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1 #!/usr/bin/perl
2 #
3 # This module impliments the user facing command mode for a dx cluster
4 #
5 # Copyright (c) 1998 Dirk Koopman G1TLH
6 #
7 # $Id$
8
9
10 package DXCommandmode;
11
12 use POSIX;
13
14 @ISA = qw(DXChannel);
15
16 use DXUtil;
17 use DXChannel;
18 use DXUser;
19 use DXVars;
20 use DXDebug;
21 use DXM;
22 use DXLog;
23 use DXLogPrint;
24 use DXBearing;
25 use CmdAlias;
26 use Filter;
27 use Minimuf;
28 use DXDb;
29 use AnnTalk;
30 use WCY;
31 use Sun;
32 use Internet;
33 use Script;
34 use Net::Telnet;
35 use QSL;
36 use DB_File;
37 use VE7CC;
38 use Thingy;
39 use Thingy::Dx;
40 use Thingy::Hello;
41 use Thingy::Bye;
42
43 use strict;
44 use vars qw(%Cache %cmd_cache $errstr %aliases $scriptbase $maxerrors %nothereslug $maxbadcount $msgpolltime);
45
46 %Cache = ();                                    # cache of dynamically loaded routine's mod times
47 %cmd_cache = ();                                # cache of short names
48 $errstr = ();                                   # error string from eval
49 %aliases = ();                                  # aliases for (parts of) commands
50 $scriptbase = "$main::root/scripts"; # the place where all users start scripts go
51 $maxerrors = 20;                                # the maximum number of concurrent errors allowed before disconnection
52 $maxbadcount = 3;                               # no of bad words allowed before disconnection
53 $msgpolltime = 3600;                    # the time between polls for new messages 
54
55
56 use vars qw($VERSION $BRANCH);
57
58 main::mkver($VERSION = q$Revision$);
59
60 #
61 # obtain a new connection this is derived from dxchannel
62 #
63
64 sub new 
65 {
66         my $self = DXChannel::alloc(@_);
67
68         # routing, this must go out here to prevent race condx
69         my $pkg = shift;
70         my $call = shift;
71         my @rout = $main::routeroot->add_user($call, 1);
72
73         
74         my $ref = Route::User::get($call);
75         $main::me->route_pc16($main::mycall, undef, $main::routeroot, $ref) if $ref;
76         return $self;
77 }
78
79 # this is how a a connection starts, you get a hello message and the motd with
80 # possibly some other messages asking you to set various things up if you are
81 # new (or nearly new and slacking) user.
82
83 sub start
84
85         my ($self, $line, $sort) = @_;
86         my $user = $self->{user};
87         my $call = $self->{call};
88         my $name = $user->{name};
89         
90         # log it
91         my $host = $self->{conn}->{peerhost} || "unknown";
92         Log('DXCommand', "$call connected from $host");
93
94         $self->{name} = $name ? $name : $call;
95         $self->send($self->msg('l2',$self->{name}));
96         $self->state('prompt');         # a bit of room for further expansion, passwords etc
97         $self->{priv} = $user->priv || 0;
98         $self->{lang} = $user->lang || $main::lang || 'en';
99         $self->{pagelth} = $user->pagelth || 20;
100         ($self->{width}) = $line =~ /width=(\d+)/; $line =~ s/\s*width=\d+\s*//;
101         $self->{width} = 80 unless $self->{width} && $self->{width} > 80;
102         $self->{consort} = $line;       # save the connection type
103         
104         # set some necessary flags on the user if they are connecting
105         $self->{beep} = $user->wantbeep;
106         $self->{ann} = $user->wantann;
107         $self->{wwv} = $user->wantwwv;
108         $self->{wcy} = $user->wantwcy;
109         $self->{talk} = $user->wanttalk;
110         $self->{wx} = $user->wantwx;
111         $self->{dx} = $user->wantdx;
112         $self->{logininfo} = $user->wantlogininfo;
113         $self->{ann_talk} = $user->wantann_talk;
114         $self->{here} = 1;
115         $self->{prompt} = $user->prompt if $user->prompt;
116
117         # sort out new dx spot stuff
118         $user->wantdxcq(0) unless defined $user->{wantdxcq};
119         $user->wantdxitu(0) unless defined $user->{wantdxitu};  
120         $user->wantusstate(0) unless defined $user->{wantusstate};
121
122         # sort out registration
123         if ($main::reqreg == 1) {
124                 $self->{registered} = $user->registered;
125         } elsif ($main::reqreg == 2) {
126                 $self->{registered} = !$user->registered;
127         } else {
128                 $self->{registered} = 1;
129         }
130
131
132         # decide which motd to send
133         my $motd;
134         unless ($self->{registered}) {
135                 $motd = "${main::motd}_nor_$self->{lang}";
136                 $motd = "${main::motd}_nor" unless -e $motd;
137         }
138         $motd = "${main::motd}_$self->{lang}" unless $motd && -e $motd;
139         $motd = $main::motd unless $motd && -e $motd;
140         $self->send_file($motd) if -e $motd;
141
142         # sort out privilege reduction
143         $self->{priv} = 0 if $line =~ /^(ax|te)/ && !$self->conn->{usedpasswd};
144
145         # get the filters
146         $self->{spotsfilter} = Filter::read_in('spots', $call, 0) || Filter::read_in('spots', 'user_default', 0);
147         $self->{wwvfilter} = Filter::read_in('wwv', $call, 0) || Filter::read_in('wwv', 'user_default', 0);
148         $self->{wcyfilter} = Filter::read_in('wcy', $call, 0) || Filter::read_in('wcy', 'user_default', 0);
149         $self->{annfilter} = Filter::read_in('ann', $call, 0) || Filter::read_in('ann', 'user_default', 0) ;
150
151         # clean up qra locators
152         my $qra = $user->qra;
153         $qra = undef if ($qra && !DXBearing::is_qra($qra));
154         unless ($qra) {
155                 my $lat = $user->lat;
156                 my $long = $user->long;
157                 $user->qra(DXBearing::lltoqra($lat, $long)) if (defined $lat && defined $long);  
158         }
159
160         # decide on echo
161         my $echo = $user->wantecho;
162         unless ($echo) {
163                 $self->send_now('E', "0");
164                 $self->send($self->msg('echow'));
165                 $self->conn->echo($echo) if $self->conn->can('echo');
166         }
167         
168         $self->tell_login('loginu');
169         
170         # do we need to send a forward/opernam?
171         my $lastoper = $user->lastoper || 0;
172         my $homenode = $user->homenode || ""; 
173         if ($homenode eq $main::mycall && $main::systime >= $lastoper + $DXUser::lastoperinterval) {
174                 run_cmd($main::me, "forward/opernam $call");
175                 $user->lastoper($main::systime + ((int rand(10)) * 86400));
176         }
177
178         # ALWAYS output the user
179         my $thing = Thingy::Hello->new(user => $call, h => $self->{here});
180         $thing->broadcast($self);
181         $self->lasthello($main::systime);
182
183         # run a script send the output to the punter
184         my $script = new Script(lc $call) || new Script('user_default');
185         $script->run($self) if $script;
186
187         # send cluster info
188         my $info = Route::cluster();
189         $self->send("Cluster:$info");
190
191         # send prompts and things
192         $self->send($self->msg('namee1')) if !$user->name;
193         $self->send($self->msg('qthe1')) if !$user->qth;
194         $self->send($self->msg('qll')) if !$user->qra || (!$user->lat && !$user->long);
195         $self->send($self->msg('hnodee1')) if !$user->qth;
196         $self->send($self->msg('m9')) if DXMsg::for_me($call);
197         $self->lastmsgpoll($main::systime);
198         $self->prompt;
199 }
200
201 #
202 # This is the normal command prompt driver
203 #
204
205 sub normal
206 {
207         my $self = shift;
208         my $cmdline = shift;
209         my @ans;
210
211         # save this for them's that need it
212         my $rawline = $cmdline;
213         
214         # remove leading and trailing spaces
215         $cmdline =~ s/^\s*(.*)\s*$/$1/;
216         
217         if ($self->{state} eq 'page') {
218                 my $i = $self->{pagelth};
219                 my $ref = $self->{pagedata};
220                 my $tot = @$ref;
221                 
222                 # abort if we get a line starting in with a
223                 if ($cmdline =~ /^a/io) {
224                         undef $ref;
225                         $i = 0;
226                 }
227         
228                 # send a tranche of data
229                 while ($i-- > 0 && @$ref) {
230                         my $line = shift @$ref;
231                         $line =~ s/\s+$//o;     # why am having to do this? 
232                         $self->send($line);
233                 }
234                 
235                 # reset state if none or else chuck out an intermediate prompt
236                 if ($ref && @$ref) {
237                         $tot -= $self->{pagelth};
238                         $self->send($self->msg('page', $tot));
239                 } else {
240                         $self->state('prompt');
241                 }
242         } elsif ($self->{state} eq 'sysop') {
243                 my $passwd = $self->{user}->passwd;
244                 if ($passwd) {
245                         my @pw = grep {$_ !~ /\s/} split //, $passwd;
246                         my @l = @{$self->{passwd}};
247                         my $str = "$pw[$l[0]].*$pw[$l[1]].*$pw[$l[2]].*$pw[$l[3]].*$pw[$l[4]]";
248                         if ($cmdline =~ /$str/) {
249                                 $self->{priv} = $self->{user}->priv;
250                         } else {
251                                 $self->send($self->msg('sorry'));
252                         }
253                 } else {
254                         $self->send($self->msg('sorry'));
255                 }
256                 $self->state('prompt');
257         } elsif ($self->{state} eq 'passwd') {
258                 my $passwd = $self->{user}->passwd;
259                 if ($passwd && $cmdline eq $passwd) {
260                         $self->send($self->msg('pw1'));
261                         $self->state('passwd1');
262                 } else {
263                         $self->conn->{echo} = $self->conn->{decho};
264                         delete $self->conn->{decho};
265                         $self->send($self->msg('sorry'));
266                         $self->state('prompt');
267                 }
268         } elsif ($self->{state} eq 'passwd1') {
269                 $self->{passwd} = $cmdline;
270                 $self->send($self->msg('pw2'));
271                 $self->state('passwd2');
272         } elsif ($self->{state} eq 'passwd2') {
273                 if ($cmdline eq $self->{passwd}) {
274                         $self->{user}->passwd($cmdline);
275                         $self->send($self->msg('pw3'));
276                 } else {
277                         $self->send($self->msg('pw4'));
278                 }
279                 $self->conn->{echo} = $self->conn->{decho};
280                 delete $self->conn->{decho};
281                 $self->state('prompt');
282         } elsif ($self->{state} eq 'talk') {
283                 if ($cmdline =~ m{^(?:/EX|/ABORT)}i) {
284                         for (@{$self->{talklist}}) {
285                                 $self->send_talks($_,  $self->msg('talkend'));
286                         }
287                         $self->state('prompt');
288                         delete $self->{talklist};
289                 } elsif ($cmdline =~ m|^/+\w+|) {
290                         $cmdline =~ s|^/||;
291                         my $sendit = $cmdline =~ s|^/+||;
292                         my @in = $self->run_cmd($cmdline);
293                         $self->send_ans(@in);
294                         if ($sendit && $self->{talklist} && @{$self->{talklist}}) {
295                                 foreach my $l (@in) {
296                                         my @bad;
297                                         if (@bad = BadWords::check($l)) {
298                                                 $self->badcount(($self->badcount||0) + @bad);
299                                                 Log('DXCommand', "$self->{call} swore: $l");
300                                         } else {
301                                                 for (@{$self->{talklist}}) {
302                                                         $self->send_talks($_, $l);
303                                                 }
304                                         }
305                                 }
306                         }
307                         $self->send($self->talk_prompt);
308                 } elsif ($self->{talklist} && @{$self->{talklist}}) {
309                         # send what has been said to whoever is in this person's talk list
310                         my @bad;
311                         if (@bad = BadWords::check($cmdline)) {
312                                 $self->badcount(($self->badcount||0) + @bad);
313                                 Log('DXCommand', "$self->{call} swore: $cmdline");
314                         } else {
315                                 for (@{$self->{talklist}}) {
316                                         $self->send_talks($_, $rawline);
317                                 }
318                         }
319                         $self->send($self->talk_prompt) if $self->{state} eq 'talk';
320                 } else {
321                         # for safety
322                         $self->state('prompt');
323                 }
324         } elsif (my $func = $self->{func}) {
325                 no strict 'refs';
326                 my @ans;
327                 if (ref $self->{edit}) {
328                         eval { @ans = $self->{edit}->$func($self, $rawline)};
329                 } else {
330                         eval {  @ans = &{$self->{func}}($self, $rawline) };
331                 }
332                 if ($@) {
333                         $self->send_ans("Syserr: on stored func $self->{func}", $@);
334                         delete $self->{func};
335                         $self->state('prompt');
336                         undef $@;
337                 }
338                 $self->send_ans(@ans);
339         } else {
340                 $self->send_ans(run_cmd($self, $cmdline));
341         } 
342
343         # check for excessive swearing
344         if ($self->{badcount} && $self->{badcount} >= $maxbadcount) {
345                 Log('DXCommand', "$self->{call} logged out for excessive swearing");
346                 $self->disconnect;
347                 return;
348         }
349
350         # send a prompt only if we are in a prompt state
351         $self->prompt() if $self->{state} =~ /^prompt/o;
352 }
353
354 # send out the talk messages taking into account vias and connectivity
355 sub send_talks
356 {
357         my ($self, $ent, $line) = @_;
358         
359         my ($to, $via) = $ent =~ /(\S+)>(\S+)/;
360         $to = $ent unless $to;
361         my $call = $via ? $via : $to;
362         my $clref = Route::get($call);
363         my $dxchan = $clref->dxchan if $clref;
364         if ($dxchan) {
365                 $dxchan->talk($self->{call}, $to, $via, $line);
366         } else {
367                 $self->send($self->msg('disc2', $via ? $via : $to));
368                 my @l = grep { $_ ne $ent } @{$self->{talklist}};
369                 if (@l) {
370                         $self->{talklist} = \@l;
371                 } else {
372                         delete $self->{talklist};
373                         $self->state('prompt');
374                 }
375         }
376 }
377
378 sub talk_prompt
379 {
380         my $self = shift;
381         my @call;
382         for (@{$self->{talklist}}) {
383                 my ($to, $via) = /(\S+)>(\S+)/;
384                 $to = $_ unless $to;
385                 push @call, $to;
386         }
387         return $self->msg('talkprompt', join(',', @call));
388 }
389
390 #
391 # send a load of stuff to a command user with page prompting
392 # and stuff
393 #
394
395 sub send_ans
396 {
397         my $self = shift;
398         
399         if ($self->{pagelth} && @_ > $self->{pagelth}) {
400                 my $i;
401                 for ($i = $self->{pagelth}; $i-- > 0; ) {
402                         my $line = shift @_;
403                         $line =~ s/\s+$//o;     # why am having to do this? 
404                         $self->send($line);
405                 }
406                 $self->{pagedata} =  [ @_ ];
407                 $self->state('page');
408                 $self->send($self->msg('page', scalar @_));
409         } else {
410                 for (@_) {
411                         if (defined $_) {
412                                 $self->send($_);
413                         } else {
414                                 $self->send('');
415                         }
416                 }
417         } 
418 }
419
420 # this is the thing that runs the command, it is done like this for the 
421 # benefit of remote command execution
422 #
423
424 sub run_cmd
425 {
426         my $self = shift;
427         my $user = $self->{user};
428         my $call = $self->{call};
429         my $cmdline = shift;
430         my @ans;
431         
432
433         return () if length $cmdline == 0;
434                 
435         # split the command line up into parts, the first part is the command
436         my ($cmd, $args) = split /\s+/, $cmdline, 2;
437         $args = "" unless defined $args;
438                 
439         if ($cmd) {
440                 # strip out // on command only
441                 $cmd =~ s|//|/|g;
442                                         
443                 my ($path, $fcmd);
444                         
445                 dbg("cmd: $cmd") if isdbg('command');
446                         
447                 # alias it if possible
448                 my $acmd = CmdAlias::get_cmd($cmd);
449                 if ($acmd) {
450                         ($cmd, $args) = split /\s+/, "$acmd $args", 2;
451                         $args = "" unless defined $args;
452                         dbg("aliased cmd: $cmd $args") if isdbg('command');
453                 }
454                         
455                 # first expand out the entry to a command
456                 ($path, $fcmd) = search($main::localcmd, $cmd, "pl");
457                 ($path, $fcmd) = search($main::cmd, $cmd, "pl") if !$path || !$fcmd;
458
459                 if ($path && $cmd) {
460                         dbg("path: $cmd cmd: $fcmd") if isdbg('command');
461                         
462                         my $package = find_cmd_name($path, $fcmd);
463                         return ($@) if $@;
464                                 
465                         if ($package) {
466                                 no strict 'refs';
467                                 dbg("package: $package") if isdbg('command');
468                                 eval { @ans = &$package($self, $args) };
469                                 return (DXDebug::shortmess($@)) if $@;
470                         }
471                 } else {
472                         dbg("cmd: $cmd not found") if isdbg('command');
473                         if (++$self->{errors} > $maxerrors) {
474                                 $self->send($self->msg('e26'));
475                                 $self->disconnect;
476                                 return ();
477                         } else {
478                                 return ($self->msg('e1'));
479                         }
480                 }
481         }
482         
483         my $ok = shift @ans;
484         if ($ok) {
485                 delete $self->{errors};
486         } else {
487                 if (++$self->{errors} > $maxerrors) {
488                         $self->send($self->msg('e26'));
489                         $self->disconnect;
490                         return ();
491                 }
492         }
493         return map {s/([^\s])\s+$/$1/; $_} @ans;
494 }
495
496 #
497 # This is called from inside the main cluster processing loop and is used
498 # for despatching commands that are doing some long processing job
499 #
500 sub process
501 {
502         my $t = time;
503         my @dxchan = DXChannel::get_all();
504         my $dxchan;
505         
506         foreach $dxchan (@dxchan) {
507                 next if $dxchan->sort ne 'U';  
508         
509                 # send a outstanding message prompt if required
510                 if ($t >= $dxchan->lastmsgpoll + $msgpolltime) {
511                         $dxchan->send($dxchan->msg('m9')) if DXMsg::for_me($dxchan->call);
512                         $dxchan->lastmsgpoll($t);
513                 }
514                 
515                 # send a prompt if no activity out on this channel
516                 if ($t >= $dxchan->t + $main::user_interval) {
517                         $dxchan->prompt() if $dxchan->{state} =~ /^prompt/o;
518                         $dxchan->t($t);
519                 }
520         }
521
522         while (my ($k, $v) = each %nothereslug) {
523                 if ($main::systime >= $v + 300) {
524                         delete $nothereslug{$k};
525                 }
526         }
527 }
528
529 #
530 # finish up a user context
531 #
532 sub disconnect
533 {
534         my $self = shift;
535         my $call = $self->call;
536
537         return if $self->{disconnecting}++;
538
539         delete $self->{senddbg};
540
541         my $uref = Route::User::get($call);
542         my @rout;
543         if ($uref) {
544                 @rout = $main::routeroot->del_user($uref);
545                 dbg("B/C PC17 on $main::mycall for: $call") if isdbg('route');
546
547                 # issue a pc17 to everybody interested
548                 $main::me->route_pc17($main::mycall, undef, $main::routeroot, $uref);
549
550                 my $thing = Thingy::Bye->new(user=>$call);
551                 $thing->broadcast($self);
552         } else {
553                 confess "trying to disconnect a non existant user $call";
554         }
555
556         # I was the last node visited
557     $self->user->node($main::mycall);
558                 
559         # send info to all logged in thingies
560         $self->tell_login('logoutu');
561
562         # remove any outstanding pings I have sent
563         Thingy::Ping::forget($call);
564         
565         Log('DXCommand', "$call disconnected");
566
567         $self->SUPER::disconnect;
568 }
569
570 #
571 # short cut to output a prompt
572 #
573
574 sub prompt
575 {
576         my $self = shift;
577         my $call = $self->call;
578         my $date = cldate($main::systime);
579         my $time = ztime($main::systime);
580         my $prompt = $self->{prompt} || $self->msg('pr');
581
582         $call = "($call)" unless $self->here;
583         $prompt =~ s/\%C/$call/g;
584         $prompt =~ s/\%D/$date/g;
585         $prompt =~ s/\%T/$time/g;
586         $prompt =~ s/\%M/$main::mycall/g;
587         
588         $self->send($prompt);
589 }
590
591 # broadcast a message to all users [except those mentioned after buffer]
592 sub broadcast
593 {
594         my $pkg = shift;                        # ignored
595         my $s = shift;                          # the line to be rebroadcast
596         
597     foreach my $dxchan (DXChannel::get_all()) {
598                 next unless $dxchan->{sort} eq 'U'; # only interested in user channels  
599                 next if grep $dxchan == $_, @_;
600                 $dxchan->send($s);                      # send it
601         }
602 }
603
604 # gimme all the users
605 sub get_all
606 {
607         return grep {$_->{sort} eq 'U'} DXChannel::get_all();
608 }
609
610 # run a script for this user
611 sub run_script
612 {
613         my $self = shift;
614         my $silent = shift || 0;
615         
616 }
617
618 #
619 # search for the command in the cache of short->long form commands
620 #
621
622 sub search
623 {
624         my ($path, $short_cmd, $suffix) = @_;
625         my ($apath, $acmd);
626         
627         # commands are lower case
628         $short_cmd = lc $short_cmd;
629         dbg("command: $path $short_cmd\n") if isdbg('command');
630
631         # do some checking for funny characters
632         return () if $short_cmd =~ /\/$/;
633
634         # return immediately if we have it
635         ($apath, $acmd) = split ',', $cmd_cache{$short_cmd} if $cmd_cache{$short_cmd};
636         if ($apath && $acmd) {
637                 dbg("cached $short_cmd = ($apath, $acmd)\n") if isdbg('command');
638                 return ($apath, $acmd);
639         }
640         
641         # if not guess
642         my @parts = split '/', $short_cmd;
643         my $dirfn;
644         my $curdir = $path;
645         my $p;
646         my $i;
647         my @lparts;
648         
649         for ($i = 0; $i < @parts; $i++) {
650                 my  $p = $parts[$i];
651                 opendir(D, $curdir) or confess "can't open $curdir $!";
652                 my @ls = readdir D;
653                 closedir D;
654                 my $l;
655                 foreach $l (sort @ls) {
656                         next if $l =~ /^\./;
657                         if ($i < $#parts) {             # we are dealing with directories
658                                 if ((-d "$curdir/$l") && $p eq substr($l, 0, length $p)) {
659                                         dbg("got dir: $curdir/$l\n") if isdbg('command');
660                                         $dirfn .= "$l/";
661                                         $curdir .= "/$l";
662                                         last;
663                                 }
664                         } else {                        # we are dealing with commands
665                                 @lparts = split /\./, $l;                  
666                                 next if $lparts[$#lparts] ne $suffix;        # only look for .$suffix files
667                                 if ($p eq substr($l, 0, length $p)) {
668                                         pop @lparts; #  remove the suffix
669                                         $l = join '.', @lparts;
670                                         #                 chop $dirfn;               # remove trailing /
671                                         $dirfn = "" unless $dirfn;
672                                         $cmd_cache{$short_cmd} = join(',', ($path, "$dirfn$l")); # cache it
673                                         dbg("got path: $path cmd: $dirfn$l\n") if isdbg('command');
674                                         return ($path, "$dirfn$l"); 
675                                 }
676                         }
677                 }
678         }
679         return ();  
680 }  
681
682 # clear the command name cache
683 sub clear_cmd_cache
684 {
685         no strict 'refs';
686         
687         for (keys %Cache) {
688                 undef *{$_} unless /cmd_cache/;
689                 dbg("Undefining cmd $_") if isdbg('command');
690         }
691         %cmd_cache = ();
692         %Cache = ();
693 }
694
695 #
696 # the persistant execution of things from the command directories
697 #
698 #
699 # This allows perl programs to call functions dynamically
700
701 # This has been nicked directly from the perlembed pages
702 #
703
704 #require Devel::Symdump;  
705
706 sub valid_package_name {
707         my($string) = @_;
708         $string =~ s|([^A-Za-z0-9_/])|sprintf("_%2x",unpack("C",$1))|eg;
709         
710         $string =~ s|/|_|g;
711         return "cmd_$string";
712 }
713
714
715 # this bit of magic finds a command in the offered directory
716 sub find_cmd_name {
717         my $path = shift;
718         my $cmdname = shift;
719         my $package = valid_package_name($cmdname);
720         my $filename = "$path/$cmdname.pl";
721         my $mtime = -M $filename;
722         
723         # return if we can't find it
724         $errstr = undef;
725         unless (defined $mtime) {
726                 $errstr = DXM::msg('e1');
727                 return undef;
728         }
729         
730         if(defined $Cache{$package}->{mtime} &&$Cache{$package}->{mtime} <= $mtime) {
731                 #we have compiled this subroutine already,
732                 #it has not been updated on disk, nothing left to do
733                 #print STDERR "already compiled $package->handler\n";
734                 ;
735         } else {
736
737                 my $sub = readfilestr($filename);
738                 unless ($sub) {
739                         $errstr = "Syserr: can't open '$filename' $!";
740                         return undef;
741                 };
742                 
743                 #wrap the code into a subroutine inside our unique package
744                 my $eval = qq( sub $package { $sub } );
745                 
746                 if (isdbg('eval')) {
747                         my @list = split /\n/, $eval;
748                         my $line;
749                         for (@list) {
750                                 dbg($_ . "\n") if isdbg('eval');
751                         }
752                 }
753                 
754                 # get rid of any existing sub and try to compile the new one
755                 no strict 'refs';
756
757                 if (exists $Cache{$package}) {
758                         dbg("Redefining $package") if isdbg('command');
759                         undef *$package;
760                 } else {
761                         dbg("Defining $package") if isdbg('command');
762                 }
763                 eval $eval;
764                 
765                 $Cache{$package} = {mtime => $mtime };
766             
767         }
768
769         return $package;
770 }
771
772 sub local_send
773 {
774         my ($self, $let, $buf) = @_;
775         if ($self->{state} eq 'prompt' || $self->{state} eq 'talk') {
776                 if ($self->{enhanced}) {
777                         $self->send_later($let, $buf);
778                 } else {
779                         $self->send($buf);
780                 }
781         } else {
782                 $self->delay($buf);
783         }
784 }
785
786 # send a talk message here
787 sub talk
788 {
789         my ($self, $from, $to, $via, $line) = @_;
790         $line =~ s/\\5E/\^/g;
791         $self->local_send('T', "$to de $from: $line") if $self->{talk};
792         Log('talk', $to, $from, $via?$via:$main::mycall, $line);
793         # send a 'not here' message if required
794         unless ($self->{here} && $from ne $to) {
795                 my $key = "$to$from";
796                 unless (exists $nothereslug{$key}) {
797                         my ($ref, $dxchan);
798                         if (($ref = Route::get($from)) && ($dxchan = $ref->dxchan)) {
799                                 my $name = $self->user->name || $to;
800                                 my $s = $self->user->nothere || $dxchan->msg('nothere', $name);
801                                 $nothereslug{$key} = $main::systime;
802                                 $dxchan->talk($to, $from, undef, $s);
803                         }
804                 }
805         }
806 }
807
808 # send an announce
809 sub announce
810 {
811         my $self = shift;
812         my $line = shift;
813         my $isolate = shift;
814         my $to = shift;
815         my $target = shift;
816         my $text = shift;
817         my ($filter, $hops);
818
819         if (!$self->{ann_talk} && $to ne $self->{call}) {
820                 my $call = AnnTalk::is_talk_candidate($_[0], $text);
821                 return if $call;
822         }
823
824         if ($self->{annfilter}) {
825                 ($filter, $hops) = $self->{annfilter}->it(@_ );
826                 return unless $filter;
827         }
828
829         unless ($self->{ann}) {
830                 return if $_[0] ne $main::myalias && $_[0] ne $main::mycall;
831         }
832         return if $target eq 'SYSOP' && $self->{priv} < 5;
833         my $buf = "$to$target de $_[0]: $text";
834         $buf =~ s/\%5E/^/g;
835         $buf .= "\a\a" if $self->{beep};
836         $self->local_send($target eq 'WX' ? 'W' : 'N', $buf);
837 }
838
839 # send a chat
840 sub chat
841 {
842         my $self = shift;
843         my $line = shift;
844         my $isolate = shift;
845         my $target = shift;
846         my $to = shift;
847         my $text = shift;
848         my ($filter, $hops);
849
850         return unless grep uc $_ eq $target, @{$self->{user}->{group}};
851         
852         $text =~ s/^\#\d+ //;
853         my $buf = "$target de $_[0]: $text";
854         $buf =~ s/\%5E/^/g;
855         $buf .= "\a\a" if $self->{beep};
856         $self->local_send('C', $buf);
857 }
858
859
860 sub wwv
861 {
862         my $self = shift;
863         my $line = shift;
864         my $isolate = shift;
865         my ($filter, $hops);
866
867         return unless $self->{wwv};
868         
869         if ($self->{wwvfilter}) {
870                 ($filter, $hops) = $self->{wwvfilter}->it(@_ );
871                 return unless $filter;
872         }
873
874         my $buf = "WWV de $_[6] <$_[1]>:   SFI=$_[2], A=$_[3], K=$_[4], $_[5]";
875         $buf .= "\a\a" if $self->{beep};
876         $self->local_send('V', $buf);
877 }
878
879 sub wcy
880 {
881         my $self = shift;
882         my $line = shift;
883         my $isolate = shift;
884         my ($filter, $hops);
885
886         return unless $self->{wcy};
887         
888         if ($self->{wcyfilter}) {
889                 ($filter, $hops) = $self->{wcyfilter}->it(@_ );
890                 return unless $filter;
891         }
892
893         my $buf = "WCY de $_[10] <$_[1]> : K=$_[4] expK=$_[5] A=$_[3] R=$_[6] SFI=$_[2] SA=$_[7] GMF=$_[8] Au=$_[9]";
894         $buf .= "\a\a" if $self->{beep};
895         $self->local_send('Y', $buf);
896 }
897
898 # broadcast debug stuff to all interested parties
899 sub broadcast_debug
900 {
901         my $s = shift;                          # the line to be rebroadcast
902         
903         foreach my $dxchan (DXChannel::get_all) {
904                 next unless $dxchan->{enhanced} && $dxchan->{senddbg};
905                 $dxchan->send_later('L', $s);
906         }
907 }
908
909 sub do_entry_stuff
910 {
911         my $self = shift;
912         my $line = shift;
913         my @out;
914         
915         if ($self->state eq 'enterbody') {
916                 my $loc = $self->{loc} || confess "local var gone missing" ;
917                 if ($line eq "\032" || $line eq '%1A' || uc $line eq "/EX") {
918                         no strict 'refs';
919                         push @out, &{$loc->{endaction}}($self);          # like this for < 5.8.0
920                         $self->func(undef);
921                         $self->state('prompt');
922                 } elsif ($line eq "\031" || uc $line eq "/ABORT" || uc $line eq "/QUIT") {
923                         push @out, $self->msg('m10');
924                         delete $loc->{lines};
925                         delete $self->{loc};
926                         $self->func(undef);
927                         $self->state('prompt');
928                 } else {
929                         push @{$loc->{lines}}, length($line) > 0 ? $line : " ";
930                         # i.e. it ain't and end or abort, therefore store the line
931                 }
932         } else {
933                 confess "Invalid state $self->{state}";
934         }
935         return @out;
936 }
937
938 sub store_startup_script
939 {
940         my $self = shift;
941         my $loc = $self->{loc} || confess "local var gone missing" ;
942         my @out;
943         my $call = $loc->{call} || confess "callsign gone missing";
944         confess "lines array gone missing" unless ref $loc->{lines};
945         my $r = Script::store($call, $loc->{lines});
946         if (defined $r) {
947                 if ($r) {
948                         push @out, $self->msg('m19', $call, $r);
949                 } else {
950                         push @out, $self->msg('m20', $call);
951                 }
952         } else {
953                 push @out, "error opening startup script $call $!";
954         } 
955         return @out;
956 }
957
958 1;
959 __END__