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 INPUT filters (these only pertain to Clusters)
 118         $self->{inspotfilter} = Filter::read_in('spots', $call, 1);
 119         $self->{inwwvfilter} = Filter::read_in('wwv', $call, 1);
 120         $self->{inannfilter} = Filter::read_in('ann', $call, 1);
 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                                 $self->route($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                                         $self->route($field[7], $line);
 195                                         return;
 196                                 }
 197                         }
 198
 199                         # if this is a 'nodx' node then ignore it
 200                         if (grep $field[7] =~ /^$_/,  @DXProt::nodx_node) {
 201                                 dbg('chan', "Bad DXNode, dropped");
 202                                 return;
 203                         }
 204
 205                         # convert the date to a unix date
 206                         my $d = cltounix($field[3], $field[4]);
 207                         # bang out (and don't pass on) if date is invalid or the spot is too old (or too young)
 208                         if (!$d || ($pcno == 11 && ($d < $main::systime - $pc11_max_age || $d > $main::systime + 900))) {
 209                                 dbg('chan', "Spot ignored, invalid date or out of range ($field[3] $field[4])\n");
 210                                 return;
 211                         }
 212
 213                         # strip off the leading & trailing spaces from the comment
 214                         my $text = unpad($field[5]);
 215
 216                         # store it away
 217                         my $spotter = $field[6];
 218                         $spotter =~ s/-[\@\d]+$//o;     # strip off the ssid from the spotter
 219
 220                         # do some de-duping
 221                         my $freq = $field[1] - 0;
 222                         my $dupkey = "$freq$field[2]$d$text$spotter";
 223                         if ($spotdup{$dupkey}) {
 224                                 dbg('chan', "Duplicate Spot ignored\n");
 225                                 return;
 226                         }
 227
 228                         $spotdup{$dupkey} = $d;
 229
 230                         # is it 'baddx'
 231                         if (grep $field[2] eq $_, @baddx) {
 232                                 dbg('chan', "Bad DX spot, ignored");
 233                                 return;
 234                         }
 235
 236                         # are any of the crucial fields invalid?
 237             if ($field[2] =~ /[a-z]/ || $field[6] =~ /[a-z]/ || $field[7] =~ /[a-z]/) {
 238                                 dbg('chan', "Spot contains lower case callsigns, rejected");
 239                                 return;
 240                         }
 241
 242                         my @spot = Spot::add($freq, $field[2], $d, $text, $spotter, $field[7]);
 243
 244             #
 245                         # @spot at this point contains:-
 246             # freq, spotted call, time, text, spotter, spotted cc, spotters cc, orig node
 247                         # then  spotted itu, spotted cq, spotters itu, spotters cq
 248                         # you should be able to route on any of these
 249             #
 250
 251                         # local processing
 252                         my $r;
 253                         eval {
 254                                 $r = Local::spot($self, @spot);
 255                         };
 256 #                       dbg('local', "Local::spot1 error $@") if $@;
 257                         return if $r;
 258
 259                         # DON'T be silly and send on PC26s!
 260                         return if $pcno == 26;
 261
 262                         # send out the filtered spots
 263                         send_dx_spot($self, $line, @spot) if @spot;
 264                         return;
 265                 }
 266
 267                 if ($pcno == 12) {              # announces
 268                         # announce duplicate checking
 269                         my $text = substr(uc unpad($field[3]), 0, $pc12_dup_lth);
 270                         my $dupkey = $field[1].$field[2].$text;
 271                         if ($anndup{$dupkey}) {
 272                                 dbg('chan', "Duplicate Announce ignored\n");
 273                                 return;
 274                         }
 275                         $anndup{$dupkey} = $main::systime;
 276
 277                         if ($field[2] eq '*' || $field[2] eq $main::mycall) {
 278
 279                                 # global ann filtering on INPUT
 280                                 if ($self->{inannfilter}) {
 281                                         my ($filter, $hops) = Filter::it($self->{inannfilter}, @field[1..6], $self->{call} );
 282                                         unless ($filter) {
 283                                                 dbg('chan', "Rejected by filter");
 284                                                 return;
 285                                         }
 286                                 }
 287
 288                                 # send it
 289                                 $self->send_announce($line, @field[1..6]);
 290
 291                                 if ($decode_dk0wcy && $field[1] eq $decode_dk0wcy) {
 292                                         my ($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+)/;
 293                                         $alarm = ($alarm =~ /^Y/i) ? ', Aurora in DE' : '';
 294                                         my $wwv = Geomag::update($main::systime, $hour, $sfi, $a, $k, "R=$r, Next K=$next$alarm", $decode_dk0wcy, $field[5], $r) if $sfi && $r;
 295                                 }
 296
 297                         } else {
 298                                 $self->route($field[2], $line);
 299                         }
 300
 301                         return;
 302                 }
 303
 304                 if ($pcno == 13) {
 305                         last SWITCH;
 306                 }
 307                 if ($pcno == 14) {
 308                         last SWITCH;
 309                 }
 310                 if ($pcno == 15) {
 311                         last SWITCH;
 312                 }
 313
 314                 if ($pcno == 16) {              # add a user
 315                         my $node = DXCluster->get_exact($field[1]);
 316                         my $dxchan;
 317                         if (!$node && ($dxchan = DXChannel->get($field[1]))) {
 318                                 # add it to the node table if it isn't present and it's
 319                                 # connected locally
 320                                 $node = DXNode->new($dxchan, $field[1], 0, 1, 5400);
 321                                 broadcast_ak1a(pc19($dxchan, $node), $dxchan, $self) unless $dxchan->{isolate};
 322
 323                         }
 324                         return unless $node; # ignore if havn't seen a PC19 for this one yet
 325                         return unless $node->isa('DXNode');
 326                         if ($node->dxchan != $self) {
 327                                 dbg('chan', "LOOP: $field[1] came in on wrong channel");
 328                                 return;
 329                         }
 330                         if (($dxchan = DXChannel->get($field[1])) && $dxchan != $self) {
 331                                 dbg('chan', "LOOP: $field[1] connected locally");
 332                                 return;
 333                         }
 334                         my $i;
 335
 336                         for ($i = 2; $i < $#field; $i++) {
 337                                 my ($call, $confmode, $here) = $field[$i] =~ /^(\S+) (\S) (\d)/o;
 338                                 next if !$call || length $call < 3 || length $call > 8;
 339                                 next if !$confmode;
 340                                 $call = uc $call;
 341                                 next if DXCluster->get_exact($call); # we already have this (loop?)
 342
 343                                 $confmode = $confmode eq '*';
 344                                 DXNodeuser->new($self, $node, $call, $confmode, $here);
 345
 346                                 # add this station to the user database, if required
 347                                 $call =~ s/-\d+$//o;        # remove ssid for users
 348                                 my $user = DXUser->get_current($call);
 349                                 $user = DXUser->new($call) if !$user;
 350                                 $user->homenode($node->call) if !$user->homenode;
 351                                 $user->node($node->call);
 352                                 $user->lastin($main::systime) unless DXChannel->get($call);
 353                                 $user->put;
 354                         }
 355
 356                         # queue up any messages (look for privates only)
 357                         DXMsg::queue_msg(1) if $self->state eq 'normal';
 358                         last SWITCH;
 359                 }
 360
 361                 if ($pcno == 17) {              # remove a user
 362                         my $node = DXCluster->get_exact($field[2]);
 363                         my $dxchan;
 364                         if (!$node && ($dxchan = DXChannel->get($field[2]))) {
 365                                 # add it to the node table if it isn't present and it's
 366                                 # connected locally
 367                                 $node = DXNode->new($dxchan, $field[2], 0, 1, 5400);
 368                                 broadcast_ak1a(pc19($dxchan, $node), $dxchan, $self) unless $dxchan->{isolate};
 369                                 return;
 370                         }
 371                         return unless $node;
 372                         return unless $node->isa('DXNode');
 373                         if ($node->dxchan != $self) {
 374                                 dbg('chan', "LOOP: $field[2] came in on wrong channel");
 375                                 return;
 376                         }
 377                         if (($dxchan = DXChannel->get($field[2])) && $dxchan != $self) {
 378                                 dbg('chan', "LOOP: $field[2] connected locally");
 379                                 return;
 380                         }
 381                         my $ref = DXCluster->get_exact($field[1]);
 382                         $ref->del() if $ref;
 383                         last SWITCH;
 384                 }
 385
 386                 if ($pcno == 18) {              # link request
 387                         $self->state('init');
 388
 389                         # first clear out any nodes on this dxchannel
 390                         my @gonenodes = map { $_->dxchan == $self ? $_ : () } DXNode::get_all();
 391                         foreach my $node (@gonenodes) {
 392                                 next if $node->dxchan == $DXProt::me;
 393                                 broadcast_ak1a(pc21($node->call, 'Gone, re-init') , $self) unless $self->{isolate};
 394                                 $node->del();
 395                         }
 396                         $self->send_local_config();
 397                         $self->send(pc20());
 398                         return;             # we don't pass these on
 399                 }
 400
 401                 if ($pcno == 19) {              # incoming cluster list
 402                         my $i;
 403                         my $newline = "PC19^";
 404                         for ($i = 1; $i < $#field-1; $i += 4) {
 405                                 my $here = $field[$i];
 406                                 my $call = uc $field[$i+1];
 407                                 my $confmode = $field[$i+2];
 408                                 my $ver = $field[$i+3];
 409
 410                                 $ver = 5400 if !$ver && $allowzero;
 411
 412                                 # now check the call over
 413                                 my $node = DXCluster->get_exact($call);
 414                                 if ($node) {
 415                                         my $dxchan;
 416                                         if (($dxchan = DXChannel->get($call)) && $dxchan != $self) {
 417                                                 dbg('chan', "LOOP: $call connected locally");
 418                                         }
 419                                     if ($node->dxchan != $self) {
 420                                                 dbg('chan', "LOOP: $call come in on wrong channel");
 421                                                 next;
 422                                         }
 423                                         dbg('chan', "already have $call");
 424                                         next;
 425                                 }
 426
 427                                 # check for sane parameters
 428                                 next if $ver < 5000; # only works with version 5 software
 429                                 next if length $call < 3; # min 3 letter callsigns
 430
 431                                 # add it to the nodes table and outgoing line
 432                                 $newline .= "$here^$call^$confmode^$ver^";
 433                                 DXNode->new($self, $call, $confmode, $here, $ver);
 434
 435                                 # unbusy and stop and outgoing mail (ie if somehow we receive another PC19 without a disconnect)
 436                                 my $mref = DXMsg::get_busy($call);
 437                                 $mref->stop_msg($call) if $mref;
 438
 439                                 # add this station to the user database, if required (don't remove SSID from nodes)
 440                                 my $user = DXUser->get_current($call);
 441                                 if (!$user) {
 442                                         $user = DXUser->new($call);
 443                                         $user->sort('A');
 444                                         $user->priv(1);                   # I have relented and defaulted nodes
 445                                         $self->{priv} = 1;                # to user RCMDs allowed
 446                                         $user->homenode($call);
 447                                         $user->node($call);
 448                                 }
 449                                 $user->lastin($main::systime) unless DXChannel->get($call);
 450                                 $user->put;
 451                         }
 452
 453                         return if $newline eq "PC19^";
 454
 455                         # add hop count
 456                         $newline .=  get_hops(19) . "^";
 457                         $line = $newline;
 458                         last SWITCH;
 459                 }
 460
 461                 if ($pcno == 20) {              # send local configuration
 462                         $self->send_local_config();
 463                         $self->send(pc22());
 464                         $self->state('normal');
 465                         return;
 466                 }
 467
 468                 if ($pcno == 21) {              # delete a cluster from the list
 469                         my $call = uc $field[1];
 470                         if ($call ne $main::mycall) { # don't allow malicious buggers to disconnect me!
 471                                 my $node = DXCluster->get_exact($call);
 472                                 if ($node) {
 473                                         if ($node->dxchan != $self) {
 474                                                 dbg('chan', "LOOP: $call come in on wrong channel");
 475                                                 return;
 476                                         }
 477                                         my $dxchan;
 478                                         if (($dxchan = DXChannel->get($call)) && $dxchan != $self) {
 479                                                 dbg('chan', "LOOP: $call connected locally");
 480                                                 return;
 481                                         }
 482                                         $node->del();
 483                                 } else {
 484                                         dbg('chan', "$call not in table, dropped");
 485                                         return;
 486                                 }
 487                         }
 488                         last SWITCH;
 489                 }
 490
 491                 if ($pcno == 22) {
 492                         $self->state('normal');
 493                         return;
 494                 }
 495
 496                 if ($pcno == 23 || $pcno == 27) { # WWV info
 497
 498                         # route 'foreign' pc27s
 499                         if ($pcno == 27) {
 500                                 if ($field[8] ne $main::mycall) {
 501                                         $self->route($field[8], $line);
 502                                         return;
 503                                 }
 504                         }
 505
 506                         # do some de-duping
 507                         my $d = cltounix($field[1], sprintf("%02d18Z", $field[2]));
 508                         my $sfi = unpad($field[3]);
 509                         my $k = unpad($field[4]);
 510                         my $i = unpad($field[5]);
 511                         my ($r) = $field[6] =~ /R=(\d+)/;
 512                         $r = 0 unless $r;
 513                         my $dupkey = "$d.$sfi$k$i";
 514                         if ($wwvdup{$dupkey}) {
 515                                 dbg('chan', "Dup WWV Spot ignored\n");
 516                                 return;
 517                         }
 518                         if (($pcno == 23 && $d < $main::systime - $pc23_max_age) || $d > $main::systime + 900 || $field[2] < 0 || $field[2] > 23) {
 519                                 dbg('chan', "WWV Date ($field[1] $field[2]) out of range");
 520                                 return;
 521                         }
 522                         $wwvdup{$dupkey} = $d;
 523                         $field[6] =~ s/-\d+$//o;            # remove spotter's ssid
 524
 525                         my $wwv = Geomag::update($d, $field[2], $sfi, $k, $i, @field[6..8], $r);
 526
 527                         my $rep;
 528                         eval {
 529                                 $rep = Local::wwv($self, $field[1], $field[2], $sfi, $k, $i, @field[6..8], $r);
 530                         };
 531 #                       dbg('local', "Local::wwv2 error $@") if $@;
 532                         return if $rep;
 533
 534                         # DON'T be silly and send on PC27s!
 535                         return if $pcno == 27;
 536
 537                         # broadcast to the eager world
 538                         send_wwv_spot($self, $line, $d, $field[2], $sfi, $k, $i, @field[6..8]);
 539                         return;
 540                 }
 541
 542                 if ($pcno == 24) {              # set here status
 543                         my $call = uc $field[1];
 544                         my $ref = DXCluster->get_exact($call);
 545                         $ref->here($field[2]) if $ref;
 546                         last SWITCH;
 547                 }
 548
 549                 if ($pcno == 25) {      # merge request
 550                         if ($field[1] ne $main::mycall) {
 551                                 $self->route($field[1], $line);
 552                                 return;
 553                         }
 554                         if ($field[2] eq $main::mycall) {
 555                                 dbg('chan', "Trying to merge to myself, ignored");
 556                                 return;
 557                         }
 558
 559                         Log('DXProt', "Merge request for $field[3] spots and $field[4] WWV from $field[1]");
 560
 561                         # spots
 562                         if ($field[3] > 0) {
 563                                 my @in = reverse Spot::search(1, undef, undef, 0, $field[3]);
 564                                 my $in;
 565                                 foreach $in (@in) {
 566                                         $self->send(pc26(@{$in}[0..4], $field[2]));
 567                                 }
 568                         }
 569
 570                         # wwv
 571                         if ($field[4] > 0) {
 572                                 my @in = reverse Geomag::search(0, $field[4], time, 1);
 573                                 my $in;
 574                                 foreach $in (@in) {
 575                                         $self->send(pc27(@{$in}[0..5], $field[2]));
 576                                 }
 577                         }
 578                         return;
 579                 }
 580
 581                 if (($pcno >= 28 && $pcno <= 33) || $pcno == 40 || $pcno == 42 || $pcno == 49) { # mail/file handling
 582                         if ($pcno == 49 || $field[1] eq $main::mycall) {
 583                                 DXMsg::process($self, $line);
 584                         } else {
 585                                 $self->route($field[1], $line);
 586                         }
 587                         return;
 588                 }
 589
 590                 if ($pcno == 34 || $pcno == 36) { # remote commands (incoming)
 591                         if ($field[1] eq $main::mycall) {
 592                                 my $ref = DXUser->get_current($field[2]);
 593                                 my $cref = DXCluster->get($field[2]);
 594                                 Log('rcmd', 'in', $ref->{priv}, $field[2], $field[3]);
 595                                 unless ($field[3] =~ /rcmd/i || !$cref || !$ref || $cref->mynode->call ne $ref->homenode) {    # not allowed to relay RCMDS!
 596                                         if ($ref->{priv}) {     # you have to have SOME privilege, the commands have further filtering
 597                                                 $self->{remotecmd} = 1; # for the benefit of any command that needs to know
 598                                                 my $oldpriv = $self->{priv};
 599                                                 $self->{priv} = $ref->{priv};     # assume the user's privilege level
 600                                                 my @in = (DXCommandmode::run_cmd($self, $field[3]));
 601                                                 $self->{priv} = $oldpriv;
 602                                                 for (@in) {
 603                                                         s/\s*$//og;
 604                                                         $self->send(pc35($main::mycall, $field[2], "$main::mycall:$_"));
 605                                                         Log('rcmd', 'out', $field[2], $_);
 606                                                 }
 607                                                 delete $self->{remotecmd};
 608                                         } else {
 609                                                 $self->send(pc35($main::mycall, $field[2], "$main::mycall:sorry...!"));
 610                                         }
 611                                 } else {
 612                                         $self->send(pc35($main::mycall, $field[2], "$main::mycall:your attempt is logged, Tut tut tut...!"));
 613                                 }
 614                         } else {
 615                                 $self->route($field[1], $line);
 616                         }
 617                         return;
 618                 }
 619
 620                 if ($pcno == 35) {              # remote command replies
 621                         if ($field[1] eq $main::mycall) {
 622                                 my $s = $rcmds{$field[2]};
 623                                 if ($s) {
 624                                         my $dxchan = DXChannel->get($s->{call});
 625                                         $dxchan->send($field[3]) if $dxchan;
 626                                         delete $rcmds{$field[2]} if !$dxchan;
 627                                 }
 628                         } else {
 629                                 $self->route($field[1], $line);
 630                         }
 631                         return;
 632                 }
 633
 634                 # for pc 37 see 44 onwards
 635
 636                 if ($pcno == 38) {              # node connected list from neighbour
 637                         return;
 638                 }
 639
 640                 if ($pcno == 39) {              # incoming disconnect
 641                         $self->disconnect();
 642                         return;
 643                 }
 644
 645                 if ($pcno == 41) {              # user info
 646                         # add this station to the user database, if required
 647                         my $user = DXUser->get_current($field[1]);
 648                         if (!$user) {
 649                                 # then try without an SSID
 650                                 $field[1] =~ s/-\d+$//o;
 651                                 $user = DXUser->get_current($field[1]);
 652                         }
 653                         $user = DXUser->new($field[1]) if !$user;
 654
 655                         if ($field[2] == 1) {
 656                                 $user->name($field[3]);
 657                         } elsif ($field[2] == 2) {
 658                                 $user->qth($field[3]);
 659                         } elsif ($field[2] == 3) {
 660                                 my ($lat, $long) = DXBearing::stoll($field[3]);
 661                                 $user->lat($lat);
 662                                 $user->long($long);
 663                         } elsif ($field[2] == 4) {
 664                                 $user->homenode($field[3]);
 665                         }
 666                         $user->put;
 667                         last SWITCH;
 668                 }
 669                 if ($pcno == 43) {
 670                         last SWITCH;
 671                 }
 672                 if ($pcno == 37 || $pcno == 44 || $pcno == 45 || $pcno == 46 || $pcno == 47) {
 673                         if ($field[1] eq $main::mycall) {
 674                                 ;
 675                         } else {
 676                                 $self->route($field[1], $line);
 677                         }
 678                         return;
 679                 }
 680
 681                 if ($pcno == 50) {              # keep alive/user list
 682                         my $node = DXCluster->get_exact($field[1]);
 683                         if ($node) {
 684                                 return unless $node->isa('DXNode');
 685                                 return unless $node->dxchan == $self;
 686                                 $node->update_users($field[2]);
 687                         }
 688                         last SWITCH;
 689                 }
 690
 691                 if ($pcno == 51) {              # incoming ping requests/answers
 692
 693                         # is it for us?
 694                         if ($field[1] eq $main::mycall) {
 695                                 my $flag = $field[3];
 696                                 if ($flag == 1) {
 697                                         $self->send(pc51($field[2], $field[1], '0'));
 698                                 } else {
 699                                         # it's a reply, look in the ping list for this one
 700                                         my $ref = $pings{$field[2]};
 701                                         if ($ref) {
 702                                                 my $r = shift @$ref;
 703                                                 my $dxchan = DXChannel->get($r->{call});
 704                                                 $dxchan->send($dxchan->msg('pingi', $field[2], atime($main::systime), $main::systime - $r->{t})) if $dxchan;
 705                                         }
 706                                 }
 707
 708                         } else {
 709                                 # route down an appropriate thingy
 710                                 $self->route($field[1], $line);
 711                         }
 712                         return;
 713                 }
 714         }
 715
 716          # if get here then rebroadcast the thing with its Hop count decremented (if
 717          # there is one). If it has a hop count and it decrements to zero then don't
 718          # rebroadcast it.
 719          #
 720          # NOTE - don't arrive here UNLESS YOU WANT this lump of protocol to be
 721          #        REBROADCAST!!!!
 722          #
 723
 724         if (!$self->{isolate}) {
 725                 broadcast_ak1a($line, $self); # send it to everyone but me
 726         }
 727 }
 728
 729 #
 730 # This is called from inside the main cluster processing loop and is used
 731 # for despatching commands that are doing some long processing job
 732 #
 733 sub process
 734 {
 735         my $t = time;
 736         my @dxchan = DXChannel->get_all();
 737         my $dxchan;
 738
 739         foreach $dxchan (@dxchan) {
 740                 next unless $dxchan->is_ak1a();
 741                 next if $dxchan == $me;
 742
 743                 # send a pc50 out on this channel
 744                 if ($t >= $dxchan->pc50_t + $DXProt::pc50_interval) {
 745                         $dxchan->send(pc50());
 746                         $dxchan->pc50_t($t);
 747                 }
 748         }
 749
 750         my $key;
 751         my $val;
 752         my $cutoff;
 753         if ($main::systime - 3600 > $last_hour) {
 754                 $cutoff  = $main::systime - $pc11_dup_age;
 755                 while (($key, $val) = each %spotdup) {
 756                         delete $spotdup{$key} if $val < $cutoff;
 757                 }
 758                 $cutoff = $main::systime - $pc23_dup_age;
 759                 while (($key, $val) = each %wwvdup) {
 760                         delete $wwvdup{$key} if $val < $cutoff;
 761                 }
 762                 $cutoff = $main::systime - $pc12_dup_age;
 763                 while (($key, $val) = each %anndup) {
 764                         delete $anndup{$key} if $val < $cutoff;
 765                 }
 766                 $last_hour = $main::systime;
 767         }
 768 }
 769
 770 #
 771 # finish up a pc context
 772 #
 773 sub finish
 774 {
 775         my $self = shift;
 776         my $call = $self->call;
 777         my $ref = DXCluster->get_exact($call);
 778
 779         # unbusy and stop and outgoing mail
 780         my $mref = DXMsg::get_busy($call);
 781         $mref->stop_msg($call) if $mref;
 782
 783         # broadcast to all other nodes that all the nodes connected to via me are gone
 784         my @gonenodes = map { $_->dxchan == $self ? $_ : () } DXNode::get_all();
 785         my $node;
 786
 787         foreach $node (@gonenodes) {
 788                 next if $node->call eq $call;
 789                 broadcast_ak1a(pc21($node->call, 'Gone') , $self) unless $self->{isolate};
 790                 $node->del();
 791         }
 792
 793         # remove outstanding pings
 794         delete $pings{$call};
 795
 796         # now broadcast to all other ak1a nodes that I have gone
 797         broadcast_ak1a(pc21($call, 'Gone.'), $self) unless $self->{isolate};
 798
 799         Log('DXProt', $call . " Disconnected");
 800         $ref->del() if $ref;
 801 }
 802
 803 #
 804 # some active measures
 805 #
 806 sub send_dx_spot
 807 {
 808         my $self = shift;
 809         my $line = shift;
 810         my @dxchan = DXChannel->get_all();
 811         my $dxchan;
 812
 813         # send it if it isn't the except list and isn't isolated and still has a hop count
 814         # taking into account filtering and so on
 815         foreach $dxchan (@dxchan) {
 816                 my $routeit;
 817                 my ($filter, $hops);
 818
 819                 if ($dxchan->{spotfilter}) {
 820                     ($filter, $hops) = Filter::it($dxchan->{spotfilter}, @_, $self->{call} );
 821                         next unless $filter;
 822                 }
 823
 824                 if ($dxchan->is_ak1a) {
 825                         next if $dxchan == $self;
 826                         if ($hops) {
 827                                 $routeit = $line;
 828                                 $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
 829                         } else {
 830                                 $routeit = adjust_hops($dxchan, $line);  # adjust its hop count by node name
 831                                 next unless $routeit;
 832                         }
 833                         if ($filter) {
 834                                 $dxchan->send($routeit) if $routeit;
 835                         } else {
 836                                 $dxchan->send($routeit) unless $dxchan->{isolate} || $self->{isolate};
 837                         }
 838                 } elsif ($dxchan->is_user && $dxchan->{dx}) {
 839                         my $buf = Spot::formatb($_[0], $_[1], $_[2], $_[3], $_[4]);
 840                         $buf .= "\a\a" if $dxchan->{beep};
 841                         if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
 842                                 $dxchan->send($buf);
 843                         } else {
 844                                 $dxchan->delay($buf);
 845                         }
 846                 }
 847         }
 848 }
 849
 850 sub send_wwv_spot
 851 {
 852         my $self = shift;
 853         my $line = shift;
 854         my @dxchan = DXChannel->get_all();
 855         my $dxchan;
 856
 857         # send it if it isn't the except list and isn't isolated and still has a hop count
 858         # taking into account filtering and so on
 859         foreach $dxchan (@dxchan) {
 860                 my $routeit;
 861                 my ($filter, $hops);
 862
 863                 if ($dxchan->{spotfilter}) {
 864                          ($filter, $hops) = Filter::it($dxchan->{wwvfilter}, @_, $self->{call} );
 865                          next unless $filter;
 866                 }
 867                 if ($dxchan->is_ak1a) {
 868                         next if $dxchan == $self;
 869                         if ($hops) {
 870                                 $routeit = $line;
 871                                 $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
 872                         } else {
 873                                 $routeit = adjust_hops($dxchan, $line);  # adjust its hop count by node name
 874                                 next unless $routeit;
 875                         }
 876                         if ($filter) {
 877                                 $dxchan->send($routeit) if $routeit;
 878                         } else {
 879                                 $dxchan->send($routeit) unless $dxchan->{isolate} || $self->{isolate};
 880
 881                         }
 882                 } elsif ($dxchan->is_user && $dxchan->{wwv}) {
 883                         my $buf = "WWV de $_[6] <$_[1]>:   SFI=$_[2], A=$_[3], K=$_[4], $_[5]";
 884                         $buf .= "\a\a" if $dxchan->{beep};
 885                         if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
 886                                 $dxchan->send($buf);
 887                         } else {
 888                                 $dxchan->delay($buf);
 889                         }
 890                 }
 891         }
 892 }
 893
 894 # send an announce
 895 sub send_announce
 896 {
 897         my $self = shift;
 898         my $line = shift;
 899         my @dxchan = DXChannel->get_all();
 900         my $dxchan;
 901         my $text = unpad($_[2]);
 902         my $target;
 903         my $to = 'To ';
 904
 905         if ($_[3] eq '*') {     # sysops
 906                 $target = "SYSOP";
 907         } elsif ($_[3] gt ' ') { # speciality list handling
 908                 my ($name) = split /\./, $_[3];
 909                 $target = "$name"; # put the rest in later (if bothered)
 910         }
 911
 912         if ($_[5] eq '1') {
 913                 $target = "WX";
 914                 $to = '';
 915         }
 916         $target = "All" if !$target;
 917
 918         Log('ann', $target, $_[0], $text);
 919
 920         # send it if it isn't the except list and isn't isolated and still has a hop count
 921         # taking into account filtering and so on
 922         foreach $dxchan (@dxchan) {
 923                 my $routeit;
 924                 my ($filter, $hops);
 925
 926                 if ($dxchan->{annfilter}) {
 927                         ($filter, $hops) = Filter::it($dxchan->{annfilter}, @_, $self->{call} );
 928                         next unless $filter;
 929                 }
 930                 if ($dxchan->is_ak1a && $_[1] ne $main::mycall) {  # i.e not specifically routed to me
 931                         next if $dxchan == $self;
 932                         if ($hops) {
 933                                 $routeit = $line;
 934                                 $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
 935                         } else {
 936                                 $routeit = adjust_hops($dxchan, $line);  # adjust its hop count by node name
 937                                 next unless $routeit;
 938                         }
 939                         if ($filter) {
 940                                 $dxchan->send($routeit) if $routeit;
 941                         } else {
 942                                 $dxchan->send($routeit) unless $dxchan->{isolate} || $self->{isolate};
 943
 944                         }
 945                 } elsif ($dxchan->is_user && $dxchan->{ann}) {
 946                         next if $target eq 'SYSOP' && $dxchan->{priv} < 5;
 947                         my $buf = "$to$target de $_[0]: $text";
 948                         $buf .= "\a\a" if $dxchan->{beep};
 949                         if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
 950                                 $dxchan->send($buf);
 951                         } else {
 952                                 $dxchan->delay($buf);
 953                         }
 954                 }
 955         }
 956 }
 957
 958 sub send_local_config
 959 {
 960         my $self = shift;
 961         my $n;
 962         my @nodes;
 963         my @localnodes;
 964         my @remotenodes;
 965
 966         # send our nodes
 967         if ($self->{isolate}) {
 968                 @localnodes = (DXCluster->get_exact($main::mycall));
 969         } else {
 970                 # create a list of all the nodes that are not connected to this connection
 971                 # and are not themselves isolated, this to make sure that isolated nodes
 972         # don't appear outside of this node
 973                 @nodes = DXNode::get_all();
 974                 @nodes = grep { $_->{call} ne $main::mycall } @nodes;
 975                 @nodes = grep { $_->dxchan != $self } @nodes if @nodes;
 976                 @nodes = grep { !$_->dxchan->{isolate} } @nodes if @nodes;
 977                 @localnodes = grep { $_->dxchan->{call} eq $_->{call} } @nodes if @nodes;
 978                 unshift @localnodes, DXCluster->get_exact($main::mycall);
 979                 @remotenodes = grep { $_->dxchan->{call} ne $_->{call} } @nodes if @nodes;
 980         }
 981
 982         my @s = $me->pc19(@localnodes, @remotenodes);
 983         for (@s) {
 984                 my $routeit = adjust_hops($self, $_);
 985                 $self->send($routeit) if $routeit;
 986         }
 987
 988         # get all the users connected on the above nodes and send them out
 989         foreach $n (@localnodes, @remotenodes) {
 990                 my @users = values %{$n->list};
 991                 my @s = pc16($n, @users);
 992                 for (@s) {
 993                         my $routeit = adjust_hops($self, $_);
 994                         $self->send($routeit) if $routeit;
 995                 }
 996         }
 997 }
 998
 999 #
1000 # route a message down an appropriate interface for a callsign
1001 #
1002 # is called route(to, pcline);
1003 #
1004 sub route
1005 {
1006         my ($self, $call, $line) = @_;
1007         my $cl = DXCluster->get_exact($call);
1008         if ($cl) {       # don't route it back down itself
1009                 if (ref $self && $call eq $self->{call}) {
1010                         dbg('chan', "Trying to route back to source, dropped");
1011                         return;
1012                 }
1013                 my $hops;
1014                 my $dxchan = $cl->{dxchan};
1015                 if ($dxchan) {
1016                         my $routeit = adjust_hops($dxchan, $line);   # adjust its hop count by node name
1017                         if ($routeit) {
1018                                 $dxchan->send($routeit) if $dxchan;
1019                         }
1020                 }
1021         }
1022 }
1023
1024 # broadcast a message to all clusters taking into account isolation
1025 # [except those mentioned after buffer]
1026 sub broadcast_ak1a
1027 {
1028         my $s = shift;                          # the line to be rebroadcast
1029         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
1030         my @dxchan = get_all_ak1a();
1031         my $dxchan;
1032
1033         # send it if it isn't the except list and isn't isolated and still has a hop count
1034         foreach $dxchan (@dxchan) {
1035                 next if grep $dxchan == $_, @except;
1036                 my $routeit = adjust_hops($dxchan, $s);      # adjust its hop count by node name
1037                 $dxchan->send($routeit) unless $dxchan->{isolate} || !$routeit;
1038         }
1039 }
1040
1041 # broadcast a message to all clusters ignoring isolation
1042 # [except those mentioned after buffer]
1043 sub broadcast_all_ak1a
1044 {
1045         my $s = shift;                          # the line to be rebroadcast
1046         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
1047         my @dxchan = get_all_ak1a();
1048         my $dxchan;
1049
1050         # send it if it isn't the except list and isn't isolated and still has a hop count
1051         foreach $dxchan (@dxchan) {
1052                 next if grep $dxchan == $_, @except;
1053                 my $routeit = adjust_hops($dxchan, $s);      # adjust its hop count by node name
1054                 $dxchan->send($routeit);
1055         }
1056 }
1057
1058 # broadcast to all users
1059 # storing the spot or whatever until it is in a state to receive it
1060 sub broadcast_users
1061 {
1062         my $s = shift;                          # the line to be rebroadcast
1063         my $sort = shift;           # the type of transmission
1064         my $fref = shift;           # a reference to an object to filter on
1065         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
1066         my @dxchan = get_all_users();
1067         my $dxchan;
1068         my @out;
1069
1070         foreach $dxchan (@dxchan) {
1071                 next if grep $dxchan == $_, @except;
1072                 push @out, $dxchan;
1073         }
1074         broadcast_list($s, $sort, $fref, @out);
1075 }
1076
1077 # broadcast to a list of users
1078 sub broadcast_list
1079 {
1080         my $s = shift;
1081         my $sort = shift;
1082         my $fref = shift;
1083         my $dxchan;
1084
1085         foreach $dxchan (@_) {
1086                 my $filter = 1;
1087
1088                 if ($sort eq 'dx') {
1089                     next unless $dxchan->{dx};
1090                         ($filter) = Filter::it($dxchan->{spotfilter}, @{$fref}) if ref $fref;
1091                         next unless $filter;
1092                 }
1093                 next if $sort eq 'ann' && !$dxchan->{ann};
1094                 next if $sort eq 'wwv' && !$dxchan->{wwv};
1095                 next if $sort eq 'wx' && !$dxchan->{wx};
1096
1097                 $s =~ s/\a//og unless $dxchan->{beep};
1098
1099                 if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
1100                         $dxchan->send($s);
1101                 } else {
1102                         $dxchan->delay($s);
1103                 }
1104         }
1105 }
1106
1107 #
1108 # gimme all the ak1a nodes
1109 #
1110 sub get_all_ak1a
1111 {
1112         my @list = DXChannel->get_all();
1113         my $ref;
1114         my @out;
1115         foreach $ref (@list) {
1116                 push @out, $ref if $ref->is_ak1a;
1117         }
1118         return @out;
1119 }
1120
1121 # return a list of all users
1122 sub get_all_users
1123 {
1124         my @list = DXChannel->get_all();
1125         my $ref;
1126         my @out;
1127         foreach $ref (@list) {
1128                 push @out, $ref if $ref->is_user;
1129         }
1130         return @out;
1131 }
1132
1133 # return a list of all user callsigns
1134 sub get_all_user_calls
1135 {
1136         my @list = DXChannel->get_all();
1137         my $ref;
1138         my @out;
1139         foreach $ref (@list) {
1140                 push @out, $ref->call if $ref->is_user;
1141         }
1142         return @out;
1143 }
1144
1145 #
1146 # obtain the hops from the list for this callsign and pc no
1147 #
1148
1149 sub get_hops
1150 {
1151         my $pcno = shift;
1152         my $hops = $DXProt::hopcount{$pcno};
1153         $hops = $DXProt::def_hopcount if !$hops;
1154         return "H$hops";
1155 }
1156
1157 #
1158 # adjust the hop count on a per node basis using the user loadable
1159 # hop table if available or else decrement an existing one
1160 #
1161
1162 sub adjust_hops
1163 {
1164         my $self = shift;
1165         my $s = shift;
1166         my $call = $self->{call};
1167         my $hops;
1168
1169         if (($hops) = $s =~ /\^H(\d+)\^~?$/o) {
1170                 my ($pcno) = $s =~ /^PC(\d\d)/o;
1171                 confess "$call called adjust_hops with '$s'" unless $pcno;
1172                 my $ref = $nodehops{$call} if %nodehops;
1173                 if ($ref) {
1174                         my $newhops = $ref->{$pcno};
1175                         return "" if defined $newhops && $newhops == 0;
1176                         $newhops = $ref->{default} unless $newhops;
1177                         return "" if defined $newhops && $newhops == 0;
1178                         $newhops = $hops if !$newhops;
1179                         $s =~ s/\^H(\d+)(\^~?)$/\^H$newhops$2/ if $newhops;
1180                 } else {
1181                         # simply decrement it
1182                         $hops--;
1183                         return "" if !$hops;
1184                         $s =~ s/\^H(\d+)(\^~?)$/\^H$hops$2/ if $hops;
1185                 }
1186         }
1187         return $s;
1188 }
1189
1190 #
1191 # load hop tables
1192 #
1193 sub load_hops
1194 {
1195         my $self = shift;
1196         return $self->msg('lh1') unless -e "$main::data/hop_table.pl";
1197         do "$main::data/hop_table.pl";
1198         return $@ if $@;
1199         return 0;
1200 }
1201
1202 # remove leading and trailing spaces from an input string
1203 sub unpad
1204 {
1205         my $s = shift;
1206         $s =~ s/^\s+|\s+$//;
1207         return $s;
1208 }
1209
1210 # add a ping request to the ping queues
1211 sub addping
1212 {
1213         my ($from, $to) = @_;
1214         my $ref = $pings{$to};
1215         $ref = $pings{$to} = [] if !$ref;
1216         my $r = {};
1217         $r->{call} = $from;
1218         $r->{t} = $main::systime;
1219         route(undef, $to, pc51($to, $main::mycall, 1));
1220         push @$ref, $r;
1221 }
1222
1223 # add a rcmd request to the rcmd queues
1224 sub addrcmd
1225 {
1226         my ($from, $to, $cmd) = @_;
1227         my $r = {};
1228         $r->{call} = $from;
1229         $r->{t} = $main::systime;
1230         $r->{cmd} = $cmd;
1231         route(undef, $to, pc34($main::mycall, $to, $cmd));
1232         $rcmds{$to} = $r;
1233 }
1234 1;
1235 __END__