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 Carp;
  25
  26 use strict;
  27 use vars qw($me $pc11_max_age $pc11_dup_age %dup $last_hour);
  28
  29 $me = undef;                                    # the channel id for this cluster
  30 $pc11_max_age = 1*3600;                 # the maximum age for an incoming 'real-time' pc11
  31 $pc11_dup_age = 24*3600;                # the maximum time to keep the dup list for
  32 %dup = ();                                              # the pc11 and 26 dup hash
  33 $last_hour = time;                              # last time I did an hourly periodic update
  34
  35 sub init
  36 {
  37         my $user = DXUser->get($main::mycall);
  38         $me = DXProt->new($main::mycall, undef, $user);
  39         #  $me->{sort} = 'M';    # M for me
  40 }
  41
  42 #
  43 # obtain a new connection this is derived from dxchannel
  44 #
  45
  46 sub new
  47 {
  48         my $self = DXChannel::alloc(@_);
  49         $self->{sort} = 'A';            # in absence of how to find out what sort of an object I am
  50         return $self;
  51 }
  52
  53 # this is how a pc connection starts (for an incoming connection)
  54 # issue a PC38 followed by a PC18, then wait for a PC20 (remembering
  55 # all the crap that comes between).
  56 sub start
  57 {
  58         my ($self, $line, $sort) = @_;
  59         my $call = $self->{call};
  60         my $user = $self->{user};
  61
  62         # remember type of connection
  63         $self->{consort} = $line;
  64         $self->{outbound} = $sort eq 'O';
  65         $self->{priv} = $user->priv;
  66         $self->{lang} = $user->lang;
  67         $self->{consort} = $line;       # save the connection type
  68         $self->{here} = 1;
  69
  70         # set unbuffered
  71         $self->send_now('B',"0");
  72
  73         # send initialisation string
  74         if (!$self->{outbound}) {
  75                 $self->send(pc38()) if DXNode->get_all();
  76                 $self->send(pc18());
  77         }
  78         $self->state('init');
  79         $self->pc50_t(time);
  80         Log('DXProt', "$call connected");
  81 }
  82
  83 #
  84 # This is the normal pcxx despatcher
  85 #
  86 sub normal
  87 {
  88         my ($self, $line) = @_;
  89         my @field = split /[\^\~]/, $line;
  90
  91         # ignore any lines that don't start with PC
  92         return if !$field[0] =~ /^PC/;
  93
  94         # process PC frames
  95         my ($pcno) = $field[0] =~ /^PC(\d\d)/; # just get the number
  96         return if $pcno < 10 || $pcno > 51;
  97
  98  SWITCH: {
  99                 if ($pcno == 10) {              # incoming talk
 100
 101                         # is it for me or one of mine?
 102                         my $call = ($field[5] gt ' ') ? $field[5] : $field[2];
 103                         if ($call eq $main::mycall || grep $_ eq $call, get_all_user_calls()) {
 104
 105                                 # yes, it is
 106                                 my $text = unpad($field[3]);
 107                                 Log('talk', $call, $field[1], $field[6], $text);
 108                                 $call = $main::myalias if $call eq $main::mycall;
 109                                 my $ref = DXChannel->get($call);
 110                                 $ref->send("$call de $field[1]: $text") if $ref;
 111                         } else {
 112                                 route($field[2], $line); # relay it on its way
 113                         }
 114                         return;
 115                 }
 116
 117                 if ($pcno == 11 || $pcno == 26) { # dx spot
 118
 119                         # if this is a 'nodx' node then ignore it
 120                         last SWITCH if grep $field[7] =~ /^$_/,  @DXProt::nodx_node;
 121
 122                         # convert the date to a unix date
 123                         my $d = cltounix($field[3], $field[4]);
 124                         return if !$d || ($pcno == 11 && $d < $main::systime - $pc11_max_age); # bang out (and don't pass on) if date is invalid or the spot is too old
 125
 126                         # strip off the leading & trailing spaces from the comment
 127                         my $text = unpad($field[5]);
 128
 129                         # store it away
 130                         my $spotter = $field[6];
 131                         $spotter =~ s/-\d+$//o; # strip off the ssid from the spotter
 132
 133                         # do some de-duping
 134                         my $dupkey = "$field[1]$field[2]$d$text$field[6]";
 135                         return if $dup{$dupkey};
 136                         $dup{$dupkey} = $d;
 137
 138                         my $spot = Spot::add($field[1], $field[2], $d, $text, $spotter);
 139
 140                         # send orf to the users
 141                         if ($spot && $pcno == 11) {
 142                                 my $buf = Spot::formatb($field[1], $field[2], $d, $text, $spotter);
 143                                 broadcast_users("$buf\a\a");
 144                         }
 145
 146                         last SWITCH;
 147                 }
 148
 149                 if ($pcno == 12) {              # announces
 150
 151                         if ($field[2] eq '*' || $field[2] eq $main::mycall) {
 152
 153                                 # strip leading and trailing stuff
 154                                 my $text = unpad($field[3]);
 155                                 my $target;
 156                                 my $to = 'To ';
 157                                 my @list;
 158
 159                                 if ($field[4] eq '*') { # sysops
 160                                         $target = "Sysops";
 161                                         @list = map { $_->priv >= 5 ? $_ : () } get_all_users();
 162                                 } elsif ($field[4] gt ' ') { # speciality list handling
 163                                         my ($name) = split /\./, $field[4];
 164                                         $target = "$name"; # put the rest in later (if bothered)
 165                                 }
 166
 167                                 if ($field[6] eq '1') {
 168                                         $target = "WX";
 169                                         $to = '';
 170                                 }
 171                                 $target = "All" if !$target;
 172
 173                                 if (@list > 0) {
 174                                         broadcast_list("$to$target de $field[1]: $text", @list);
 175                                 } else {
 176                                         broadcast_users("$target de $field[1]: $text");
 177                                 }
 178                                 Log('ann', $target, $field[1], $text);
 179
 180                                 return if $field[2] eq $main::mycall; # it's routed to me
 181                         } else {
 182                                 route($field[2], $line);
 183                                 return;                 # only on a routed one
 184                         }
 185
 186                         last SWITCH;
 187                 }
 188
 189                 if ($pcno == 13) {
 190                         last SWITCH;
 191                 }
 192                 if ($pcno == 14) {
 193                         last SWITCH;
 194                 }
 195                 if ($pcno == 15) {
 196                         last SWITCH;
 197                 }
 198
 199                 if ($pcno == 16) {              # add a user
 200                         my $node = DXCluster->get_exact($field[1]);
 201                         last SWITCH if !$node; # ignore if havn't seen a PC19 for this one yet
 202                         my $i;
 203
 204                         for ($i = 2; $i < $#field; $i++) {
 205                                 my ($call, $confmode, $here) = $field[$i] =~ /^(\S+) (-) (\d)/o;
 206                                 next if length $call < 3;
 207                                 next if !$confmode;
 208                                 $call = uc $call;
 209                                 next if DXCluster->get_exact($call); # we already have this (loop?)
 210
 211                                 $confmode = $confmode eq '*';
 212                                 DXNodeuser->new($self, $node, $call, $confmode, $here);
 213
 214                                 # add this station to the user database, if required
 215                                 $call =~ s/-\d+$//o;        # remove ssid for users
 216                                 my $user = DXUser->get_current($call);
 217                                 $user = DXUser->new($call) if !$user;
 218                                 $user->node($node->call);
 219                                 $user->homenode($node->call) if !$user->homenode;
 220                                 $user->put;
 221                         }
 222
 223                         # queue up any messages (look for privates only)
 224                         DXMsg::queue_msg(1) if $self->state eq 'normal';
 225                         last SWITCH;
 226                 }
 227
 228                 if ($pcno == 17) {              # remove a user
 229
 230                         my $ref = DXCluster->get_exact($field[1]);
 231                         $ref->del() if $ref;
 232                         last SWITCH;
 233                 }
 234
 235                 if ($pcno == 18) {              # link request
 236                         $self->send_local_config();
 237                         $self->send(pc20());
 238                         $self->state('init');
 239                         last SWITCH;
 240                 }
 241
 242                 if ($pcno == 19) {              # incoming cluster list
 243                         my $i;
 244                         for ($i = 1; $i < $#field-1; $i += 4) {
 245                                 my $here = $field[$i];
 246                                 my $call = uc $field[$i+1];
 247                                 my $confmode = $field[$i+2] eq '*';
 248                                 my $ver = $field[$i+3];
 249
 250                                 # now check the call over
 251                                 next if DXCluster->get_exact($call); # we already have this
 252
 253                                 # check for sane parameters
 254                                 next if $ver < 5000; # only works with version 5 software
 255                                 next if length $call < 3; # min 3 letter callsigns
 256                                 DXNode->new($self, $call, $confmode, $here, $ver);
 257
 258                                 # unbusy and stop and outgoing mail (ie if somehow we receive another PC19 without a disconnect)
 259                                 my $mref = DXMsg::get_busy($call);
 260                                 $mref->stop_msg($self) if $mref;
 261
 262                                 # add this station to the user database, if required (don't remove SSID from nodes)
 263                                 my $user = DXUser->get_current($call);
 264                                 if (!$user) {
 265                                         $user = DXUser->new($call);
 266                                         $user->sort('A');
 267                                         $user->node($call);
 268                                         $user->homenode($call);
 269                                         $user->put;
 270                                 }
 271                         }
 272
 273                         # queue up any messages
 274                         DXMsg::queue_msg() if $self->state eq 'normal';
 275                         last SWITCH;
 276                 }
 277
 278                 if ($pcno == 20) {              # send local configuration
 279                         $self->send_local_config();
 280                         $self->send(pc22());
 281                         $self->state('normal');
 282
 283                         # queue mail
 284                         DXMsg::queue_msg();
 285                         return;
 286                 }
 287
 288                 if ($pcno == 21) {              # delete a cluster from the list
 289                         my $call = uc $field[1];
 290                         if ($call ne $main::mycall) { # don't allow malicious buggers to disconnect me!
 291                                 my $ref = DXCluster->get_exact($call);
 292                                 $ref->del() if $ref;
 293                         }
 294                         last SWITCH;
 295                 }
 296
 297                 if ($pcno == 22) {
 298                         last SWITCH;
 299                 }
 300
 301                 if ($pcno == 23 || $pcno == 27) { # WWV info
 302                         Geomag::update(@field[1..$#field]);
 303                         last SWITCH;
 304                 }
 305
 306                 if ($pcno == 24) {              # set here status
 307                         my $call = uc $field[1];
 308                         my $ref = DXCluster->get_exact($call);
 309                         $ref->here($field[2]) if $ref;
 310                         last SWITCH;
 311                 }
 312
 313                 if ($pcno == 25) {
 314                         last SWITCH;
 315                 }
 316
 317                 if (($pcno >= 28 && $pcno <= 33) || $pcno == 40 || $pcno == 42) { # mail/file handling
 318                         DXMsg::process($self, $line);
 319                         return;
 320                 }
 321
 322                 if ($pcno == 34 || $pcno == 36) { # remote commands (incoming)
 323                         if ($field[1] eq $main::mycall) {
 324                                 my $ref = DXUser->get_current($field[2]);
 325                                 Log('rcmd', 'in', $ref->{priv}, $field[2], $field[3]);
 326                                 if ($ref->{priv}) {     # you have to have SOME privilege, the commands have further filtering
 327                                         $self->{remotecmd} = 1; # for the benefit of any command that needs to know
 328                                         my @in = (DXCommandmode::run_cmd($self, $field[3]));
 329                                         for (@in) {
 330                                                 s/\s*$//og;
 331                                                 $self->send(pc35($main::mycall, $field[2], "$main::mycall:$_"));
 332                                                 Log('rcmd', 'out', $field[2], $_);
 333                                         }
 334                                         delete $self->{remotecmd};
 335                                 }
 336                         } else {
 337                                 route($field[1], $line);
 338                         }
 339                         return;
 340                 }
 341
 342                 if ($pcno == 35) {              # remote command replies
 343                         if ($field[1] eq $main::mycall) {
 344                                 my $s = DXChannel::get($main::myalias);
 345                                 my @ref = grep { $_->pc34to eq $field[2] } DXChannel::get_all(); # people that have rcmded someone
 346                                 push @ref, $s if $s;
 347
 348                                 foreach (@ref) {
 349                                         $_->send($field[3]);
 350                                 }
 351                         } else {
 352                                 route($field[1], $line);
 353                         }
 354                         return;
 355                 }
 356
 357                 if ($pcno == 37) {
 358                         last SWITCH;
 359                 }
 360
 361                 if ($pcno == 38) {              # node connected list from neighbour
 362                         return;
 363                 }
 364
 365                 if ($pcno == 39) {              # incoming disconnect
 366                         $self->disconnect();
 367                         return;
 368                 }
 369
 370                 if ($pcno == 41) {              # user info
 371                         # add this station to the user database, if required
 372                         my $user = DXUser->get_current($field[1]);
 373                         if (!$user) {
 374                                 # then try without an SSID
 375                                 $field[1] =~ s/-\d+$//o;
 376                                 $user = DXUser->get_current($field[1]);
 377                         }
 378                         $user = DXUser->new($field[1]) if !$user;
 379
 380                         if ($field[2] == 1) {
 381                                 $user->name($field[3]);
 382                         } elsif ($field[2] == 2) {
 383                                 $user->qth($field[3]);
 384                         } elsif ($field[2] == 3) {
 385                                 my ($latd, $latm, $latl, $longd, $longm, $longl) = split /\s+/, $field[3];
 386                                 $longd += ($longm/60);
 387                                 $longd = 0-$longd if (uc $longl) eq 'W';
 388                                 $user->long($longd);
 389                                 $latd += ($latm/60);
 390                                 $latd = 0-$latd if (uc $latl) eq 'S';
 391                                 $user->lat($latd);
 392                         } elsif ($field[2] == 4) {
 393                                 $user->homenode($field[3]);
 394                         }
 395                         $user->put;
 396                         last SWITCH;
 397                 }
 398                 if ($pcno == 43) {
 399                         last SWITCH;
 400                 }
 401                 if ($pcno == 44) {
 402                         last SWITCH;
 403                 }
 404                 if ($pcno == 45) {
 405                         last SWITCH;
 406                 }
 407                 if ($pcno == 46) {
 408                         last SWITCH;
 409                 }
 410                 if ($pcno == 47) {
 411                         last SWITCH;
 412                 }
 413                 if ($pcno == 48) {
 414                         last SWITCH;
 415                 }
 416                 if ($pcno == 49) {
 417                         last SWITCH;
 418                 }
 419
 420                 if ($pcno == 50) {              # keep alive/user list
 421                         my $ref = DXCluster->get_exact($field[1]);
 422                         $ref->update_users($field[2]) if $ref;
 423                         last SWITCH;
 424                 }
 425
 426                 if ($pcno == 51) {              # incoming ping requests/answers
 427
 428                         # is it for us?
 429                         if ($field[1] eq $main::mycall) {
 430                                 my $flag = $field[3];
 431                                 $flag ^= 1;
 432                                 $self->send($self->pc51($field[2], $field[1], $flag));
 433                         } else {
 434                                 # route down an appropriate thingy
 435                                 route($field[1], $line);
 436                         }
 437                         return;
 438                 }
 439         }
 440
 441          # if get here then rebroadcast the thing with its Hop count decremented (if
 442          # there is one). If it has a hop count and it decrements to zero then don't
 443          # rebroadcast it.
 444          #
 445          # NOTE - don't arrive here UNLESS YOU WANT this lump of protocol to be
 446          #        REBROADCAST!!!!
 447          #
 448
 449          my $hops;
 450         if (($hops) = $line =~ /H(\d+)\^\~?$/o) {
 451                 my $newhops = $hops - 1;
 452                 if ($newhops > 0) {
 453                         $line =~ s/\^H$hops(\^\~?)$/\^H$newhops$1/;     # change the hop count
 454                         broadcast_ak1a($line, $self); # send it to everyone but me
 455                 }
 456         }
 457 }
 458
 459 #
 460 # This is called from inside the main cluster processing loop and is used
 461 # for despatching commands that are doing some long processing job
 462 #
 463 sub process
 464 {
 465         my $t = time;
 466         my @chan = DXChannel->get_all();
 467         my $chan;
 468
 469         foreach $chan (@chan) {
 470                 next if !$chan->is_ak1a();
 471
 472                 # send a pc50 out on this channel
 473                 if ($t >= $chan->pc50_t + $DXProt::pc50_interval) {
 474                         $chan->send(pc50());
 475                         $chan->pc50_t($t);
 476                 }
 477         }
 478
 479         my $key;
 480         my $val;
 481         my $cutoff;
 482         if ($main::systime - 3600 > $last_hour) {
 483                 $cutoff  = $main::systime - $pc11_dup_age;
 484                 while (($key, $val) = each %dup) {
 485                         delete $dup{$key} if $val < $cutoff;
 486                 }
 487                 $last_hour = $main::systime;
 488         }
 489 }
 490
 491 #
 492 # finish up a pc context
 493 #
 494 sub finish
 495 {
 496         my $self = shift;
 497         my $ref = DXCluster->get_exact($self->call);
 498
 499         # unbusy and stop and outgoing mail
 500         my $mref = DXMsg::get_busy($self->call);
 501         $mref->stop_msg($self) if $mref;
 502
 503         # broadcast to all other nodes that all the nodes connected to via me are gone
 504         my @gonenodes = map { $_->dxchan == $self ? $_ : () } DXNode::get_all();
 505         my $node;
 506
 507         foreach $node (@gonenodes) {
 508                 next if $node->call eq $self->call;
 509                 broadcast_ak1a(pc21($node->call, 'Gone'), $self); # done like this 'cos DXNodes don't have a pc21 method
 510                 $node->del();
 511         }
 512
 513         # now broadcast to all other ak1a nodes that I have gone
 514         broadcast_ak1a(pc21($self->call, 'Gone.'), $self);
 515         Log('DXProt', $self->call . " Disconnected");
 516         $ref->del() if $ref;
 517 }
 518
 519 #
 520 # some active measures
 521 #
 522
 523 sub send_local_config
 524 {
 525         my $self = shift;
 526         my $n;
 527
 528         # send our nodes
 529         my @nodes = DXNode::get_all();
 530
 531         # create a list of all the nodes that are not connected to this connection
 532         @nodes = grep { $_->dxchan != $self } @nodes;
 533         $self->send($me->pc19(@nodes));
 534
 535         # get all the users connected on the above nodes and send them out
 536         foreach $n (@nodes) {
 537                 my @users = values %{$n->list};
 538                 $self->send(DXProt::pc16($n, @users));
 539         }
 540 }
 541
 542 #
 543 # route a message down an appropriate interface for a callsign
 544 #
 545 # is called route(to, pcline);
 546 #
 547 sub route
 548 {
 549         my ($call, $line) = @_;
 550         my $cl = DXCluster->get_exact($call);
 551         if ($cl) {
 552                 my $hops;
 553                 my $dxchan = $cl->{dxchan};
 554                 if (($hops) = $line =~ /H(\d+)\^\~?$/o) {
 555                         my $newhops = $hops - 1;
 556                         if ($newhops > 0) {
 557                                 $line =~ s/\^H$hops(\^\~?)$/\^H$newhops$1/;     # change the hop count
 558                                 $dxchan->send($line) if $dxchan;
 559                         }
 560                 } else {
 561                         $dxchan->send($line) if $dxchan; # for them wot don't have Hops
 562                 }
 563         }
 564 }
 565
 566 # broadcast a message to all clusters [except those mentioned after buffer]
 567 sub broadcast_ak1a
 568 {
 569         my $s = shift;                          # the line to be rebroadcast
 570         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
 571         my @chan = get_all_ak1a();
 572         my $chan;
 573
 574         foreach $chan (@chan) {
 575                 next if grep $chan == $_, @except;
 576                 $chan->send($s);                # send it if it isn't the except list
 577         }
 578 }
 579
 580 # broadcast to all users
 581 sub broadcast_users
 582 {
 583         my $s = shift;                          # the line to be rebroadcast
 584         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
 585         my @chan = get_all_users();
 586         my $chan;
 587
 588         foreach $chan (@chan) {
 589                 next if grep $chan == $_, @except;
 590                 $chan->send($s);                # send it if it isn't the except list
 591         }
 592 }
 593
 594 # broadcast to a list of users
 595 sub broadcast_list
 596 {
 597         my $s = shift;
 598         my $chan;
 599
 600         foreach $chan (@_) {
 601                 $chan->send($s);                # send it
 602         }
 603 }
 604
 605 #
 606 # gimme all the ak1a nodes
 607 #
 608 sub get_all_ak1a
 609 {
 610         my @list = DXChannel->get_all();
 611         my $ref;
 612         my @out;
 613         foreach $ref (@list) {
 614                 push @out, $ref if $ref->is_ak1a;
 615         }
 616         return @out;
 617 }
 618
 619 # return a list of all users
 620 sub get_all_users
 621 {
 622         my @list = DXChannel->get_all();
 623         my $ref;
 624         my @out;
 625         foreach $ref (@list) {
 626                 push @out, $ref if $ref->is_user;
 627         }
 628         return @out;
 629 }
 630
 631 # return a list of all user callsigns
 632 sub get_all_user_calls
 633 {
 634         my @list = DXChannel->get_all();
 635         my $ref;
 636         my @out;
 637         foreach $ref (@list) {
 638                 push @out, $ref->call if $ref->is_user;
 639         }
 640         return @out;
 641 }
 642
 643 #
 644 # obtain the hops from the list for this callsign and pc no
 645 #
 646
 647 sub get_hops
 648 {
 649         my ($pcno) = @_;
 650         my $hops = $DXProt::hopcount{$pcno};
 651         $hops = $DXProt::def_hopcount if !$hops;
 652         return "H$hops";
 653 }
 654
 655 # remove leading and trailing spaces from an input string
 656 sub unpad
 657 {
 658         my $s = shift;
 659         $s =~ s/^\s+|\s+$//;
 660         return $s;
 661 }
 662 1;
 663 __END__