !$ref || $cref->mynode->call ne $ref->homenode) {    # not allowed to relay RCMDS!
 603                                         if ($ref->{priv}) {     # you have to have SOME privilege, the commands have further filtering
 604                                                 $self->{remotecmd} = 1; # for the benefit of any command that needs to know
 605                                                 my $oldpriv = $self->{priv};
 606                                                 $self->{priv} = $ref->{priv};     # assume the user's privilege level
 607                                                 my @in = (DXCommandmode::run_cmd($self, $field[3]));
 608                                                 $self->{priv} = $oldpriv;
 609                                                 for (@in) {
 610                                                         s/\s*$//og;
 611                                                         $self->send(pc35($main::mycall, $field[2], "$main::mycall:$_"));
 612                                                         Log('rcmd', 'out', $field[2], $_);
 613                                                 }
 614                                                 delete $self->{remotecmd};
 615                                         } else {
 616                                                 $self->send(pc35($main::mycall, $field[2], "$main::mycall:sorry...!"));
 617                                         }
 618                                 } else {
 619                                         $self->send(pc35($main::mycall, $field[2], "$main::mycall:your attempt is logged, Tut tut tut...!"));
 620                                 }
 621                         } else {
 622                                 route($field[1], $line);
 623                         }
 624                         return;
 625                 }
 626
 627                 if ($pcno == 35) {              # remote command replies
 628                         if ($field[1] eq $main::mycall) {
 629                                 my $s = $rcmds{$field[2]};
 630                                 if ($s) {
 631                                         my $dxchan = DXChannel->get($s->{call});
 632                                         $dxchan->send($field[3]) if $dxchan;
 633                                         delete $rcmds{$field[2]} if !$dxchan;
 634                                 }
 635                         } else {
 636                                 route($field[1], $line);
 637                         }
 638                         return;
 639                 }
 640
 641                 # for pc 37 see 44 onwards
 642
 643                 if ($pcno == 38) {              # node connected list from neighbour
 644                         return;
 645                 }
 646
 647                 if ($pcno == 39) {              # incoming disconnect
 648                         $self->disconnect();
 649                         return;
 650                 }
 651
 652                 if ($pcno == 41) {              # user info
 653                         # add this station to the user database, if required
 654                         my $user = DXUser->get_current($field[1]);
 655                         if (!$user) {
 656                                 # then try without an SSID
 657                                 $field[1] =~ s/-\d+$//o;
 658                                 $user = DXUser->get_current($field[1]);
 659                         }
 660                         $user = DXUser->new($field[1]) if !$user;
 661
 662                         if ($field[2] == 1) {
 663                                 $user->name($field[3]);
 664                         } elsif ($field[2] == 2) {
 665                                 $user->qth($field[3]);
 666                         } elsif ($field[2] == 3) {
 667                                 my ($lat, $long) = DXBearing::stoll($field[3]);
 668                                 $user->lat($lat);
 669                                 $user->long($long);
 670                         } elsif ($field[2] == 4) {
 671                                 $user->homenode($field[3]);
 672                         }
 673                         $user->put;
 674                         last SWITCH;
 675                 }
 676                 if ($pcno == 43) {
 677                         last SWITCH;
 678                 }
 679                 if ($pcno == 37 || $pcno == 44 || $pcno == 45 || $pcno == 46 || $pcno == 47) {
 680                         if ($field[1] eq $main::mycall) {
 681                                 ;
 682                         } else {
 683                                 route($field[1], $line);
 684                         }
 685                         return;
 686                 }
 687
 688                 if ($pcno == 50) {              # keep alive/user list
 689                         my $node = DXCluster->get_exact($field[1]);
 690                         if ($node) {
 691                                 return unless $node->isa('DXNode');
 692                                 return unless $node->dxchan == $self;
 693                                 $node->update_users($field[2]);
 694                         }
 695                         last SWITCH;
 696                 }
 697
 698                 if ($pcno == 51) {              # incoming ping requests/answers
 699
 700                         # is it for us?
 701                         if ($field[1] eq $main::mycall) {
 702                                 my $flag = $field[3];
 703                                 if ($flag == 1) {
 704                                         $self->send(pc51($field[2], $field[1], '0'));
 705                                 } else {
 706                                         # it's a reply, look in the ping list for this one
 707                                         my $ref = $pings{$field[2]};
 708                                         if ($ref) {
 709                                                 my $r = shift @$ref;
 710                                                 my $dxchan = DXChannel->get($r->{call});
 711                                                 $dxchan->send($dxchan->msg('pingi', $field[2], atime($main::systime), $main::systime - $r->{t})) if $dxchan;
 712                                         }
 713                                 }
 714
 715                         } else {
 716                                 # route down an appropriate thingy
 717                                 route($field[1], $line);
 718                         }
 719                         return;
 720                 }
 721         }
 722
 723          # if get here then rebroadcast the thing with its Hop count decremented (if
 724          # there is one). If it has a hop count and it decrements to zero then don't
 725          # rebroadcast it.
 726          #
 727          # NOTE - don't arrive here UNLESS YOU WANT this lump of protocol to be
 728          #        REBROADCAST!!!!
 729          #
 730
 731         if (!$self->{isolate}) {
 732                 broadcast_ak1a($line, $self); # send it to everyone but me
 733         }
 734 }
 735
 736 #
 737 # This is called from inside the main cluster processing loop and is used
 738 # for despatching commands that are doing some long processing job
 739 #
 740 sub process
 741 {
 742         my $t = time;
 743         my @dxchan = DXChannel->get_all();
 744         my $dxchan;
 745
 746         foreach $dxchan (@dxchan) {
 747                 next unless $dxchan->is_ak1a();
 748                 next if $dxchan == $me;
 749
 750                 # send a pc50 out on this channel
 751                 if ($t >= $dxchan->pc50_t + $DXProt::pc50_interval) {
 752                         $dxchan->send(pc50());
 753                         $dxchan->pc50_t($t);
 754                 }
 755         }
 756
 757         my $key;
 758         my $val;
 759         my $cutoff;
 760         if ($main::systime - 3600 > $last_hour) {
 761                 $cutoff  = $main::systime - $pc11_dup_age;
 762                 while (($key, $val) = each %spotdup) {
 763                         delete $spotdup{$key} if $val < $cutoff;
 764                 }
 765                 $cutoff = $main::systime - $pc23_dup_age;
 766                 while (($key, $val) = each %wwvdup) {
 767                         delete $wwvdup{$key} if $val < $cutoff;
 768                 }
 769                 $cutoff = $main::systime - $pc12_dup_age;
 770                 while (($key, $val) = each %anndup) {
 771                         delete $anndup{$key} if $val < $cutoff;
 772                 }
 773                 $last_hour = $main::systime;
 774         }
 775 }
 776
 777 #
 778 # finish up a pc context
 779 #
 780 sub finish
 781 {
 782         my $self = shift;
 783         my $call = $self->call;
 784         my $ref = DXCluster->get_exact($call);
 785
 786         # unbusy and stop and outgoing mail
 787         my $mref = DXMsg::get_busy($call);
 788         $mref->stop_msg($call) if $mref;
 789
 790         # broadcast to all other nodes that all the nodes connected to via me are gone
 791         my @gonenodes = map { $_->dxchan == $self ? $_ : () } DXNode::get_all();
 792         my $node;
 793
 794         foreach $node (@gonenodes) {
 795                 next if $node->call eq $call;
 796                 broadcast_ak1a(pc21($node->call, 'Gone') , $self) unless $self->{isolate};
 797                 $node->del();
 798         }
 799
 800         # remove outstanding pings
 801         delete $pings{$call};
 802
 803         # now broadcast to all other ak1a nodes that I have gone
 804         broadcast_ak1a(pc21($call, 'Gone.'), $self) unless $self->{isolate};
 805
 806         Log('DXProt', $call . " Disconnected");
 807         $ref->del() if $ref;
 808 }
 809
 810 #
 811 # some active measures
 812 #
 813 sub send_dx_spot
 814 {
 815         my $self = shift;
 816         my $line = shift;
 817         my @dxchan = DXChannel->get_all();
 818         my $dxchan;
 819
 820         # send it if it isn't the except list and isn't isolated and still has a hop count
 821         # taking into account filtering and so on
 822         foreach $dxchan (@dxchan) {
 823                 my $routeit;
 824                 my ($filter, $hops);
 825
 826                 if ($dxchan->{spotfilter}) {
 827                     ($filter, $hops) = Filter::it($dxchan->{spotfilter}, @_, $self->{call} );
 828                         next unless $filter;
 829                 }
 830
 831                 if ($dxchan->is_ak1a) {
 832                         next if $dxchan == $self;
 833                         if ($hops) {
 834                                 $routeit = $line;
 835                                 $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
 836                         } else {
 837                                 $routeit = adjust_hops($dxchan, $line);  # adjust its hop count by node name
 838                                 next unless $routeit;
 839                         }
 840                         if ($filter) {
 841                                 $dxchan->send($routeit) if $routeit;
 842                         } else {
 843                                 $dxchan->send($routeit) unless $dxchan->{isolate} || $self->{isolate};
 844
 845                         }
 846                 } elsif ($dxchan->is_user && $dxchan->{dx}) {
 847                         my $buf = Spot::formatb($_[0], $_[1], $_[2], $_[3], $_[4]);
 848                         $buf .= "\a\a" if $dxchan->{beep};
 849                         if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
 850                                 $dxchan->send($buf) if !$hops || ($hops && $filter);
 851                         } else {
 852                                 $dxchan->delay($buf) if !$hops || ($hops && $filter);
 853                         }
 854                 }
 855         }
 856 }
 857
 858 sub send_wwv_spot
 859 {
 860         my $self = shift;
 861         my $line = shift;
 862         my @dxchan = DXChannel->get_all();
 863         my $dxchan;
 864
 865         # send it if it isn't the except list and isn't isolated and still has a hop count
 866         # taking into account filtering and so on
 867         foreach $dxchan (@dxchan) {
 868                 my $routeit;
 869                 my ($filter, $hops) = Filter::it($dxchan->{wwvfilter}, @_, $self->{call} ) if $dxchan->{wwvfilter};
 870                 if ($dxchan->is_ak1a) {
 871                         next if $dxchan == $self;
 872                         if ($hops) {
 873                                 $routeit = $line;
 874                                 $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
 875                         } else {
 876                                 $routeit = adjust_hops($dxchan, $line);  # adjust its hop count by node name
 877                                 next unless $routeit;
 878                         }
 879                         if ($filter) {
 880                                 $dxchan->send($routeit) if $routeit;
 881                         } else {
 882                                 $dxchan->send($routeit) unless $dxchan->{isolate} || $self->{isolate};
 883
 884                         }
 885                 } elsif ($dxchan->is_user && $dxchan->{wwv}) {
 886                         my $buf = "WWV de $_[6] <$_[1]>:   SFI=$_[2], A=$_[3], K=$_[4], $_[5]";
 887                         $buf .= "\a\a" if $dxchan->{beep};
 888                         if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
 889                                 $dxchan->send($buf) if !$hops || ($hops && $filter);
 890                         } else {
 891                                 $dxchan->delay($buf) if !$hops || ($hops && $filter);
 892                         }
 893                 }
 894         }
 895 }
 896
 897 sub send_local_config
 898 {
 899         my $self = shift;
 900         my $n;
 901         my @nodes;
 902         my @localnodes;
 903         my @remotenodes;
 904
 905         # send our nodes
 906         if ($self->{isolate}) {
 907                 @localnodes = (DXCluster->get_exact($main::mycall));
 908         } else {
 909                 # create a list of all the nodes that are not connected to this connection
 910                 # and are not themselves isolated, this to make sure that isolated nodes
 911         # don't appear outside of this node
 912                 @nodes = DXNode::get_all();
 913                 @nodes = grep { $_->{call} ne $main::mycall } @nodes;
 914                 @nodes = grep { $_->dxchan != $self } @nodes if @nodes;
 915                 @nodes = grep { !$_->dxchan->{isolate} } @nodes if @nodes;
 916                 @localnodes = grep { $_->dxchan->{call} eq $_->{call} } @nodes if @nodes;
 917                 unshift @localnodes, DXCluster->get_exact($main::mycall);
 918                 @remotenodes = grep { $_->dxchan->{call} ne $_->{call} } @nodes if @nodes;
 919         }
 920
 921         my @s = $me->pc19(@localnodes, @remotenodes);
 922         for (@s) {
 923                 my $routeit = adjust_hops($self, $_);
 924                 $self->send($routeit) if $routeit;
 925         }
 926
 927         # get all the users connected on the above nodes and send them out
 928         foreach $n (@localnodes, @remotenodes) {
 929                 my @users = values %{$n->list};
 930                 my @s = pc16($n, @users);
 931                 for (@s) {
 932                         my $routeit = adjust_hops($self, $_);
 933                         $self->send($routeit) if $routeit;
 934                 }
 935         }
 936 }
 937
 938 #
 939 # route a message down an appropriate interface for a callsign
 940 #
 941 # is called route(to, pcline);
 942 #
 943 sub route
 944 {
 945         my ($call, $line) = @_;
 946         my $cl = DXCluster->get_exact($call);
 947         if ($cl) {
 948                 my $hops;
 949                 my $dxchan = $cl->{dxchan};
 950                 if ($dxchan) {
 951                         my $routeit = adjust_hops($dxchan, $line);   # adjust its hop count by node name
 952                         if ($routeit) {
 953                                 $dxchan->send($routeit) if $dxchan;
 954                         }
 955                 }
 956         }
 957 }
 958
 959 # broadcast a message to all clusters taking into account isolation
 960 # [except those mentioned after buffer]
 961 sub broadcast_ak1a
 962 {
 963         my $s = shift;                          # the line to be rebroadcast
 964         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
 965         my @dxchan = get_all_ak1a();
 966         my $dxchan;
 967
 968         # send it if it isn't the except list and isn't isolated and still has a hop count
 969         foreach $dxchan (@dxchan) {
 970                 next if grep $dxchan == $_, @except;
 971                 my $routeit = adjust_hops($dxchan, $s);      # adjust its hop count by node name
 972                 $dxchan->send($routeit) unless $dxchan->{isolate} || !$routeit;
 973         }
 974 }
 975
 976 # broadcast a message to all clusters ignoring isolation
 977 # [except those mentioned after buffer]
 978 sub broadcast_all_ak1a
 979 {
 980         my $s = shift;                          # the line to be rebroadcast
 981         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
 982         my @dxchan = get_all_ak1a();
 983         my $dxchan;
 984
 985         # send it if it isn't the except list and isn't isolated and still has a hop count
 986         foreach $dxchan (@dxchan) {
 987                 next if grep $dxchan == $_, @except;
 988                 my $routeit = adjust_hops($dxchan, $s);      # adjust its hop count by node name
 989                 $dxchan->send($routeit);
 990         }
 991 }
 992
 993 # broadcast to all users
 994 # storing the spot or whatever until it is in a state to receive it
 995 sub broadcast_users
 996 {
 997         my $s = shift;                          # the line to be rebroadcast
 998         my $sort = shift;           # the type of transmission
 999         my $fref = shift;           # a reference to an object to filter on
1000         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
1001         my @dxchan = get_all_users();
1002         my $dxchan;
1003         my @out;
1004
1005         foreach $dxchan (@dxchan) {
1006                 next if grep $dxchan == $_, @except;
1007                 push @out, $dxchan;
1008         }
1009         broadcast_list($s, $sort, $fref, @out);
1010 }
1011
1012 # broadcast to a list of users
1013 sub broadcast_list
1014 {
1015         my $s = shift;
1016         my $sort = shift;
1017         my $fref = shift;
1018         my $dxchan;
1019
1020         foreach $dxchan (@_) {
1021                 my $filter = 1;
1022
1023                 if ($sort eq 'dx') {
1024                     next unless $dxchan->{dx};
1025                         ($filter) = Filter::it($dxchan->{spotfilter}, @{$fref}) if ref $fref;
1026                         next unless $filter;
1027                 }
1028                 next if $sort eq 'ann' && !$dxchan->{ann};
1029                 next if $sort eq 'wwv' && !$dxchan->{wwv};
1030                 next if $sort eq 'wx' && !$dxchan->{wx};
1031
1032                 $s =~ s/\a//og unless $dxchan->{beep};
1033
1034                 if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
1035                         $dxchan->send($s);
1036                 } else {
1037                         $dxchan->delay($s);
1038                 }
1039         }
1040 }
1041
1042 #
1043 # gimme all the ak1a nodes
1044 #
1045 sub get_all_ak1a
1046 {
1047         my @list = DXChannel->get_all();
1048         my $ref;
1049         my @out;
1050         foreach $ref (@list) {
1051                 push @out, $ref if $ref->is_ak1a;
1052         }
1053         return @out;
1054 }
1055
1056 # return a list of all users
1057 sub get_all_users
1058 {
1059         my @list = DXChannel->get_all();
1060         my $ref;
1061         my @out;
1062         foreach $ref (@list) {
1063                 push @out, $ref if $ref->is_user;
1064         }
1065         return @out;
1066 }
1067
1068 # return a list of all user callsigns
1069 sub get_all_user_calls
1070 {
1071         my @list = DXChannel->get_all();
1072         my $ref;
1073         my @out;
1074         foreach $ref (@list) {
1075                 push @out, $ref->call if $ref->is_user;
1076         }
1077         return @out;
1078 }
1079
1080 #
1081 # obtain the hops from the list for this callsign and pc no
1082 #
1083
1084 sub get_hops
1085 {
1086         my $pcno = shift;
1087         my $hops = $DXProt::hopcount{$pcno};
1088         $hops = $DXProt::def_hopcount if !$hops;
1089         return "H$hops";
1090 }
1091
1092 #
1093 # adjust the hop count on a per node basis using the user loadable
1094 # hop table if available or else decrement an existing one
1095 #
1096
1097 sub adjust_hops
1098 {
1099         my $self = shift;
1100         my $s = shift;
1101         my $call = $self->{call};
1102         my $hops;
1103
1104         if (($hops) = $s =~ /\^H(\d+)\^~?$/o) {
1105                 my ($pcno) = $s =~ /^PC(\d\d)/o;
1106                 confess "$call called adjust_hops with '$s'" unless $pcno;
1107                 my $ref = $nodehops{$call} if %nodehops;
1108                 if ($ref) {
1109                         my $newhops = $ref->{$pcno};
1110                         return "" if defined $newhops && $newhops == 0;
1111                         $newhops = $ref->{default} unless $newhops;
1112                         return "" if defined $newhops && $newhops == 0;
1113                         $newhops = $hops if !$newhops;
1114                         $s =~ s/\^H(\d+)(\^~?)$/\^H$newhops$2/ if $newhops;
1115                 } else {
1116                         # simply decrement it
1117                         $hops--;
1118                         return "" if !$hops;
1119                         $s =~ s/\^H(\d+)(\^~?)$/\^H$hops$2/ if $hops;
1120                 }
1121         }
1122         return $s;
1123 }
1124
1125 #
1126 # load hop tables
1127 #
1128 sub load_hops
1129 {
1130         my $self = shift;
1131         return $self->msg('lh1') unless -e "$main::data/hop_table.pl";
1132         do "$main::data/hop_table.pl";
1133         return $@ if $@;
1134         return 0;
1135 }
1136
1137 # remove leading and trailing spaces from an input string
1138 sub unpad
1139 {
1140         my $s = shift;
1141         $s =~ s/^\s+|\s+$//;
1142         return $s;
1143 }
1144
1145 # add a ping request to the ping queues
1146 sub addping
1147 {
1148         my ($from, $to) = @_;
1149         my $ref = $pings{$to};
1150         $ref = $pings{$to} = [] if !$ref;
1151         my $r = {};
1152         $r->{call} = $from;
1153         $r->{t} = $main::systime;
1154         route($to, pc51($to, $main::mycall, 1));
1155         push @$ref, $r;
1156 }
1157
1158 # add a rcmd request to the rcmd queues
1159 sub addrcmd
1160 {
1161         my ($from, $to, $cmd) = @_;
1162         my $r = {};
1163         $r->{call} = $from;
1164         $r->{t} = $main::systime;
1165         $r->{cmd} = $cmd;
1166         route($to, pc34($main::mycall, $to, $cmd));
1167         $rcmds{$to} = $r;
1168 }
1169 1;
1170 __END__