perl/DXMsg.pm

   1 #!/usr/bin/perl
   2 #
   3 # This module impliments the message handling for a dx cluster
   4 #
   5 # Copyright (c) 1998 Dirk Koopman G1TLH
   6 #
   7 # $Id$
   8 #
   9 #
  10 # Notes for implementors:-
  11 #
  12 # PC28 field 11 is the RR required flag
  13 # PC28 field 12 is a VIA routing (ie it is a node call)
  14 #
  15
  16 package DXMsg;
  17
  18 @ISA = qw(DXProt DXChannel);
  19
  20 use DXUtil;
  21 use DXChannel;
  22 use DXUser;
  23 use DXM;
  24 use DXCluster;
  25 use DXProtVars;
  26 use DXProtout;
  27 use DXDebug;
  28 use DXLog;
  29 use IO::File;
  30 use Fcntl;
  31 use Carp;
  32
  33 use strict;
  34 use vars qw(%work @msg $msgdir %valid %busy $maxage $last_clean
  35                         @badmsg $badmsgfn $forwardfn @forward $timeout $waittime
  36                     $queueinterval $lastq);
  37
  38 %work = ();                                             # outstanding jobs
  39 @msg = ();                                              # messages we have
  40 %busy = ();                                             # station interlocks
  41 $msgdir = "$main::root/msg";    # directory contain the msgs
  42 $maxage = 30 * 86400;                   # the maximum age that a message shall live for if not marked
  43 $last_clean = 0;                                # last time we did a clean
  44 @forward = ();                  # msg forward table
  45 $timeout = 30*60;               # forwarding timeout
  46 $waittime = 60*60;              # time an aborted outgoing message waits before trying again
  47 $queueinterval = 2*60;          # run the queue every 2 minutes
  48 $lastq = 0;
  49
  50
  51 $badmsgfn = "$msgdir/badmsg.pl";  # list of TO address we wont store
  52 $forwardfn = "$msgdir/forward.pl";  # the forwarding table
  53
  54 %valid = (
  55                   fromnode => '5,From Node',
  56                   tonode => '5,To Node',
  57                   to => '0,To',
  58                   from => '0,From',
  59                   t => '0,Msg Time,cldatetime',
  60                   private => '5,Private',
  61                   subject => '0,Subject',
  62                   linesreq => '0,Lines per Gob',
  63                   rrreq => '5,Read Confirm',
  64                   origin => '0,Origin',
  65                   lines => '5,Data',
  66                   stream => '9,Stream No',
  67                   count => '5,Gob Linecnt',
  68                   file => '5,File?,yesno',
  69                   gotit => '5,Got it Nodes,parray',
  70                   lines => '5,Lines,parray',
  71                   'read' => '5,Times read',
  72                   size => '0,Size',
  73                   msgno => '0,Msgno',
  74                   keep => '0,Keep this?,yesno',
  75                   lastt => '5,Last processed,cldatetime',
  76                   waitt => '5,Wait until,cldatetime',
  77                  );
  78
  79 sub DESTROY
  80 {
  81         my $self = shift;
  82         undef $self->{lines};
  83         undef $self->{gotit};
  84 }
  85
  86 # allocate a new object
  87 # called fromnode, tonode, from, to, datetime, private?, subject, nolinesper
  88 sub alloc
  89 {
  90         my $pkg = shift;
  91         my $self = bless {}, $pkg;
  92         $self->{msgno} = shift;
  93         my $to = shift;
  94         #  $to =~ s/-\d+$//o;
  95         $self->{to} = ($to eq $main::mycall) ? $main::myalias : $to;
  96         my $from = shift;
  97         $from =~ s/-\d+$//o;
  98         $self->{from} = uc $from;
  99         $self->{t} = shift;
 100         $self->{private} = shift;
 101         $self->{subject} = shift;
 102         $self->{origin} = shift;
 103         $self->{'read'} = shift;
 104         $self->{rrreq} = shift;
 105         $self->{gotit} = [];
 106         $self->{lastt} = $main::systime;
 107
 108         return $self;
 109 }
 110
 111 sub workclean
 112 {
 113         my $ref = shift;
 114         delete $ref->{lines};
 115         delete $ref->{linesreq};
 116         delete $ref->{tonode};
 117         delete $ref->{fromnode};
 118         delete $ref->{stream};
 119         delete $ref->{lines};
 120         delete $ref->{file};
 121         delete $ref->{count};
 122         delete $ref->{lastt} if exists $ref->{lastt};
 123         delete $ref->{waitt} if exists $ref->{waitt};
 124 }
 125
 126 sub process
 127 {
 128         my ($self, $line) = @_;
 129
 130         # this is periodic processing
 131         if (!$self || !$line) {
 132
 133                 # wander down the work queue stopping any messages that have timed out
 134                 for (keys %busy) {
 135                         my $node = $_;
 136                         my $ref = $busy{$_};
 137                         if (exists $ref->{lastt} && $main::systime > $ref->{lastt} + $timeout) {
 138                                 dbg('msg', "Timeout, stopping msgno: $ref->{msgno} -> $node");
 139                                 $ref->stop_msg($node);
 140
 141                                 # delay any outgoing messages that fail
 142                                 $ref->{waitt} = $main::systime + $waittime + rand(120) if $node ne $main::mycall;
 143                         }
 144                 }
 145
 146                 # queue some message if the interval timer has gone off
 147                 if ($main::systime > $lastq + $queueinterval) {
 148                         queue_msg(0);
 149                         $lastq = $main::systime;
 150                 }
 151
 152                 # clean the message queue
 153                 clean_old() if $main::systime - $last_clean > 3600 ;
 154                 return;
 155         }
 156
 157         my @f = split /\^/, $line;
 158         my ($pcno) = $f[0] =~ /^PC(\d\d)/; # just get the number
 159
 160  SWITCH: {
 161                 if ($pcno == 28) {              # incoming message
 162
 163                         # first look for any messages in the busy queue
 164                         # and cancel them this should both resolve timed out incoming messages
 165                         # and crossing of message between nodes, incoming messages have priority
 166                         if (exists $busy{$f[2]}) {
 167                                 my $ref = $busy{$f[2]};
 168                                 my $tonode = $ref->{tonode};
 169                                 dbg('msg', "Busy, stopping msgno: $ref->{msgno} -> $f[2]");
 170                                 $ref->stop_msg($self->call);
 171                         }
 172
 173                         my $t = cltounix($f[5], $f[6]);
 174                         my $stream = next_transno($f[2]);
 175                         my $ref = DXMsg->alloc($stream, uc $f[3], $f[4], $t, $f[7], $f[8], $f[13], '0', $f[11]);
 176
 177                         # fill in various forwarding state variables
 178                         $ref->{fromnode} = $f[2];
 179                         $ref->{tonode} = $f[1];
 180                         $ref->{rrreq} = $f[11];
 181                         $ref->{linesreq} = $f[10];
 182                         $ref->{stream} = $stream;
 183                         $ref->{count} = 0;      # no of lines between PC31s
 184                         dbg('msg', "new message from $f[4] to $f[3] '$f[8]' stream $stream\n");
 185                         $work{"$f[2]$stream"} = $ref; # store in work
 186                         $busy{$f[2]} = $ref; # set interlock
 187                         $self->send(DXProt::pc30($f[2], $f[1], $stream)); # send ack
 188                         $ref->{lastt} = $main::systime;
 189
 190                         # look to see whether this is a non private message sent to a known callsign
 191                         my $uref = DXUser->get_current($ref->{to});
 192                         if (iscallsign($ref->{to}) && !$ref->{private} && $uref && $uref->homenode) {
 193                                 $ref->{private} = 1;
 194                                 dbg('msg', "set bull to $ref->{to} to private");
 195                         }
 196                         last SWITCH;
 197                 }
 198
 199                 if ($pcno == 29) {              # incoming text
 200                         my $ref = $work{"$f[2]$f[3]"};
 201                         if ($ref) {
 202                                 push @{$ref->{lines}}, $f[4];
 203                                 $ref->{count}++;
 204                                 if ($ref->{count} >= $ref->{linesreq}) {
 205                                         $self->send(DXProt::pc31($f[2], $f[1], $f[3]));
 206                                         dbg('msg', "stream $f[3]: $ref->{count} lines received\n");
 207                                         $ref->{count} = 0;
 208                                 }
 209                                 $ref->{lastt} = $main::systime;
 210                         } else {
 211                                 dbg('msg', "PC29 from unknown stream $f[3] from $f[2]" );
 212                                 $self->send(DXProt::pc42($f[2], $f[1], $f[3])); # unknown stream
 213                         }
 214                         last SWITCH;
 215                 }
 216
 217                 if ($pcno == 30) {              # this is a incoming subject ack
 218                         my $ref = $work{$f[2]}; # note no stream at this stage
 219                         if ($ref) {
 220                                 delete $work{$f[2]};
 221                                 $ref->{stream} = $f[3];
 222                                 $ref->{count} = 0;
 223                                 $ref->{linesreq} = 5;
 224                                 $work{"$f[2]$f[3]"} = $ref;     # new ref
 225                                 dbg('msg', "incoming subject ack stream $f[3]\n");
 226                                 $busy{$f[2]} = $ref; # interlock
 227                                 $ref->{lines} = [];
 228                                 push @{$ref->{lines}}, ($ref->read_msg_body);
 229                                 $ref->send_tranche($self);
 230                                 $ref->{lastt} = $main::systime;
 231                         } else {
 232                                 dbg('msg', "PC30 from unknown stream $f[3] from $f[2]" );
 233                                 $self->send(DXProt::pc42($f[2], $f[1], $f[3])); # unknown stream
 234                         }
 235                         last SWITCH;
 236                 }
 237
 238                 if ($pcno == 31) {              # acknowledge a tranche of lines
 239                         my $ref = $work{"$f[2]$f[3]"};
 240                         if ($ref) {
 241                                 dbg('msg', "tranche ack stream $f[3]\n");
 242                                 $ref->send_tranche($self);
 243                                 $ref->{lastt} = $main::systime;
 244                         } else {
 245                                 dbg('msg', "PC31 from unknown stream $f[3] from $f[2]" );
 246                                 $self->send(DXProt::pc42($f[2], $f[1], $f[3])); # unknown stream
 247                         }
 248                         last SWITCH;
 249                 }
 250
 251                 if ($pcno == 32) {              # incoming EOM
 252                         dbg('msg', "stream $f[3]: EOM received\n");
 253                         my $ref = $work{"$f[2]$f[3]"};
 254                         if ($ref) {
 255                                 $self->send(DXProt::pc33($f[2], $f[1], $f[3])); # acknowledge it
 256
 257                                 # get the next msg no - note that this has NOTHING to do with the stream number in PC protocol
 258                                 # store the file or message
 259                                 # remove extraneous rubbish from the hash
 260                                 # remove it from the work in progress vector
 261                                 # stuff it on the msg queue
 262                                 if ($ref->{lines} && @{$ref->{lines}} > 0) { # ignore messages with 0 lines
 263                                         if ($ref->{file}) {
 264                                                 $ref->store($ref->{lines});
 265                                         } else {
 266
 267                                                 # does an identical message already exist?
 268                                                 my $m;
 269                                                 for $m (@msg) {
 270                                                         if ($ref->{subject} eq $m->{subject} && $ref->{t} == $m->{t} && $ref->{from} eq $m->{from}) {
 271                                                                 $ref->stop_msg($self->call);
 272                                                                 my $msgno = $m->{msgno};
 273                                                                 dbg('msg', "duplicate message to $msgno\n");
 274                                                                 Log('msg', "duplicate message to $msgno");
 275                                                                 return;
 276                                                         }
 277                                                 }
 278
 279                                                 # look for 'bad' to addresses
 280                                                 if (grep $ref->{to} eq $_, @badmsg) {
 281                                                         $ref->stop_msg($self->call);
 282                                                         dbg('msg', "'Bad' TO address $ref->{to}");
 283                                                         Log('msg', "'Bad' TO address $ref->{to}");
 284                                                         return;
 285                                                 }
 286
 287                                                 $ref->{msgno} = next_transno("Msgno");
 288                                                 push @{$ref->{gotit}}, $f[2]; # mark this up as being received
 289                                                 $ref->store($ref->{lines});
 290                                                 add_dir($ref);
 291                                                 my $dxchan = DXChannel->get($ref->{to});
 292                                                 $dxchan->send($dxchan->msg('m9')) if $dxchan && $dxchan->is_user;
 293                                                 Log('msg', "Message $ref->{msgno} from $ref->{from} received from $f[2] for $ref->{to}");
 294                                         }
 295                                 }
 296                                 $ref->stop_msg($self->call);
 297                         } else {
 298                                 dbg('msg', "PC32 from unknown stream $f[3] from $f[2]" );
 299                                 $self->send(DXProt::pc42($f[2], $f[1], $f[3])); # unknown stream
 300                         }
 301                         # queue_msg(0);
 302                         last SWITCH;
 303                 }
 304
 305                 if ($pcno == 33) {              # acknowledge the end of message
 306                         my $ref = $work{"$f[2]$f[3]"};
 307                         if ($ref) {
 308                                 if ($ref->{private}) { # remove it if it private and gone off site#
 309                                         Log('msg', "Message $ref->{msgno} from $ref->{from} sent to $f[2] and deleted");
 310                                         $ref->del_msg;
 311                                 } else {
 312                                         Log('msg', "Message $ref->{msgno} from $ref->{from} sent to $f[2]");
 313                                         push @{$ref->{gotit}}, $f[2]; # mark this up as being received
 314                                         $ref->store($ref->{lines});     # re- store the file
 315                                 }
 316                                 $ref->stop_msg($self->call);
 317                         } else {
 318                                 dbg('msg', "PC33 from unknown stream $f[3] from $f[2]" );
 319                                 $self->send(DXProt::pc42($f[2], $f[1], $f[3])); # unknown stream
 320                         }
 321
 322                         # send next one if present
 323                         queue_msg(0);
 324                         last SWITCH;
 325                 }
 326
 327                 if ($pcno == 40) {              # this is a file request
 328                         $f[3] =~ s/\\/\//og; # change the slashes
 329                         $f[3] =~ s/\.//og;      # remove dots
 330                         $f[3] =~ s/^\///o;   # remove the leading /
 331                         $f[3] = lc $f[3];       # to lower case;
 332                         dbg('msg', "incoming file $f[3]\n");
 333                         $f[3] = 'packclus/' . $f[3] unless $f[3] =~ /^packclus\//o;
 334
 335                         # create any directories
 336                         my @part = split /\//, $f[3];
 337                         my $part;
 338                         my $fn = "$main::root";
 339                         pop @part;                      # remove last part
 340                         foreach $part (@part) {
 341                                 $fn .= "/$part";
 342                                 next if -e $fn;
 343                                 last SWITCH if !mkdir $fn, 0777;
 344                                 dbg('msg', "created directory $fn\n");
 345                         }
 346                         my $stream = next_transno($f[2]);
 347                         my $ref = DXMsg->alloc($stream, "$main::root/$f[3]", $self->call, time, !$f[4], $f[3], ' ', '0', '0');
 348
 349                         # forwarding variables
 350                         $ref->{fromnode} = $f[1];
 351                         $ref->{tonode} = $f[2];
 352                         $ref->{linesreq} = $f[5];
 353                         $ref->{stream} = $stream;
 354                         $ref->{count} = 0;      # no of lines between PC31s
 355                         $ref->{file} = 1;
 356                         $ref->{lastt} = $main::systime;
 357                         $work{"$f[2]$stream"} = $ref; # store in work
 358                         $self->send(DXProt::pc30($f[2], $f[1], $stream)); # send ack
 359
 360                         last SWITCH;
 361                 }
 362
 363                 if ($pcno == 42) {              # abort transfer
 364                         dbg('msg', "stream $f[3]: abort received\n");
 365                         my $ref = $work{"$f[2]$f[3]"};
 366                         if ($ref) {
 367                                 $ref->stop_msg($self->call);
 368                                 $ref = undef;
 369                         }
 370
 371                         last SWITCH;
 372                 }
 373
 374                 if ($pcno == 49) {      # global delete on subject
 375                         for (@msg) {
 376                                 if ($_->{from} eq $f[1] && $_->{subject} eq $f[2]) {
 377                                         $_->del_msg();
 378                                         Log('msg', "Message $_->{msgno} from $_->{from} ($_->{subject}) fully deleted");
 379                                         DXProt::broadcast_ak1a($line, $self);
 380                                 }
 381                         }
 382                 }
 383         }
 384 }
 385
 386
 387 # store a message away on disc or whatever
 388 #
 389 # NOTE the second arg is a REFERENCE not a list
 390 sub store
 391 {
 392         my $ref = shift;
 393         my $lines = shift;
 394
 395         # we only proceed if there are actually any lines in the file
 396 #       if (!$lines || @{$lines} == 0) {
 397 #               return;
 398 #       }
 399
 400         if ($ref->{file}) {                     # a file
 401                 dbg('msg', "To be stored in $ref->{to}\n");
 402
 403                 my $fh = new IO::File "$ref->{to}", "w";
 404                 if (defined $fh) {
 405                         my $line;
 406                         foreach $line (@{$lines}) {
 407                                 print $fh "$line\n";
 408                         }
 409                         $fh->close;
 410                         dbg('msg', "file $ref->{to} stored\n");
 411                         Log('msg', "file $ref->{to} from $ref->{from} stored" );
 412                 } else {
 413                         confess "can't open file $ref->{to} $!";
 414                 }
 415         } else {                                        # a normal message
 416
 417                 # attempt to open the message file
 418                 my $fn = filename($ref->{msgno});
 419
 420                 dbg('msg', "To be stored in $fn\n");
 421
 422                 # now save the file, overwriting what's there, YES I KNOW OK! (I will change it if it's a problem)
 423                 my $fh = new IO::File "$fn", "w";
 424                 if (defined $fh) {
 425                         my $rr = $ref->{rrreq} ? '1' : '0';
 426                         my $priv = $ref->{private} ? '1': '0';
 427                         print $fh "=== $ref->{msgno}^$ref->{to}^$ref->{from}^$ref->{t}^$priv^$ref->{subject}^$ref->{origin}^$ref->{'read'}^$rr\n";
 428                         print $fh "=== ", join('^', @{$ref->{gotit}}), "\n";
 429                         my $line;
 430                         $ref->{size} = 0;
 431                         foreach $line (@{$lines}) {
 432                                 $ref->{size} += (length $line) + 1;
 433                                 print $fh "$line\n";
 434                         }
 435                         $fh->close;
 436                         dbg('msg', "msg $ref->{msgno} stored\n");
 437                         Log('msg', "msg $ref->{msgno} from $ref->{from} to $ref->{to} stored" );
 438                 } else {
 439                         confess "can't open msg file $fn $!";
 440                 }
 441         }
 442 }
 443
 444 # delete a message
 445 sub del_msg
 446 {
 447         my $self = shift;
 448
 449         # remove it from the active message list
 450         @msg = map { $_ != $self ? $_ : () } @msg;
 451
 452         # belt and braces (one day I will ask someone if this is REALLY necessary)
 453         delete $self->{gotit};
 454         delete $self->{list};
 455
 456         # remove the file
 457         unlink filename($self->{msgno});
 458         dbg('msg', "deleting $self->{msgno}\n");
 459 }
 460
 461 # clean out old messages from the message queue
 462 sub clean_old
 463 {
 464         my $ref;
 465
 466         # mark old messages for deletion
 467         foreach $ref (@msg) {
 468                 if (!$ref->{keep} && $ref->{t} < $main::systime - $maxage) {
 469                         $ref->{deleteme} = 1;
 470                         delete $ref->{gotit};
 471                         delete $ref->{list};
 472                         unlink filename($ref->{msgno});
 473                         dbg('msg', "deleting old $ref->{msgno}\n");
 474                 }
 475         }
 476
 477         # remove them all from the active message list
 478         @msg = map { $_->{deleteme} ? () : $_ } @msg;
 479         $last_clean = $main::systime;
 480 }
 481
 482 # read in a message header
 483 sub read_msg_header
 484 {
 485         my $fn = shift;
 486         my $file;
 487         my $line;
 488         my $ref;
 489         my @f;
 490         my $size;
 491
 492         $file = new IO::File;
 493         if (!open($file, $fn)) {
 494                 print "Error reading $fn $!\n";
 495                 return undef;
 496         }
 497         $size = -s $fn;
 498         $line = <$file>;                        # first line
 499         chomp $line;
 500         $size -= length $line;
 501         if (! $line =~ /^===/o) {
 502                 print "corrupt first line in $fn ($line)\n";
 503                 return undef;
 504         }
 505         $line =~ s/^=== //o;
 506         @f = split /\^/, $line;
 507         $ref = DXMsg->alloc(@f);
 508
 509         $line = <$file>;                        # second line
 510         chomp $line;
 511         $size -= length $line;
 512         if (! $line =~ /^===/o) {
 513                 print "corrupt second line in $fn ($line)\n";
 514                 return undef;
 515         }
 516         $line =~ s/^=== //o;
 517         $ref->{gotit} = [];
 518         @f = split /\^/, $line;
 519         push @{$ref->{gotit}}, @f;
 520         $ref->{size} = $size;
 521
 522         close($file);
 523
 524         return $ref;
 525 }
 526
 527 # read in a message header
 528 sub read_msg_body
 529 {
 530         my $self = shift;
 531         my $msgno = $self->{msgno};
 532         my $file;
 533         my $line;
 534         my $fn = filename($msgno);
 535         my @out;
 536
 537         $file = new IO::File;
 538         if (!open($file, $fn)) {
 539                 print "Error reading $fn $!\n";
 540                 return undef;
 541         }
 542         chomp (@out = <$file>);
 543         close($file);
 544
 545         shift @out if $out[0] =~ /^=== /;
 546         shift @out if $out[0] =~ /^=== /;
 547         return @out;
 548 }
 549
 550 # send a tranche of lines to the other end
 551 sub send_tranche
 552 {
 553         my ($self, $dxchan) = @_;
 554         my @out;
 555         my $to = $self->{tonode};
 556         my $from = $self->{fromnode};
 557         my $stream = $self->{stream};
 558         my $lines = $self->{lines};
 559         my ($c, $i);
 560
 561         for ($i = 0, $c = $self->{count}; $i < $self->{linesreq} && $c < @$lines; $i++, $c++) {
 562                 push @out, DXProt::pc29($to, $from, $stream, $lines->[$c]);
 563     }
 564     $self->{count} = $c;
 565
 566     push @out, DXProt::pc32($to, $from, $stream) if $i < $self->{linesreq};
 567         $dxchan->send(@out);
 568 }
 569
 570
 571 # find a message to send out and start the ball rolling
 572 sub queue_msg
 573 {
 574         my $sort = shift;
 575         my $call = shift;
 576         my $ref;
 577         my $clref;
 578         my $dxchan;
 579         my @nodelist = DXProt::get_all_ak1a();
 580
 581         # bat down the message list looking for one that needs to go off site and whose
 582         # nearest node is not busy.
 583
 584         dbg('msg', "queue msg ($sort)\n");
 585         foreach $ref (@msg) {
 586                 # firstly, is it private and unread? if so can I find the recipient
 587                 # in my cluster node list offsite?
 588
 589                 # ignore 'delayed' messages until their waiting time has expired
 590                 if (exists $ref->{waitt}) {
 591                         next if $ref->{waitt} > $main::systime;
 592                         delete $ref->{waitt};
 593                 }
 594
 595                 if ($ref->{private}) {
 596                         if ($ref->{'read'} == 0) {
 597                                 $clref = DXCluster->get_exact($ref->{to});
 598                                 unless ($clref) {             # otherwise look for a homenode
 599                                         my $uref = DXUser->get($ref->{to});
 600                                         my $hnode =  $uref->homenode if $uref;
 601                                         $clref = DXCluster->get_exact($hnode) if $hnode;
 602                                 }
 603                                 if ($clref && !grep { $clref->{dxchan} == $_ } DXCommandmode::get_all) {
 604                                         $dxchan = $clref->{dxchan};
 605                                         $ref->start_msg($dxchan) if $dxchan && $clref && !get_busy($dxchan->call) && $dxchan->state eq 'normal';
 606                                 }
 607                         }
 608                 } elsif (!$sort) {
 609                         # otherwise we are dealing with a bulletin, compare the gotit list with
 610                         # the nodelist up above, if there are sites that haven't got it yet
 611                         # then start sending it - what happens when we get loops is anyone's
 612                         # guess, use (to, from, time, subject) tuple?
 613                         my $noderef;
 614                         foreach $noderef (@nodelist) {
 615                                 next if $noderef->call eq $main::mycall;
 616                                 next if grep { $_ eq $noderef->call } @{$ref->{gotit}};
 617                                 next unless $ref->forward_it($noderef->call);           # check the forwarding file
 618                                 # next if $noderef->isolate;               # maybe add code for stuff originated here?
 619                                 # next if DXUser->get( ${$ref->{gotit}}[0] )->isolate;  # is the origin isolated?
 620
 621                                 # if we are here we have a node that doesn't have this message
 622                                 $ref->start_msg($noderef) if !get_busy($noderef->call)  && $noderef->state eq 'normal';
 623                                 last;
 624                         }
 625                 }
 626
 627                 # if all the available nodes are busy then stop
 628                 last if @nodelist == scalar grep { get_busy($_->call) } @nodelist;
 629         }
 630 }
 631
 632 # is there a message for me?
 633 sub for_me
 634 {
 635         my $call = uc shift;
 636         my $ref;
 637
 638         foreach $ref (@msg) {
 639                 # is it for me, private and unread?
 640                 if ($ref->{to} eq $call && $ref->{private}) {
 641                         return 1 if !$ref->{'read'};
 642                 }
 643         }
 644         return 0;
 645 }
 646
 647 # start the message off on its travels with a PC28
 648 sub start_msg
 649 {
 650         my ($self, $dxchan) = @_;
 651
 652         dbg('msg', "start msg $self->{msgno}\n");
 653         $self->{linesreq} = 5;
 654         $self->{count} = 0;
 655         $self->{tonode} = $dxchan->call;
 656         $self->{fromnode} = $main::mycall;
 657         $busy{$self->{tonode}} = $self;
 658         $work{$self->{tonode}} = $self;
 659         $self->{lastt} = $main::systime;
 660         $dxchan->send(DXProt::pc28($self->{tonode}, $self->{fromnode}, $self->{to}, $self->{from}, $self->{t}, $self->{private}, $self->{subject}, $self->{origin}, $self->{rrreq}));
 661 }
 662
 663 # get the ref of a busy node
 664 sub get_busy
 665 {
 666         my $call = shift;
 667         return $busy{$call};
 668 }
 669
 670 # get the busy queue
 671 sub get_all_busy
 672 {
 673         return values %busy;
 674 }
 675
 676 # get the forwarding queue
 677 sub get_fwq
 678 {
 679         return values %work;
 680 }
 681
 682 # stop a message from continuing, clean it out, unlock interlocks etc
 683 sub stop_msg
 684 {
 685         my $self = shift;
 686         my $node = shift;
 687         my $stream = $self->{stream} if exists $self->{stream};
 688
 689
 690         dbg('msg', "stop msg $self->{msgno} -> node $node\n");
 691         delete $work{$node};
 692         delete $work{"$node$stream"} if $stream;
 693         $self->workclean;
 694         delete $busy{$node};
 695 }
 696
 697 # get a new transaction number from the file specified
 698 sub next_transno
 699 {
 700         my $name = shift;
 701         $name =~ s/\W//og;                      # remove non-word characters
 702         my $fn = "$msgdir/$name";
 703         my $msgno;
 704
 705         my $fh = new IO::File;
 706         if (sysopen($fh, $fn, O_RDWR|O_CREAT, 0666)) {
 707                 $fh->autoflush(1);
 708                 $msgno = $fh->getline;
 709                 chomp $msgno;
 710                 $msgno++;
 711                 seek $fh, 0, 0;
 712                 $fh->print("$msgno\n");
 713                 dbg('msg', "msgno $msgno allocated for $name\n");
 714                 $fh->close;
 715         } else {
 716                 confess "can't open $fn $!";
 717         }
 718         return $msgno;
 719 }
 720
 721 # initialise the message 'system', read in all the message headers
 722 sub init
 723 {
 724         my $dir = new IO::File;
 725         my @dir;
 726         my $ref;
 727
 728         # load various control files
 729         my @in = load_badmsg();
 730         print "@in\n" if @in;
 731         @in = load_forward();
 732         print "@in\n" if @in;
 733
 734         # read in the directory
 735         opendir($dir, $msgdir) or confess "can't open $msgdir $!";
 736         @dir = readdir($dir);
 737         closedir($dir);
 738
 739         @msg = ();
 740         for (sort @dir) {
 741                 next unless /^m\d+$/o;
 742
 743                 $ref = read_msg_header("$msgdir/$_");
 744                 next unless $ref;
 745
 746                 # delete any messages to 'badmsg.pl' places
 747                 if (grep $ref->{to} eq $_, @badmsg) {
 748                         dbg('msg', "'Bad' TO address $ref->{to}");
 749                         Log('msg', "'Bad' TO address $ref->{to}");
 750                         $ref->del_msg;
 751                         next;
 752                 }
 753
 754                 # add the message to the available queue
 755                 add_dir($ref);
 756         }
 757 }
 758
 759 # add the message to the directory listing
 760 sub add_dir
 761 {
 762         my $ref = shift;
 763         confess "tried to add a non-ref to the msg directory" if !ref $ref;
 764         push @msg, $ref;
 765 }
 766
 767 # return all the current messages
 768 sub get_all
 769 {
 770         return @msg;
 771 }
 772
 773 # get a particular message
 774 sub get
 775 {
 776         my $msgno = shift;
 777         for (@msg) {
 778                 return $_ if $_->{msgno} == $msgno;
 779                 last if $_->{msgno} > $msgno;
 780         }
 781         return undef;
 782 }
 783
 784 # return the official filename for a message no
 785 sub filename
 786 {
 787         return sprintf "$msgdir/m%06d", shift;
 788 }
 789
 790 #
 791 # return a list of valid elements
 792 #
 793
 794 sub fields
 795 {
 796         return keys(%valid);
 797 }
 798
 799 #
 800 # return a prompt for a field
 801 #
 802
 803 sub field_prompt
 804 {
 805         my ($self, $ele) = @_;
 806         return $valid{$ele};
 807 }
 808
 809 #
 810 # send a message state machine
 811 sub do_send_stuff
 812 {
 813         my $self = shift;
 814         my $line = shift;
 815         my @out;
 816
 817         if ($self->state eq 'send1') {
 818                 #  $DB::single = 1;
 819                 confess "local var gone missing" if !ref $self->{loc};
 820                 my $loc = $self->{loc};
 821                 $loc->{subject} = $line;
 822                 $loc->{lines} = [];
 823                 $self->state('sendbody');
 824                 #push @out, $self->msg('sendbody');
 825                 push @out, $self->msg('m8');
 826         } elsif ($self->state eq 'sendbody') {
 827                 confess "local var gone missing" if !ref $self->{loc};
 828                 my $loc = $self->{loc};
 829                 if ($line eq "\032" || uc $line eq "/EX") {
 830                         my $to;
 831
 832                         if (@{$loc->{lines}} > 0) {
 833                                 foreach $to (@{$loc->{to}}) {
 834                                         my $ref;
 835                                         my $systime = $main::systime;
 836                                         my $mycall = $main::mycall;
 837                                         $ref = DXMsg->alloc(DXMsg::next_transno('Msgno'),
 838                                                                                 uc $to,
 839                                                                                 $self->call,
 840                                                                                 $systime,
 841                                                                                 $loc->{private},
 842                                                                                 $loc->{subject},
 843                                                                                 $mycall,
 844                                                                                 '0',
 845                                                                                 $loc->{rrreq});
 846                                         $ref->store($loc->{lines});
 847                                         $ref->add_dir();
 848                                         push @out, $self->msg('m11', $ref->{msgno}, $to);
 849                                         #push @out, "msgno $ref->{msgno} sent to $to";
 850                                         my $dxchan = DXChannel->get(uc $to);
 851                                         if ($dxchan) {
 852                                                 if ($dxchan->is_user()) {
 853                                                         $dxchan->send($dxchan->msg('m9'));
 854                                                 }
 855                                         }
 856                                 }
 857                         }
 858                         delete $loc->{lines};
 859                         delete $loc->{to};
 860                         delete $self->{loc};
 861                         $self->func(undef);
 862
 863                         $self->state('prompt');
 864                 } elsif ($line eq "\031" || uc $line eq "/ABORT" || uc $line eq "/QUIT") {
 865                         #push @out, $self->msg('sendabort');
 866                         push @out, $self->msg('m10');
 867                         delete $loc->{lines};
 868                         delete $loc->{to};
 869                         delete $self->{loc};
 870                         $self->func(undef);
 871                         $self->state('prompt');
 872                 } else {
 873
 874                         # i.e. it ain't and end or abort, therefore store the line
 875                         push @{$loc->{lines}}, length($line) > 0 ? $line : " ";
 876                 }
 877         }
 878         return (1, @out);
 879 }
 880
 881 # return the standard directory line for this ref
 882 sub dir
 883 {
 884         my $ref = shift;
 885         return sprintf "%6d%s%s%5d %8.8s %8.8s %-6.6s %5.5s %-30.30s",
 886                 $ref->msgno, $ref->read ? '-' : ' ', $ref->private ? 'p' : ' ', $ref->size,
 887                         $ref->to, $ref->from, cldate($ref->t), ztime($ref->t), $ref->subject;
 888 }
 889
 890 # load the forward table
 891 sub load_forward
 892 {
 893         my @out;
 894         do "$forwardfn" if -e "$forwardfn";
 895         push @out, $@ if $@;
 896         return @out;
 897 }
 898
 899 # load the bad message table
 900 sub load_badmsg
 901 {
 902         my @out;
 903         do "$badmsgfn" if -e "$badmsgfn";
 904         push @out, $@ if $@;
 905         return @out;
 906 }
 907
 908 #
 909 # forward that message or not according to the forwarding table
 910 # returns 1 for forward, 0 - to ignore
 911 #
 912
 913 sub forward_it
 914 {
 915         my $ref = shift;
 916         my $call = shift;
 917         my $i;
 918
 919         for ($i = 0; $i < @forward; $i += 5) {
 920                 my ($sort, $field, $pattern, $action, $bbs) = @forward[$i..($i+4)];
 921                 my $tested;
 922
 923                 # are we interested?
 924                 last if $ref->{private} && $sort ne 'P';
 925                 last if !$ref->{private} && $sort ne 'B';
 926
 927                 # select field
 928                 $tested = $ref->{to} if $field eq 'T';
 929                 $tested = $ref->{from} if $field eq 'F';
 930                 $tested = $ref->{origin} if $field eq 'O';
 931                 $tested = $ref->{subject} if $field eq 'S';
 932
 933                 if (!$pattern || $tested =~ m{$pattern}i) {
 934                         return 0 if $action eq 'I';
 935                         return 1 if !$bbs || grep $_ eq $call, @{$bbs};
 936                 }
 937         }
 938         return 0;
 939 }
 940
 941 no strict;
 942 sub AUTOLOAD
 943 {
 944         my $self = shift;
 945         my $name = $AUTOLOAD;
 946         return if $name =~ /::DESTROY$/;
 947         $name =~ s/.*:://o;
 948
 949         confess "Non-existant field '$AUTOLOAD'" if !$valid{$name};
 950         @_ ? $self->{$name} = shift : $self->{$name} ;
 951 }
 952
 953 1;
 954
 955 __END__