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1 #!/usr/bin/perl
2 #
3 # This module impliments the protocal mode for a dx cluster
4 #
5 # Copyright (c) 1998 Dirk Koopman G1TLH
6 #
7 # $Id$
8
9
10 package DXProt;
11
12 @ISA = qw(DXChannel);
13
14 use DXUtil;
15 use DXChannel;
16 use DXUser;
17 use DXM;
18 use DXCluster;
19 use DXProtVars;
20 use DXCommandmode;
21 use DXLog;
22 use Spot;
23 use DXProtout;
24 use DXDebug;
25 use Filter;
26 use Local;
27
28 use Carp;
29
30 use strict;
31 use vars qw($me $pc11_max_age $pc23_max_age $pc11_dup_age $pc23_dup_age
32                         %spotdup %wwvdup $last_hour %pings %rcmds
33                         %nodehops @baddx $baddxfn $pc12_dup_age
34                         %anndup $allowzero $pc12_dup_lth $decode_dk0wcy);
35
36 $me = undef;                                    # the channel id for this cluster
37 $decode_dk0wcy = undef;                 # if set use this callsign to decode announces from the EU WWV data beacon
38 $pc11_max_age = 1*3600;                 # the maximum age for an incoming 'real-time' pc11
39 $pc23_max_age = 1*3600;                 # the maximum age for an incoming 'real-time' pc23
40 $pc11_dup_age = 24*3600;                # the maximum time to keep the spot dup list for
41 $pc23_dup_age = 24*3600;                # the maximum time to keep the wwv dup list for
42 $pc12_dup_age = 12*3600;                # the maximum time to keep the ann dup list for
43 $pc12_dup_lth = 72;                             # the length of ANN text to save for deduping 
44 %spotdup = ();                              # the pc11 and 26 dup hash 
45 %wwvdup = ();                               # the pc23 and 27 dup hash
46 %anndup = ();                               # the PC12 dup hash
47 $last_hour = time;                              # last time I did an hourly periodic update
48 %pings = ();                    # outstanding ping requests outbound
49 %rcmds = ();                    # outstanding rcmd requests outbound
50 %nodehops = ();                 # node specific hop control
51 @baddx = ();                    # list of illegal spotted callsigns
52
53 $baddxfn = "$main::data/baddx.pl";
54
55 sub init
56 {
57         my $user = DXUser->get($main::mycall);
58         $DXProt::myprot_version += $main::version*100;
59         $me = DXProt->new($main::mycall, 0, $user); 
60         $me->{here} = 1;
61         $me->{state} = "indifferent";
62         do "$main::data/hop_table.pl" if -e "$main::data/hop_table.pl";
63         confess $@ if $@;
64         #  $me->{sort} = 'M';    # M for me
65
66         # now prime the spot duplicates file with today's and yesterday's data
67     my @today = Julian::unixtoj(time);
68         my @spots = Spot::readfile(@today);
69         @today = Julian::sub(@today, 1);
70         push @spots, Spot::readfile(@today);
71         for (@spots) {
72                 my $dupkey = "$_->[0]$_->[1]$_->[2]$_->[3]$_->[4]";
73                 $spotdup{$dupkey} = $_->[2];
74         }
75
76         # now prime the wwv duplicates file with just this month's data
77         my @wwv = Geomag::readfile(time);
78         for (@wwv) {
79                 my $dupkey = "$_->[1].$_->[2]$_->[3]$_->[4]";
80                 $wwvdup{$dupkey} = $_->[1];
81         }
82
83         # load the baddx file
84         do "$baddxfn" if -e "$baddxfn";
85         print "$@\n" if $@;
86 }
87
88 #
89 # obtain a new connection this is derived from dxchannel
90 #
91
92 sub new 
93 {
94         my $self = DXChannel::alloc(@_);
95         $self->{'sort'} = 'A';          # in absence of how to find out what sort of an object I am
96         return $self;
97 }
98
99 # this is how a pc connection starts (for an incoming connection)
100 # issue a PC38 followed by a PC18, then wait for a PC20 (remembering
101 # all the crap that comes between).
102 sub start
103 {
104         my ($self, $line, $sort) = @_;
105         my $call = $self->{call};
106         my $user = $self->{user};
107         
108         # remember type of connection
109         $self->{consort} = $line;
110         $self->{outbound} = $sort eq 'O';
111         $self->{priv} = $user->priv;
112         $self->{lang} = $user->lang;
113         $self->{isolate} = $user->{isolate};
114         $self->{consort} = $line;       # save the connection type
115         $self->{here} = 1;
116
117         # get the INPUT filters (these only pertain to Clusters)
118         $self->{inspotfilter} = Filter::read_in('spots', $call, 1);
119         $self->{inwwvfilter} = Filter::read_in('wwv', $call, 1);
120         $self->{inannfilter} = Filter::read_in('ann', $call, 1);
121         
122         # set unbuffered and no echo
123         $self->send_now('B',"0");
124         $self->send_now('E',"0");
125         
126         # send initialisation string
127         if (!$self->{outbound}) {
128                 $self->send(pc38()) if DXNode->get_all();
129                 $self->send(pc18());
130         }
131         $self->state('init');
132         $self->pc50_t(time);
133
134         Log('DXProt', "$call connected");
135 }
136
137 #
138 # This is the normal pcxx despatcher
139 #
140 sub normal
141 {
142         my ($self, $line) = @_;
143         my @field = split /\^/, $line;
144         pop @field if $field[-1] eq '~';
145         
146 #       print join(',', @field), "\n";
147                                                 
148         # ignore any lines that don't start with PC
149         return if !$field[0] =~ /^PC/;
150         
151         # process PC frames
152         my ($pcno) = $field[0] =~ /^PC(\d\d)/; # just get the number
153         return unless $pcno;
154         return if $pcno < 10 || $pcno > 51;
155
156         # dump bad protocol messages unless it is a PC29
157         if ($line =~ /\%[0-9A-F][0-9A-F]/o && $pcno != 29) {
158                 dbg('chan', "CORRUPT protocol message - dumped");
159                 return;
160         }
161
162         # local processing 1
163         my $pcr;
164         eval {
165                 $pcr = Local::pcprot($self, $pcno, @field);
166         };
167 #       dbg('local', "Local::pcprot error $@") if $@;
168         return if $pcr;
169         
170  SWITCH: {
171                 if ($pcno == 10) {              # incoming talk
172                         
173                         # is it for me or one of mine?
174                         my $call = ($field[5] gt ' ') ? $field[5] : $field[2];
175                         if ($call eq $main::mycall || grep $_ eq $call, get_all_user_calls()) {
176                                 
177                                 # yes, it is
178                                 my $text = unpad($field[3]);
179                                 Log('talk', $call, $field[1], $field[6], $text);
180                                 $call = $main::myalias if $call eq $main::mycall;
181                                 my $ref = DXChannel->get($call);
182                                 $ref->send("$call de $field[1]: $text") if $ref && $ref->{talk};
183                         } else {
184                                 route($field[2], $line); # relay it on its way
185                         }
186                         return;
187                 }
188                 
189                 if ($pcno == 11 || $pcno == 26) { # dx spot
190
191                         # route 'foreign' pc26s 
192                         if ($pcno == 26) {
193                                 if ($field[7] ne $main::mycall) {
194                                         route($field[7], $line);
195                                         return;
196                                 }
197                         }
198                         
199                         # if this is a 'nodx' node then ignore it
200                         if (grep $field[7] =~ /^$_/,  @DXProt::nodx_node) {
201                                 dbg('chan', "Bad DXNode, dropped");
202                                 return;
203                         }
204                         
205                         # convert the date to a unix date
206                         my $d = cltounix($field[3], $field[4]);
207                         # bang out (and don't pass on) if date is invalid or the spot is too old (or too young)
208                         if (!$d || ($pcno == 11 && ($d < $main::systime - $pc11_max_age || $d > $main::systime + 900))) {
209                                 dbg('chan', "Spot ignored, invalid date or out of range ($field[3] $field[4])\n");
210                                 return;
211                         }
212
213                         # strip off the leading & trailing spaces from the comment
214                         my $text = unpad($field[5]);
215                         
216                         # store it away
217                         my $spotter = $field[6];
218                         $spotter =~ s/-[\@\d]+$//o;     # strip off the ssid from the spotter
219                         
220                         # do some de-duping
221                         my $freq = $field[1] - 0;
222                         my $dupkey = "$freq$field[2]$d$text$spotter";
223                         if ($spotdup{$dupkey}) {
224                                 dbg('chan', "Duplicate Spot ignored\n");
225                                 return;
226                         }
227                         
228                         $spotdup{$dupkey} = $d;
229
230                         # is it 'baddx'
231                         if (grep $field[2] eq $_, @baddx) {
232                                 dbg('chan', "Bad DX spot, ignored");
233                                 return;
234                         }
235
236                         # are any of the crucial fields invalid?
237             if ($field[2] =~ /[a-z]/ || $field[6] =~ /[a-z]/ || $field[7] =~ /[a-z]/) {
238                                 dbg('chan', "Spot contains lower case callsigns, rejected");
239                                 return;
240                         }
241                         
242                         my @spot = Spot::add($freq, $field[2], $d, $text, $spotter, $field[7]);
243
244             #
245                         # @spot at this point contains:-
246             # freq, spotted call, time, text, spotter, spotted cc, spotters cc, orig node
247                         # then  spotted itu, spotted cq, spotters itu, spotters cq
248                         # you should be able to route on any of these
249             #
250                         
251                         # local processing 
252                         my $r;
253                         eval {
254                                 $r = Local::spot($self, @spot);
255                         };
256 #                       dbg('local', "Local::spot1 error $@") if $@;
257                         return if $r;
258
259                         # DON'T be silly and send on PC26s!
260                         return if $pcno == 26;
261
262                         # send out the filtered spots
263                         send_dx_spot($self, $line, @spot) if @spot;
264                         return;
265                 }
266                 
267                 if ($pcno == 12) {              # announces
268                         # announce duplicate checking
269                         my $text = substr(uc unpad($field[3]), 0, $pc12_dup_lth);
270                         my $dupkey = $field[1].$field[2].$text.$field[4].$field[6];
271                         if ($anndup{$dupkey}) {
272                                 dbg('chan', "Duplicate Announce ignored\n");
273                                 return;
274                         }
275                         $anndup{$dupkey} = $main::systime;
276                         
277                         if ($field[2] eq '*' || $field[2] eq $main::mycall) {
278                                 
279                                 # global ann filtering on INPUT
280                                 if ($self->{inannfilter}) {
281                                         my ($filter, $hops) = Filter::it($self->{inannfilter}, @field[1..6], $self->{call} );
282                                         unless ($filter) {
283                                                 dbg('chan', "Rejected by filter");
284                                                 return;
285                                         }
286                                 }
287
288                                 # send it
289                                 $self->send_announce($line, @field[1..6]);
290                                 
291                                 if ($decode_dk0wcy && $field[1] eq $decode_dk0wcy) {
292                                         my ($hour, $k, $next, $a, $r, $sfi, $alarm) = $field[3] =~ /^Aurora Beacon\s+(\d+)UTC,\s+Kiel\s+K=(\d+),.*ed\s+K=(\d+),\s+A=(\d+),\s+R=(\d+),\s+SFI=(\d+),.*larm:\s+(\w+)/;
293                                         $alarm = ($alarm =~ /^Y/i) ? ', Aurora in DE' : ''; 
294                                         my $wwv = Geomag::update($main::systime, $hour, $sfi, $a, $k, "R=$r, Next K=$next$alarm", $decode_dk0wcy, $field[5], $r);
295                                 }
296                                 
297                         } else {
298                                 route($field[2], $line);
299                         }
300                         
301                         return;
302                 }
303                 
304                 if ($pcno == 13) {
305                         last SWITCH;
306                 }
307                 if ($pcno == 14) {
308                         last SWITCH;
309                 }
310                 if ($pcno == 15) {
311                         last SWITCH;
312                 }
313                 
314                 if ($pcno == 16) {              # add a user
315                         my $node = DXCluster->get_exact($field[1]); 
316                         my $dxchan;
317                         if (!$node && ($dxchan = DXChannel->get($field[1]))) {
318                                 # add it to the node table if it isn't present and it's
319                                 # connected locally
320                                 $node = DXNode->new($dxchan, $field[1], 0, 1, 5400);
321                                 broadcast_ak1a(pc19($dxchan, $node), $dxchan, $self) unless $dxchan->{isolate};
322                                 
323                         }
324                         return unless $node; # ignore if havn't seen a PC19 for this one yet
325                         return unless $node->isa('DXNode');
326                         if ($node->dxchan != $self) {
327                                 dbg('chan', "LOOP: $field[1] came in on wrong channel");
328                                 return;
329                         }
330                         if (($dxchan = DXChannel->get($field[1])) && $dxchan != $self) {
331                                 dbg('chan', "LOOP: $field[1] connected locally");
332                                 return;
333                         }
334                         my $i;
335                                                 
336                         for ($i = 2; $i < $#field; $i++) {
337                                 my ($call, $confmode, $here) = $field[$i] =~ /^(\S+) (\S) (\d)/o;
338                                 next if !$call || length $call < 3 || length $call > 8;
339                                 next if !$confmode;
340                                 $call = uc $call;
341                                 next if DXCluster->get_exact($call); # we already have this (loop?)
342                                 
343                                 $confmode = $confmode eq '*';
344                                 DXNodeuser->new($self, $node, $call, $confmode, $here);
345                                 
346                                 # add this station to the user database, if required
347                                 $call =~ s/-\d+$//o;        # remove ssid for users
348                                 my $user = DXUser->get_current($call);
349                                 $user = DXUser->new($call) if !$user;
350                                 $user->homenode($node->call) if !$user->homenode;
351                                 $user->node($node->call);
352                                 $user->lastin($main::systime) unless DXChannel->get($call);
353                                 $user->put;
354                         }
355                         
356                         # queue up any messages (look for privates only)
357                         DXMsg::queue_msg(1) if $self->state eq 'normal';     
358                         last SWITCH;
359                 }
360                 
361                 if ($pcno == 17) {              # remove a user
362                         my $node = DXCluster->get_exact($field[2]);
363                         my $dxchan;
364                         if (!$node && ($dxchan = DXChannel->get($field[2]))) {
365                                 # add it to the node table if it isn't present and it's
366                                 # connected locally
367                                 $node = DXNode->new($dxchan, $field[2], 0, 1, 5400);
368                                 broadcast_ak1a(pc19($dxchan, $node), $dxchan, $self) unless $dxchan->{isolate};
369                                 return;
370                         }
371                         return unless $node;
372                         return unless $node->isa('DXNode');
373                         if ($node->dxchan != $self) {
374                                 dbg('chan', "LOOP: $field[2] came in on wrong channel");
375                                 return;
376                         }
377                         if (($dxchan = DXChannel->get($field[2])) && $dxchan != $self) {
378                                 dbg('chan', "LOOP: $field[2] connected locally");
379                                 return;
380                         }
381                         my $ref = DXCluster->get_exact($field[1]);
382                         $ref->del() if $ref;
383                         last SWITCH;
384                 }
385                 
386                 if ($pcno == 18) {              # link request
387                         $self->state('init');   
388
389                         # first clear out any nodes on this dxchannel
390                         my @gonenodes = map { $_->dxchan == $self ? $_ : () } DXNode::get_all();
391                         foreach my $node (@gonenodes) {
392                                 next if $node->dxchan == $DXProt::me;
393                                 broadcast_ak1a(pc21($node->call, 'Gone, re-init') , $self) unless $self->{isolate}; 
394                                 $node->del();
395                         }
396                         $self->send_local_config();
397                         $self->send(pc20());
398                         return;             # we don't pass these on
399                 }
400                 
401                 if ($pcno == 19) {              # incoming cluster list
402                         my $i;
403                         my $newline = "PC19^";
404                         for ($i = 1; $i < $#field-1; $i += 4) {
405                                 my $here = $field[$i];
406                                 my $call = uc $field[$i+1];
407                                 my $confmode = $field[$i+2];
408                                 my $ver = $field[$i+3];
409
410                                 $ver = 5400 if !$ver && $allowzero;
411                                 
412                                 # now check the call over
413                                 my $node = DXCluster->get_exact($call);
414                                 if ($node) {
415                                         my $dxchan;
416                                         if (($dxchan = DXChannel->get($call)) && $dxchan != $self) {
417                                                 dbg('chan', "LOOP: $call connected locally");
418                                         }
419                                     if ($node->dxchan != $self) {
420                                                 dbg('chan', "LOOP: $call come in on wrong channel");
421                                                 next;
422                                         }
423                                         dbg('chan', "already have $call");
424                                         next;
425                                 }
426                                 
427                                 # check for sane parameters
428                                 next if $ver < 5000; # only works with version 5 software
429                                 next if length $call < 3; # min 3 letter callsigns
430
431                                 # add it to the nodes table and outgoing line
432                                 $newline .= "$here^$call^$confmode^$ver^";
433                                 DXNode->new($self, $call, $confmode, $here, $ver);
434                                 
435                                 # unbusy and stop and outgoing mail (ie if somehow we receive another PC19 without a disconnect)
436                                 my $mref = DXMsg::get_busy($call);
437                                 $mref->stop_msg($call) if $mref;
438                                 
439                                 # add this station to the user database, if required (don't remove SSID from nodes)
440                                 my $user = DXUser->get_current($call);
441                                 if (!$user) {
442                                         $user = DXUser->new($call);
443                                         $user->sort('A');
444                                         $user->priv(1);                   # I have relented and defaulted nodes
445                                         $self->{priv} = 1;                # to user RCMDs allowed
446                                         $user->homenode($call);
447                                         $user->node($call);
448                                 }
449                                 $user->lastin($main::systime) unless DXChannel->get($call);
450                                 $user->put;
451                         }
452                         
453                         return if $newline eq "PC19^";
454
455                         # add hop count 
456                         $newline .=  get_hops(19) . "^";
457                         $line = $newline;
458                         last SWITCH;
459                 }
460                 
461                 if ($pcno == 20) {              # send local configuration
462                         $self->send_local_config();
463                         $self->send(pc22());
464                         $self->state('normal');
465                         return;
466                 }
467                 
468                 if ($pcno == 21) {              # delete a cluster from the list
469                         my $call = uc $field[1];
470                         if ($call ne $main::mycall) { # don't allow malicious buggers to disconnect me!
471                                 my $node = DXCluster->get_exact($call);
472                                 if ($node) {
473                                         if ($node->dxchan != $self) {
474                                                 dbg('chan', "LOOP: $call come in on wrong channel");
475                                                 return;
476                                         }
477                                         my $dxchan;
478                                         if (($dxchan = DXChannel->get($call)) && $dxchan != $self) {
479                                                 dbg('chan', "LOOP: $call connected locally");
480                                                 return;
481                                         }
482                                         $node->del();
483                                 } else {
484                                         dbg('chan', "$call not in table, dropped");
485                                         return;
486                                 }
487                         }
488                         last SWITCH;
489                 }
490                 
491                 if ($pcno == 22) {
492                         $self->state('normal');
493                         return;
494                 }
495                                 
496                 if ($pcno == 23 || $pcno == 27) { # WWV info
497                         
498                         # route 'foreign' pc27s 
499                         if ($pcno == 27) {
500                                 if ($field[8] ne $main::mycall) {
501                                         route($field[8], $line);
502                                         return;
503                                 }
504                         }
505
506                         # do some de-duping
507                         my $d = cltounix($field[1], sprintf("%02d18Z", $field[2]));
508                         my $sfi = unpad($field[3]);
509                         my $k = unpad($field[4]);
510                         my $i = unpad($field[5]);
511                         my ($r) = $field[6] =~ /R=(\d+)/;
512                         $r = 0 unless $r;
513                         my $dupkey = "$d.$sfi$k$i";
514                         if ($wwvdup{$dupkey}) {
515                                 dbg('chan', "Dup WWV Spot ignored\n");
516                                 return;
517                         }
518                         if (($pcno == 23 && $d < $main::systime - $pc23_max_age) || $d > $main::systime + 900 || $field[2] < 0 || $field[2] > 23) {
519                                 dbg('chan', "WWV Date ($field[1] $field[2]) out of range");
520                                 return;
521                         }
522                         $wwvdup{$dupkey} = $d;
523                         $field[6] =~ s/-\d+$//o;            # remove spotter's ssid
524                 
525                         my $wwv = Geomag::update($d, $field[2], $sfi, $k, $i, @field[6..8], $r);
526
527                         my $rep;
528                         eval {
529                                 $rep = Local::wwv($self, $field[1], $field[2], $sfi, $k, $i, @field[6..8], $r);
530                         };
531 #                       dbg('local', "Local::wwv2 error $@") if $@;
532                         return if $rep;
533
534                         # DON'T be silly and send on PC27s!
535                         return if $pcno == 27;
536
537                         # broadcast to the eager world
538                         send_wwv_spot($self, $line, $d, $field[2], $sfi, $k, $i, @field[6..8]);
539                         return;
540                 }
541                 
542                 if ($pcno == 24) {              # set here status
543                         my $call = uc $field[1];
544                         my $ref = DXCluster->get_exact($call);
545                         $ref->here($field[2]) if $ref;
546                         last SWITCH;
547                 }
548                 
549                 if ($pcno == 25) {      # merge request
550                         if ($field[1] ne $main::mycall) {
551                                 route($field[1], $line);
552                                 return;
553                         }
554                         if ($field[2] eq $main::mycall) {
555                                 dbg('chan', "Trying to merge to myself, ignored");
556                                 return;
557                         }
558
559                         Log('DXProt', "Merge request for $field[3] spots and $field[4] WWV from $field[1]");
560                         
561                         # spots
562                         if ($field[3] > 0) {
563                                 my @in = reverse Spot::search(1, undef, undef, 0, $field[3]);
564                                 my $in;
565                                 foreach $in (@in) {
566                                         $self->send(pc26(@{$in}[0..4], $field[2]));
567                                 }
568                         }
569
570                         # wwv
571                         if ($field[4] > 0) {
572                                 my @in = reverse Geomag::search(0, $field[4], time, 1);
573                                 my $in;
574                                 foreach $in (@in) {
575                                         $self->send(pc27(@{$in}[0..5], $field[2]));
576                                 }
577                         }
578                         return;
579                 }
580
581                 if (($pcno >= 28 && $pcno <= 33) || $pcno == 40 || $pcno == 42 || $pcno == 49) { # mail/file handling
582                         if ($pcno == 49 || $field[1] eq $main::mycall) {
583                                 DXMsg::process($self, $line);
584                         } else {
585                                 route($field[1], $line);
586                         }
587                         return;
588                 }
589                 
590                 if ($pcno == 34 || $pcno == 36) { # remote commands (incoming)
591                         if ($field[1] eq $main::mycall) {
592                                 my $ref = DXUser->get_current($field[2]);
593                                 my $cref = DXCluster->get($field[2]);
594                                 Log('rcmd', 'in', $ref->{priv}, $field[2], $field[3]);
595                                 unless ($field[3] =~ /rcmd/i || !$cref || !$ref || $cref->mynode->call ne $ref->homenode) {    # not allowed to relay RCMDS!
596                                         if ($ref->{priv}) {     # you have to have SOME privilege, the commands have further filtering
597                                                 $self->{remotecmd} = 1; # for the benefit of any command that needs to know
598                                                 my $oldpriv = $self->{priv};
599                                                 $self->{priv} = $ref->{priv};     # assume the user's privilege level
600                                                 my @in = (DXCommandmode::run_cmd($self, $field[3]));
601                                                 $self->{priv} = $oldpriv;
602                                                 for (@in) {
603                                                         s/\s*$//og;
604                                                         $self->send(pc35($main::mycall, $field[2], "$main::mycall:$_"));
605                                                         Log('rcmd', 'out', $field[2], $_);
606                                                 }
607                                                 delete $self->{remotecmd};
608                                         } else {
609                                                 $self->send(pc35($main::mycall, $field[2], "$main::mycall:sorry...!"));
610                                         }
611                                 } else {
612                                         $self->send(pc35($main::mycall, $field[2], "$main::mycall:your attempt is logged, Tut tut tut...!"));
613                                 }
614                         } else {
615                                 route($field[1], $line);
616                         }
617                         return;
618                 }
619                 
620                 if ($pcno == 35) {              # remote command replies
621                         if ($field[1] eq $main::mycall) {
622                                 my $s = $rcmds{$field[2]};
623                                 if ($s) {
624                                         my $dxchan = DXChannel->get($s->{call});
625                                         $dxchan->send($field[3]) if $dxchan;
626                                         delete $rcmds{$field[2]} if !$dxchan;
627                                 }
628                         } else {
629                                 route($field[1], $line);
630                         }
631                         return;
632                 }
633                 
634                 # for pc 37 see 44 onwards
635
636                 if ($pcno == 38) {              # node connected list from neighbour
637                         return;
638                 }
639                 
640                 if ($pcno == 39) {              # incoming disconnect
641                         $self->disconnect();
642                         return;
643                 }
644                 
645                 if ($pcno == 41) {              # user info
646                         # add this station to the user database, if required
647                         my $user = DXUser->get_current($field[1]);
648                         if (!$user) {
649                                 # then try without an SSID
650                                 $field[1] =~ s/-\d+$//o;
651                                 $user = DXUser->get_current($field[1]);
652                         }
653                         $user = DXUser->new($field[1]) if !$user;
654                         
655                         if ($field[2] == 1) {
656                                 $user->name($field[3]);
657                         } elsif ($field[2] == 2) {
658                                 $user->qth($field[3]);
659                         } elsif ($field[2] == 3) {
660                                 my ($lat, $long) = DXBearing::stoll($field[3]);
661                                 $user->lat($lat);
662                                 $user->long($long);
663                         } elsif ($field[2] == 4) {
664                                 $user->homenode($field[3]);
665                         }
666                         $user->put;
667                         last SWITCH;
668                 }
669                 if ($pcno == 43) {
670                         last SWITCH;
671                 }
672                 if ($pcno == 37 || $pcno == 44 || $pcno == 45 || $pcno == 46 || $pcno == 47) {
673                         if ($field[1] eq $main::mycall) {
674                                 ;
675                         } else {
676                                 route($field[1], $line);
677                         }
678                         return;
679                 }
680                 
681                 if ($pcno == 50) {              # keep alive/user list
682                         my $node = DXCluster->get_exact($field[1]);
683                         if ($node) {
684                                 return unless $node->isa('DXNode');
685                                 return unless $node->dxchan == $self;
686                                 $node->update_users($field[2]);
687                         }
688                         last SWITCH;
689                 }
690                 
691                 if ($pcno == 51) {              # incoming ping requests/answers
692                         
693                         # is it for us?
694                         if ($field[1] eq $main::mycall) {
695                                 my $flag = $field[3];
696                                 if ($flag == 1) {
697                                         $self->send(pc51($field[2], $field[1], '0'));
698                                 } else {
699                                         # it's a reply, look in the ping list for this one
700                                         my $ref = $pings{$field[2]};
701                                         if ($ref) {
702                                                 my $r = shift @$ref;
703                                                 my $dxchan = DXChannel->get($r->{call});
704                                                 $dxchan->send($dxchan->msg('pingi', $field[2], atime($main::systime), $main::systime - $r->{t})) if $dxchan;
705                                         }
706                                 }
707                                 
708                         } else {
709                                 # route down an appropriate thingy
710                                 route($field[1], $line);
711                         }
712                         return;
713                 }
714         }
715          
716          # if get here then rebroadcast the thing with its Hop count decremented (if
717          # there is one). If it has a hop count and it decrements to zero then don't
718          # rebroadcast it.
719          #
720          # NOTE - don't arrive here UNLESS YOU WANT this lump of protocol to be
721          #        REBROADCAST!!!!
722          #
723          
724         if (!$self->{isolate}) {
725                 broadcast_ak1a($line, $self); # send it to everyone but me
726         }
727 }
728
729 #
730 # This is called from inside the main cluster processing loop and is used
731 # for despatching commands that are doing some long processing job
732 #
733 sub process
734 {
735         my $t = time;
736         my @dxchan = DXChannel->get_all();
737         my $dxchan;
738         
739         foreach $dxchan (@dxchan) {
740                 next unless $dxchan->is_ak1a();
741                 next if $dxchan == $me;
742                 
743                 # send a pc50 out on this channel
744                 if ($t >= $dxchan->pc50_t + $DXProt::pc50_interval) {
745                         $dxchan->send(pc50());
746                         $dxchan->pc50_t($t);
747                 }
748         }
749         
750         my $key;
751         my $val;
752         my $cutoff;
753         if ($main::systime - 3600 > $last_hour) {
754                 $cutoff  = $main::systime - $pc11_dup_age;
755                 while (($key, $val) = each %spotdup) {
756                         delete $spotdup{$key} if $val < $cutoff;
757                 }
758                 $cutoff = $main::systime - $pc23_dup_age;
759                 while (($key, $val) = each %wwvdup) {
760                         delete $wwvdup{$key} if $val < $cutoff;
761                 }
762                 $cutoff = $main::systime - $pc12_dup_age;
763                 while (($key, $val) = each %anndup) {
764                         delete $anndup{$key} if $val < $cutoff;
765                 }
766                 $last_hour = $main::systime;
767         }
768 }
769
770 #
771 # finish up a pc context
772 #
773 sub finish
774 {
775         my $self = shift;
776         my $call = $self->call;
777         my $ref = DXCluster->get_exact($call);
778         
779         # unbusy and stop and outgoing mail
780         my $mref = DXMsg::get_busy($call);
781         $mref->stop_msg($call) if $mref;
782         
783         # broadcast to all other nodes that all the nodes connected to via me are gone
784         my @gonenodes = map { $_->dxchan == $self ? $_ : () } DXNode::get_all();
785         my $node;
786         
787         foreach $node (@gonenodes) {
788                 next if $node->call eq $call;
789                 broadcast_ak1a(pc21($node->call, 'Gone') , $self) unless $self->{isolate}; 
790                 $node->del();
791         }
792
793         # remove outstanding pings
794         delete $pings{$call};
795         
796         # now broadcast to all other ak1a nodes that I have gone
797         broadcast_ak1a(pc21($call, 'Gone.'), $self) unless $self->{isolate};
798         
799         Log('DXProt', $call . " Disconnected");
800         $ref->del() if $ref;
801 }
802
803 #
804 # some active measures
805 #
806 sub send_dx_spot
807 {
808         my $self = shift;
809         my $line = shift;
810         my @dxchan = DXChannel->get_all();
811         my $dxchan;
812         
813         # send it if it isn't the except list and isn't isolated and still has a hop count
814         # taking into account filtering and so on
815         foreach $dxchan (@dxchan) {
816                 my $routeit;
817                 my ($filter, $hops);
818
819                 if ($dxchan->{spotfilter}) {
820                     ($filter, $hops) = Filter::it($dxchan->{spotfilter}, @_, $self->{call} );
821                         next unless $filter;
822                 }
823                 
824                 if ($dxchan->is_ak1a) {
825                         next if $dxchan == $self;
826                         if ($hops) {
827                                 $routeit = $line;
828                                 $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
829                         } else {
830                                 $routeit = adjust_hops($dxchan, $line);  # adjust its hop count by node name
831                                 next unless $routeit;
832                         }
833                         if ($filter) {
834                                 $dxchan->send($routeit) if $routeit;
835                         } else {
836                                 $dxchan->send($routeit) unless $dxchan->{isolate} || $self->{isolate};
837                         }
838                 } elsif ($dxchan->is_user && $dxchan->{dx}) {
839                         my $buf = Spot::formatb($_[0], $_[1], $_[2], $_[3], $_[4]);
840                         $buf .= "\a\a" if $dxchan->{beep};
841                         if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
842                                 $dxchan->send($buf);
843                         } else {
844                                 $dxchan->delay($buf);
845                         }
846                 }                                       
847         }
848 }
849
850 sub send_wwv_spot
851 {
852         my $self = shift;
853         my $line = shift;
854         my @dxchan = DXChannel->get_all();
855         my $dxchan;
856         
857         # send it if it isn't the except list and isn't isolated and still has a hop count
858         # taking into account filtering and so on
859         foreach $dxchan (@dxchan) {
860                 my $routeit;
861                 my ($filter, $hops);
862
863                 if ($dxchan->{spotfilter}) {
864                          ($filter, $hops) = Filter::it($dxchan->{wwvfilter}, @_, $self->{call} );
865                          next unless $filter;
866                 }
867                 if ($dxchan->is_ak1a) {
868                         next if $dxchan == $self;
869                         if ($hops) {
870                                 $routeit = $line;
871                                 $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
872                         } else {
873                                 $routeit = adjust_hops($dxchan, $line);  # adjust its hop count by node name
874                                 next unless $routeit;
875                         }
876                         if ($filter) {
877                                 $dxchan->send($routeit) if $routeit;
878                         } else {
879                                 $dxchan->send($routeit) unless $dxchan->{isolate} || $self->{isolate};
880                                 
881                         }
882                 } elsif ($dxchan->is_user && $dxchan->{wwv}) {
883                         my $buf = "WWV de $_[6] <$_[1]>:   SFI=$_[2], A=$_[3], K=$_[4], $_[5]";
884                         $buf .= "\a\a" if $dxchan->{beep};
885                         if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
886                                 $dxchan->send($buf);
887                         } else {
888                                 $dxchan->delay($buf);
889                         }
890                 }                                       
891         }
892 }
893
894 # send an announce
895 sub send_announce
896 {
897         my $self = shift;
898         my $line = shift;
899         my @dxchan = DXChannel->get_all();
900         my $dxchan;
901         my $text = unpad($_[2]);
902         my $target;
903         my $to = 'To ';
904                                 
905         if ($_[3] eq '*') {     # sysops
906                 $target = "SYSOP";
907         } elsif ($_[3] gt ' ') { # speciality list handling
908                 my ($name) = split /\./, $_[3]; 
909                 $target = "$name"; # put the rest in later (if bothered) 
910         } 
911         
912         if ($_[5] eq '1') {
913                 $target = "WX"; 
914                 $to = '';
915         }
916         $target = "All" if !$target;
917         
918         Log('ann', $target, $_[0], $text);
919
920         # send it if it isn't the except list and isn't isolated and still has a hop count
921         # taking into account filtering and so on
922         foreach $dxchan (@dxchan) {
923                 my $routeit;
924                 my ($filter, $hops);
925
926                 if ($dxchan->{annfilter}) {
927                         ($filter, $hops) = Filter::it($dxchan->{annfilter}, @_, $self->{call} );
928                         next unless $filter;
929                 } 
930                 if ($dxchan->is_ak1a && $_[1] ne $main::mycall) {  # i.e not specifically routed to me
931                         next if $dxchan == $self;
932                         if ($hops) {
933                                 $routeit = $line;
934                                 $routeit =~ s/\^H\d+\^\~$/\^H$hops\^\~/;
935                         } else {
936                                 $routeit = adjust_hops($dxchan, $line);  # adjust its hop count by node name
937                                 next unless $routeit;
938                         }
939                         if ($filter) {
940                                 $dxchan->send($routeit) if $routeit;
941                         } else {
942                                 $dxchan->send($routeit) unless $dxchan->{isolate} || $self->{isolate};
943                                 
944                         }
945                 } elsif ($dxchan->is_user && $dxchan->{ann}) {
946                         next if $target eq 'SYSOP' && $dxchan->{priv} < 5;
947                         my $buf = "$to$target de $_[0]: $text";
948                         $buf .= "\a\a" if $dxchan->{beep};
949                         if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
950                                 $dxchan->send($buf);
951                         } else {
952                                 $dxchan->delay($buf);
953                         }
954                 }                                       
955         }
956 }
957
958 sub send_local_config
959 {
960         my $self = shift;
961         my $n;
962         my @nodes;
963         my @localnodes;
964         my @remotenodes;
965                 
966         # send our nodes
967         if ($self->{isolate}) {
968                 @localnodes = (DXCluster->get_exact($main::mycall));
969         } else {
970                 # create a list of all the nodes that are not connected to this connection
971                 # and are not themselves isolated, this to make sure that isolated nodes
972         # don't appear outside of this node
973                 @nodes = DXNode::get_all();
974                 @nodes = grep { $_->{call} ne $main::mycall } @nodes;
975                 @nodes = grep { $_->dxchan != $self } @nodes if @nodes;
976                 @nodes = grep { !$_->dxchan->{isolate} } @nodes if @nodes;
977                 @localnodes = grep { $_->dxchan->{call} eq $_->{call} } @nodes if @nodes;
978                 unshift @localnodes, DXCluster->get_exact($main::mycall);
979                 @remotenodes = grep { $_->dxchan->{call} ne $_->{call} } @nodes if @nodes;
980         }
981
982         my @s = $me->pc19(@localnodes, @remotenodes);
983         for (@s) {
984                 my $routeit = adjust_hops($self, $_);
985                 $self->send($routeit) if $routeit;
986         }
987         
988         # get all the users connected on the above nodes and send them out
989         foreach $n (@localnodes, @remotenodes) {
990                 my @users = values %{$n->list};
991                 my @s = pc16($n, @users);
992                 for (@s) {
993                         my $routeit = adjust_hops($self, $_);
994                         $self->send($routeit) if $routeit;
995                 }
996         }
997 }
998
999 #
1000 # route a message down an appropriate interface for a callsign
1001 #
1002 # is called route(to, pcline);
1003 #
1004 sub route
1005 {
1006         my ($call, $line) = @_;
1007         my $cl = DXCluster->get_exact($call);
1008         if ($cl) {
1009                 my $hops;
1010                 my $dxchan = $cl->{dxchan};
1011                 if ($dxchan) {
1012                         my $routeit = adjust_hops($dxchan, $line);   # adjust its hop count by node name
1013                         if ($routeit) {
1014                                 $dxchan->send($routeit) if $dxchan;
1015                         }
1016                 }
1017         }
1018 }
1019
1020 # broadcast a message to all clusters taking into account isolation
1021 # [except those mentioned after buffer]
1022 sub broadcast_ak1a
1023 {
1024         my $s = shift;                          # the line to be rebroadcast
1025         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
1026         my @dxchan = get_all_ak1a();
1027         my $dxchan;
1028         
1029         # send it if it isn't the except list and isn't isolated and still has a hop count
1030         foreach $dxchan (@dxchan) {
1031                 next if grep $dxchan == $_, @except;
1032                 my $routeit = adjust_hops($dxchan, $s);      # adjust its hop count by node name
1033                 $dxchan->send($routeit) unless $dxchan->{isolate} || !$routeit;
1034         }
1035 }
1036
1037 # broadcast a message to all clusters ignoring isolation
1038 # [except those mentioned after buffer]
1039 sub broadcast_all_ak1a
1040 {
1041         my $s = shift;                          # the line to be rebroadcast
1042         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
1043         my @dxchan = get_all_ak1a();
1044         my $dxchan;
1045         
1046         # send it if it isn't the except list and isn't isolated and still has a hop count
1047         foreach $dxchan (@dxchan) {
1048                 next if grep $dxchan == $_, @except;
1049                 my $routeit = adjust_hops($dxchan, $s);      # adjust its hop count by node name
1050                 $dxchan->send($routeit);
1051         }
1052 }
1053
1054 # broadcast to all users
1055 # storing the spot or whatever until it is in a state to receive it
1056 sub broadcast_users
1057 {
1058         my $s = shift;                          # the line to be rebroadcast
1059         my $sort = shift;           # the type of transmission
1060         my $fref = shift;           # a reference to an object to filter on
1061         my @except = @_;                        # to all channels EXCEPT these (dxchannel refs)
1062         my @dxchan = get_all_users();
1063         my $dxchan;
1064         my @out;
1065         
1066         foreach $dxchan (@dxchan) {
1067                 next if grep $dxchan == $_, @except;
1068                 push @out, $dxchan;
1069         }
1070         broadcast_list($s, $sort, $fref, @out);
1071 }
1072
1073 # broadcast to a list of users
1074 sub broadcast_list
1075 {
1076         my $s = shift;
1077         my $sort = shift;
1078         my $fref = shift;
1079         my $dxchan;
1080         
1081         foreach $dxchan (@_) {
1082                 my $filter = 1;
1083                 
1084                 if ($sort eq 'dx') {
1085                     next unless $dxchan->{dx};
1086                         ($filter) = Filter::it($dxchan->{spotfilter}, @{$fref}) if ref $fref;
1087                         next unless $filter;
1088                 }
1089                 next if $sort eq 'ann' && !$dxchan->{ann};
1090                 next if $sort eq 'wwv' && !$dxchan->{wwv};
1091                 next if $sort eq 'wx' && !$dxchan->{wx};
1092
1093                 $s =~ s/\a//og unless $dxchan->{beep};
1094
1095                 if ($dxchan->{state} eq 'prompt' || $dxchan->{state} eq 'convers') {
1096                         $dxchan->send($s);      
1097                 } else {
1098                         $dxchan->delay($s);
1099                 }
1100         }
1101 }
1102
1103 #
1104 # gimme all the ak1a nodes
1105 #
1106 sub get_all_ak1a
1107 {
1108         my @list = DXChannel->get_all();
1109         my $ref;
1110         my @out;
1111         foreach $ref (@list) {
1112                 push @out, $ref if $ref->is_ak1a;
1113         }
1114         return @out;
1115 }
1116
1117 # return a list of all users
1118 sub get_all_users
1119 {
1120         my @list = DXChannel->get_all();
1121         my $ref;
1122         my @out;
1123         foreach $ref (@list) {
1124                 push @out, $ref if $ref->is_user;
1125         }
1126         return @out;
1127 }
1128
1129 # return a list of all user callsigns
1130 sub get_all_user_calls
1131 {
1132         my @list = DXChannel->get_all();
1133         my $ref;
1134         my @out;
1135         foreach $ref (@list) {
1136                 push @out, $ref->call if $ref->is_user;
1137         }
1138         return @out;
1139 }
1140
1141 #
1142 # obtain the hops from the list for this callsign and pc no 
1143 #
1144
1145 sub get_hops
1146 {
1147         my $pcno = shift;
1148         my $hops = $DXProt::hopcount{$pcno};
1149         $hops = $DXProt::def_hopcount if !$hops;
1150         return "H$hops";       
1151 }
1152
1153
1154 # adjust the hop count on a per node basis using the user loadable 
1155 # hop table if available or else decrement an existing one
1156 #
1157
1158 sub adjust_hops
1159 {
1160         my $self = shift;
1161         my $s = shift;
1162         my $call = $self->{call};
1163         my $hops;
1164         
1165         if (($hops) = $s =~ /\^H(\d+)\^~?$/o) {
1166                 my ($pcno) = $s =~ /^PC(\d\d)/o;
1167                 confess "$call called adjust_hops with '$s'" unless $pcno;
1168                 my $ref = $nodehops{$call} if %nodehops;
1169                 if ($ref) {
1170                         my $newhops = $ref->{$pcno};
1171                         return "" if defined $newhops && $newhops == 0;
1172                         $newhops = $ref->{default} unless $newhops;
1173                         return "" if defined $newhops && $newhops == 0;
1174                         $newhops = $hops if !$newhops;
1175                         $s =~ s/\^H(\d+)(\^~?)$/\^H$newhops$2/ if $newhops;
1176                 } else {
1177                         # simply decrement it
1178                         $hops--;
1179                         return "" if !$hops;
1180                         $s =~ s/\^H(\d+)(\^~?)$/\^H$hops$2/ if $hops;
1181                 }
1182         }
1183         return $s;
1184 }
1185
1186
1187 # load hop tables
1188 #
1189 sub load_hops
1190 {
1191         my $self = shift;
1192         return $self->msg('lh1') unless -e "$main::data/hop_table.pl";
1193         do "$main::data/hop_table.pl";
1194         return $@ if $@;
1195         return 0;
1196 }
1197
1198 # remove leading and trailing spaces from an input string
1199 sub unpad
1200 {
1201         my $s = shift;
1202         $s =~ s/^\s+|\s+$//;
1203         return $s;
1204 }
1205
1206 # add a ping request to the ping queues
1207 sub addping
1208 {
1209         my ($from, $to) = @_;
1210         my $ref = $pings{$to};
1211         $ref = $pings{$to} = [] if !$ref;
1212         my $r = {};
1213         $r->{call} = $from;
1214         $r->{t} = $main::systime;
1215         route($to, pc51($to, $main::mycall, 1));
1216         push @$ref, $r;
1217 }
1218
1219 # add a rcmd request to the rcmd queues
1220 sub addrcmd
1221 {
1222         my ($from, $to, $cmd) = @_;
1223         my $r = {};
1224         $r->{call} = $from;
1225         $r->{t} = $main::systime;
1226         $r->{cmd} = $cmd;
1227         route($to, pc34($main::mycall, $to, $cmd));
1228         $rcmds{$to} = $r;
1229 }
1230 1;
1231 __END__