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