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Commit | Line | Data |
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b429250e | 1 | #!/usr/bin/perl |
6f4aeba1 DM |
2 | |
3 | use strict; | |
f62194b2 DM |
4 | use warnings; |
5 | ||
6f4aeba1 DM |
6 | use Carp; |
7 | use Getopt::Long; | |
21853580 | 8 | use Time::HiRes qw (usleep gettimeofday tv_interval); |
6f4aeba1 DM |
9 | use POSIX qw(:sys_wait_h errno_h signal_h); |
10 | ||
11 | use MIME::Parser; | |
12 | use File::Path; | |
13 | use Net::Server::PreFork; | |
14 | use Net::Server::SIG qw(register_sig check_sigs); | |
97662001 DM |
15 | use Net::SMTP; |
16 | ||
6f4aeba1 DM |
17 | use Fcntl ':flock'; |
18 | use File::Basename; | |
6f4aeba1 | 19 | use Xdgmime; |
f62194b2 DM |
20 | |
21 | use PVE::SafeSyslog; | |
22 | use PVE::ProcFSTools; | |
23 | use PVE::INotify; | |
6f4aeba1 DM |
24 | |
25 | use Mail::SpamAssassin; | |
26 | use Mail::SpamAssassin::NetSet; | |
6f4aeba1 | 27 | |
f62194b2 DM |
28 | use PMG::pmgcfg; |
29 | use PMG::Utils; | |
30 | use PMG::Cluster; | |
9f67f5b3 | 31 | use PMG::ClusterConfig; |
6f4aeba1 | 32 | |
f62194b2 DM |
33 | use PMG::DBTools; |
34 | use PMG::RuleDB; | |
35 | use PMG::RuleCache; | |
36 | use PMG::ModGroup; | |
37 | use PMG::AtomicFile; | |
38 | use PMG::LDAPSet; | |
39 | use PMG::Config; | |
a43bcf61 | 40 | use PMG::MailQueue; |
91a5af02 | 41 | use PMG::Unpack; |
521dca53 | 42 | use PMG::SMTP; |
6f4aeba1 | 43 | |
521dca53 DM |
44 | use PMG::Unpack; |
45 | use PMG::Statistic; | |
f62194b2 DM |
46 | |
47 | use base qw(Net::Server::PreFork); | |
6f4aeba1 DM |
48 | |
49 | my $opt_commandline = [$0, @ARGV]; | |
50 | my $opt_max_dequeue = 1; | |
51 | my $opt_dequeue_time = 60*2; | |
52 | ||
53 | my $opt_ext_port = 10024; | |
54 | my $opt_int_port = 10023; | |
55 | my $opt_inject_port = 10025; | |
56 | ||
57 | my $opt_testmode; | |
58 | my $opt_untrusted; | |
59 | my $opt_pidfile; | |
60 | my $opt_database; | |
61 | ||
e646f7ca DM |
62 | my $prog_name = 'pmg-smtp-filter'; |
63 | ||
64 | initlog($prog_name, 'mail'); | |
6f4aeba1 DM |
65 | |
66 | if (!GetOptions ('testmode=s' => \$opt_testmode, | |
f62194b2 DM |
67 | 'pidfile=s' => \$opt_pidfile, |
68 | 'untrusted' => \$opt_untrusted, | |
6f4aeba1 DM |
69 | 'database=s' => \$opt_database)) { |
70 | die "usage error\n"; | |
71 | exit (-1); | |
72 | } | |
73 | ||
e646f7ca | 74 | $opt_pidfile = "/var/run/${prog_name}.pid" if !$opt_pidfile; |
6f4aeba1 DM |
75 | |
76 | my $max_servers = 1; | |
77 | my $min_servers = 1; | |
78 | my $min_spare_servers = 0; | |
79 | my $max_spare_servers = 0; | |
80 | my $max_requests = 1; | |
81 | ||
ca49df5f DM |
82 | # create spool directories |
83 | PMG::MailQueue::create_sppoldirs(); | |
84 | ||
6f4aeba1 DM |
85 | if (!$opt_testmode) { |
86 | ||
f62194b2 DM |
87 | my $pmg_cfg = PMG::Config->new(); |
88 | ||
ac5d1312 | 89 | my $demo = $pmg_cfg->get('admin', 'demo'); |
6f4aeba1 DM |
90 | |
91 | if ($demo) { | |
92 | syslog ('info', 'demo mode detected - not starting server'); | |
93 | exit (0); | |
94 | } | |
95 | ||
f62194b2 | 96 | $max_servers = $pmg_cfg->get('mail', 'max_filters') + 2; |
6f4aeba1 DM |
97 | $min_servers = 2; |
98 | $min_spare_servers = 1; | |
99 | $max_spare_servers = 4; | |
100 | $max_requests = 20; | |
101 | } | |
102 | ||
103 | $opt_max_dequeue = 0 if $opt_testmode; | |
104 | ||
105 | my $daemonize = 1; | |
106 | if (defined ($ENV{BOUND_SOCKETS})) { | |
107 | $daemonize = undef; | |
108 | } | |
109 | ||
110 | my $server_attr = { | |
111 | port => [ $opt_int_port, $opt_ext_port ], | |
112 | host => '127.0.0.1', | |
113 | min_servers => $min_servers, | |
114 | max_servers => $max_servers, | |
115 | min_spare_servers => $min_spare_servers, | |
116 | max_spare_servers => $max_spare_servers, | |
117 | max_requests => $max_requests, | |
118 | serialize => 'flock', | |
119 | max_dequeue => $opt_max_dequeue, | |
120 | check_for_dequeue => $opt_dequeue_time, | |
121 | log_level => 3, | |
122 | pid_file => $opt_pidfile, | |
123 | no_close_by_child => 1, | |
124 | no_client_stdout => 1, | |
125 | commandline => $opt_commandline, | |
126 | }; | |
127 | ||
128 | $server_attr->{setsid} = $daemonize if !$opt_testmode; | |
129 | ||
130 | my $database; | |
131 | ||
132 | if (defined($opt_database)) { | |
133 | $database = $opt_database; | |
134 | } else { | |
135 | $database = $opt_testmode ? "Proxmox_testdb" : "Proxmox_ruledb"; | |
136 | } | |
137 | ||
138 | $SIG{'__WARN__'} = sub { | |
139 | my $err = $@; | |
140 | my $t = $_[0]; | |
141 | chomp $t; | |
142 | syslog('warning', "WARNING: %s", $t); | |
143 | $@ = $err; | |
144 | }; | |
145 | ||
146 | sub get_prox_vars { | |
147 | my ($self, $queue, $entity, $msginfo, $rule, $targets, $spaminfo) = @_; | |
148 | ||
149 | $spaminfo = { | |
150 | sa_score => $queue->{sa_score}, | |
151 | sa_hits => $queue->{sa_hits}, | |
152 | sa_data => $queue->{sa_data}, | |
153 | sa_max => $queue->{sa_max} | |
154 | } if !$spaminfo; | |
155 | ||
156 | my $vars = { | |
157 | 'SUBJECT' => $entity->head->get ('subject', 0) || 'No Subject', | |
158 | 'RULE' => $rule->{name}, | |
159 | 'RULE_INFO' => $msginfo->{rule_info}, | |
160 | 'SENDER' => $msginfo->{sender}, | |
161 | 'SENDER_IP' => $msginfo->{xforward}->{addr}, | |
162 | 'TARGETS' => join (', ', @$targets), | |
163 | 'RECEIVERS' => join (', ', @{$msginfo->{targets}}), | |
164 | 'SPAMLEVEL' => $spaminfo->{sa_score}, | |
165 | 'SPAMSTARS' => '*' x (($spaminfo->{sa_score} || 0) > 100 ? 100 : $spaminfo->{sa_score} || 0), | |
ac5d1312 | 166 | 'ADMIN' => $self->{pmg_cfg}->get('admin', 'email'), |
6f4aeba1 DM |
167 | 'HOST' => $msginfo->{hostname}, |
168 | 'DOMAIN' => $msginfo->{domain}, | |
169 | 'FQDN' => $msginfo->{fqdn}, | |
170 | 'MSGID' => $queue->{msgid}, | |
f62194b2 | 171 | 'VERSION' => PMG::pmgcfg::package() . "/" . PMG::pmgcfg::version() . "/" . PMG::pmgcfg::repoid(), |
6f4aeba1 DM |
172 | }; |
173 | ||
174 | $vars->{__spaminfo} = $spaminfo; | |
175 | ||
176 | if ($opt_testmode) { | |
521dca53 | 177 | if ($queue->{vinfo_clam}) { |
6f4aeba1 DM |
178 | $vars->{'VIRUS_INFO'} = "Virus Info:"; |
179 | $vars->{'VIRUS_INFO'} .= " clam: $queue->{vinfo_clam}" if $queue->{vinfo_clam}; | |
6f4aeba1 DM |
180 | } else { |
181 | $vars->{'VIRUS_INFO'} = ''; | |
182 | } | |
183 | } else { | |
184 | if ($queue->{vinfo}) { | |
185 | $vars->{'VIRUS_INFO'} = "Virus Info: $queue->{vinfo}\n"; | |
186 | } else { | |
187 | $vars->{'VIRUS_INFO'} = ''; | |
188 | } | |
189 | } | |
190 | ||
191 | $vars->{'SPAM_HITS'} = $spaminfo->{sa_hits}; | |
192 | ||
193 | $vars->{'SPAM_INFO'} = ''; | |
194 | my $sscores = $spaminfo->{sa_data}; | |
195 | ||
196 | if (defined ($sscores) && @$sscores != -1) { | |
197 | my $sa_text; | |
198 | if ($opt_testmode) { | |
199 | $sa_text = "Spam detection results: 100\n"; | |
200 | } else { | |
201 | $sa_text = "Spam detection results: $spaminfo->{sa_score}\n"; | |
202 | } | |
203 | ||
204 | foreach my $s (@$sscores) { | |
205 | if ($opt_testmode) { | |
f62194b2 | 206 | $sa_text .= sprintf ("%-22s %6s %s\n", $s->{rule}, |
6f4aeba1 DM |
207 | 1, $s->{desc} || '-'); |
208 | } else { | |
f62194b2 | 209 | $sa_text .= sprintf ("%-22s %6s %s\n", $s->{rule}, |
6f4aeba1 DM |
210 | $s->{score}, $s->{desc} || '-'); |
211 | } | |
212 | } | |
213 | $vars->{'SPAM_INFO'} = $sa_text; | |
214 | } | |
215 | ||
216 | if ($opt_testmode) { | |
217 | delete ($vars->{'ADMIN'}); | |
218 | #delete ($vars->{'SPAM_INFO'}); | |
219 | } | |
220 | ||
221 | return $vars; | |
222 | } | |
223 | ||
224 | sub apply_rules { | |
225 | my ($self, $queue, $msginfo, $entity, $ldap) = @_; | |
226 | ||
227 | my $final; | |
228 | my %rule_targets; | |
229 | my %rule_actions; | |
230 | my %rule_marks; | |
231 | my $matching_rules = []; | |
232 | ||
233 | my $rulecache = $self->{rulecache}; | |
234 | my $rules = $rulecache->rules (); | |
235 | my $dbh = $self->{ruledb}->{dbh}; | |
f62194b2 DM |
236 | |
237 | # first, we remove all conditional written 'X-' header attributes | |
6f4aeba1 DM |
238 | foreach my $rule (@$rules) { |
239 | next if !$rule->{active}; | |
240 | next if ($rule->{direction} == 0) && $msginfo->{trusted}; | |
241 | next if ($rule->{direction} == 1) && !$msginfo->{trusted}; | |
242 | ||
243 | my $actions = $rulecache->get_actions ($rule->{id}); | |
244 | if ($actions) { | |
245 | foreach my $action (@$actions) { | |
521dca53 | 246 | if ($action->isa ("PMG::RuleDB::ModField")) { |
6f4aeba1 DM |
247 | my $fname = $action->{field}; |
248 | next if $fname !~ m/^X-/i; | |
249 | $entity->head->delete($fname); | |
250 | } | |
251 | } | |
252 | } | |
253 | } | |
254 | ||
255 | foreach my $rule (@$rules) { | |
256 | next if !$rule->{active}; | |
257 | next if ($rule->{direction} == 0) && $msginfo->{trusted}; | |
258 | next if ($rule->{direction} == 1) && !$msginfo->{trusted}; | |
259 | ||
260 | # match from, when and what classes (not target dependent) | |
261 | if (!($rulecache->from_match ($rule->{id}, $msginfo->{sender}, $msginfo->{xforward}->{addr}, $ldap) && | |
262 | $rulecache->when_match ($rule->{id}, time))) { | |
263 | next; | |
264 | } | |
265 | ||
f62194b2 | 266 | $rule_marks{$rule->{id}} = |
6f4aeba1 DM |
267 | $rulecache->what_match ($rule->{id}, $queue, $entity, $msginfo, $dbh); |
268 | ||
269 | $rule_actions{$rule->{id}} = $rulecache->get_actions ($rule->{id}); | |
270 | my $fin = $rulecache->final ($rule->{id}); | |
271 | ||
272 | # match targets | |
273 | foreach my $target (@{$msginfo->{targets}}) { | |
274 | next if $final->{$target}; | |
275 | next if !defined ($rule_marks{$rule->{id}}); | |
276 | next if !defined ($rule_marks{$rule->{id}}->{$target}); | |
277 | next if !defined ($rule_marks{$rule->{id}}->{$target}->{marks}); | |
278 | next if !$rulecache->to_match ($rule->{id}, $target, $ldap); | |
279 | ||
280 | $final->{$target} = $fin; | |
281 | ||
282 | push @{$rule_targets{$rule->{id}}}, $target; | |
f62194b2 | 283 | } |
6f4aeba1 DM |
284 | } |
285 | ||
286 | # Compute rule_info (summary about matching rule) | |
f62194b2 | 287 | # this can be used for debugging |
6f4aeba1 DM |
288 | my $rule_info = ""; |
289 | foreach my $rule (@$rules) { | |
290 | next if !$rule_targets{$rule->{id}}; | |
291 | ||
292 | push @$matching_rules, $rule->{id}; | |
293 | ||
294 | $rule_info .= "Rule: $rule->{name}\n"; | |
295 | ||
296 | foreach my $target (@{$rule_targets{$rule->{id}}}) { | |
297 | $rule_info .= " Receiver: $target\n"; | |
f62194b2 | 298 | } |
6f4aeba1 DM |
299 | foreach my $action (@{$rule_actions{$rule->{id}}}) { |
300 | $rule_info .= " Action: " . $action->short_desc () . "\n"; | |
301 | } | |
302 | ||
303 | } | |
304 | $msginfo->{rule_info} = $rule_info; | |
305 | ||
306 | if ($msginfo->{testmode}) { | |
2d611b3b | 307 | my $vars = $self->get_prox_vars($queue, $entity, $msginfo, undef, [], undef); |
6f4aeba1 | 308 | my $fh = $msginfo->{test_fh}; |
2d611b3b | 309 | print $fh $rule_info; |
6f4aeba1 DM |
310 | } |
311 | ||
312 | # apply actions | |
313 | ||
f62194b2 | 314 | my $mod_group = PMG::ModGroup->new($entity, $msginfo->{targets}); |
6f4aeba1 DM |
315 | |
316 | foreach my $rule (@$rules) { | |
317 | my $targets = $rule_targets{$rule->{id}}; | |
318 | next if !$targets; | |
f62194b2 | 319 | |
6f4aeba1 DM |
320 | my $spaminfo; |
321 | foreach my $t (@$targets) { | |
322 | if ($rule_marks{$rule->{id}}->{$t} && $rule_marks{$rule->{id}}->{$t}->{spaminfo}) { | |
323 | $spaminfo = $rule_marks{$rule->{id}}->{$t}->{spaminfo}; | |
324 | # we assume spam info is the same for all matching targets | |
325 | last; | |
326 | } | |
327 | } | |
328 | ||
329 | my $vars = $self->get_prox_vars ($queue, $entity, $msginfo, $rule, | |
330 | $rule_targets{$rule->{id}}, $spaminfo); | |
331 | ||
332 | ||
f62194b2 | 333 | my @sorted_actions = |
6f4aeba1 | 334 | sort {$a->priority <=> $b->priority} @{$rule_actions{$rule->{id}}}; |
f62194b2 | 335 | |
6f4aeba1 | 336 | foreach my $action (@sorted_actions) { |
f62194b2 | 337 | $action->execute ($queue, $self->{ruledb}, $mod_group, |
6f4aeba1 DM |
338 | $rule_targets{$rule->{id}}, |
339 | $msginfo, $vars, $rule_marks{$rule->{id}}->{marks}, $ldap); | |
340 | last if $action->final; | |
341 | } | |
342 | } | |
343 | ||
344 | # we deliver all mail not matched by any rule | |
345 | # (default action = accept) | |
346 | my $unmatched; | |
347 | foreach my $target (@{$msginfo->{targets}}) { | |
348 | next if $final->{$target}; | |
349 | ||
350 | push @$unmatched, $target; | |
351 | } | |
352 | ||
353 | if ($unmatched) { | |
521dca53 | 354 | my $accept = PMG::RuleDB::Accept->new (); |
f62194b2 | 355 | $accept->execute ($queue, $self->{ruledb}, $mod_group, $unmatched, |
6f4aeba1 DM |
356 | $msginfo, undef, undef, undef); |
357 | } | |
358 | ||
359 | return $matching_rules; | |
360 | } | |
361 | ||
f62194b2 | 362 | # reload ruledb and pmg config |
6f4aeba1 DM |
363 | sub load_config { |
364 | my $self = shift; | |
365 | my $prop = $self->{server}; | |
366 | ||
367 | if ($self->{ruledb}) { | |
368 | $self->log (0, "reloading configuration $database"); | |
369 | $self->{ruledb}->close (); | |
370 | } | |
371 | ||
f62194b2 DM |
372 | $self->{pmg_cfg} = PMG::Config->new(); |
373 | $self->{cinfo} = PVE::INotify::read_file("cluster.conf"); | |
6f4aeba1 DM |
374 | |
375 | eval { | |
f62194b2 DM |
376 | my $dbh = PMG::DBTools::open_ruledb ($database); |
377 | $self->{ruledb} = PMG::RuleDB->new ($dbh); | |
6f4aeba1 DM |
378 | |
379 | # load rulecache | |
f62194b2 | 380 | $self->{rulecache} = PMG::RuleCache->new ($self->{ruledb}); |
6f4aeba1 DM |
381 | }; |
382 | ||
383 | my $err = $@; | |
384 | ||
385 | if ($err) { | |
386 | sleep (10); # reduce restart rate when postgres is down | |
387 | die $err; | |
388 | } | |
389 | ||
f62194b2 DM |
390 | # create LDAP object |
391 | $self->{ldap} = PMG::LDAPSet->new_from_pmg_cfg($self->{pmg_cfg}, 1); | |
6f4aeba1 | 392 | |
f62194b2 | 393 | $self->{reload_config} = 0; |
6f4aeba1 DM |
394 | } |
395 | ||
f62194b2 DM |
396 | my $syslog_map = { |
397 | 0 => 'err', | |
398 | 1 => 'warning', | |
399 | 2 => 'notice', | |
400 | 3 => 'info', | |
401 | 4 => 'debug' | |
402 | }; | |
403 | ||
6f4aeba1 DM |
404 | sub log { |
405 | my ($self, $level, $msg, @therest) = @_; | |
406 | my $prop = $self->{server}; | |
407 | ||
408 | return if $level =~ /^\d+$/ && $level > $prop->{log_level}; | |
409 | ||
f62194b2 | 410 | $level = $syslog_map->{$level} || $level; |
6f4aeba1 DM |
411 | if (@therest) { |
412 | syslog($level, $msg, @therest); | |
413 | } else { | |
414 | syslog ($level, $msg); | |
415 | } | |
416 | } | |
417 | ||
418 | sub pre_loop_hook { | |
419 | my $self = shift; | |
420 | my $prop = $self->{server}; | |
421 | ||
422 | $prop->{log_level} = 3; | |
423 | ||
424 | $self->log (0, "Filter daemon (re)started (max. $max_servers processes)"); | |
425 | ||
521dca53 | 426 | eval { PMG::MailQueue::cleanup_active(); }; |
6f4aeba1 DM |
427 | $self->log (0, "Cleanup failures: $@") if $@; |
428 | ||
429 | my $sig_set = POSIX::SigSet->new; | |
f62194b2 DM |
430 | $sig_set->addset (&POSIX::SIGHUP); |
431 | $sig_set->addset (&POSIX::SIGCHLD); | |
6f4aeba1 DM |
432 | my $old_sig_set = POSIX::SigSet->new(); |
433 | ||
434 | sigprocmask (SIG_UNBLOCK, $sig_set, $old_sig_set); | |
435 | ||
436 | my ($backup_umask) = umask; | |
437 | ||
f62194b2 DM |
438 | my $pmg_cfg = PMG::Config->new(); |
439 | ||
440 | # Note: you need to restart the daemon when you change 'rbl_checks' | |
441 | my $rbl_checks = $pmg_cfg->get('spam', 'rbl_checks'); | |
6f4aeba1 DM |
442 | |
443 | $self->{sa} = Mail::SpamAssassin->new ({ | |
444 | debug => 0, | |
f62194b2 | 445 | local_tests_only => $opt_testmode || !$rbl_checks, |
6f4aeba1 DM |
446 | home_dir_for_helpers => '/root', |
447 | userstate_dir => '/root/.spamassassin', | |
448 | dont_copy_prefs => 1, | |
449 | stop_at_threshold => 0, | |
450 | }); | |
451 | ||
452 | $self->{sa}->compile_now; | |
453 | ||
454 | alarm (0); # SA forgets to clear alarm in some cases | |
455 | umask ($backup_umask); | |
e646f7ca | 456 | initlog ($prog_name, 'mail'); |
6f4aeba1 DM |
457 | |
458 | $SIG{'USR1'} = sub { | |
459 | # reloading server configuration | |
460 | if (defined $prop->{children}) { | |
461 | foreach my $pid (keys %{$prop->{children}}) { | |
462 | kill (10, $pid); # SIGUSR1 childs | |
463 | } | |
464 | } | |
465 | } | |
466 | } | |
467 | ||
468 | sub child_init_hook { | |
469 | my $self = shift; | |
470 | ||
e646f7ca | 471 | $0 = "$prog_name child"; |
6f4aeba1 DM |
472 | |
473 | # $self->log (3, "init child"); | |
474 | ||
475 | eval { | |
476 | $self->load_config (); | |
477 | }; | |
478 | ||
479 | if ($@) { | |
480 | $self->log (0, $@); | |
481 | $self->child_finish_hook; | |
482 | exit; | |
483 | } | |
484 | ||
485 | $SIG{'USR1'} = sub { | |
f62194b2 | 486 | $self->{reload_config} = 1; |
6f4aeba1 DM |
487 | } |
488 | } | |
489 | ||
490 | sub child_finish_hook { | |
491 | my $self = shift; | |
f62194b2 | 492 | |
6f4aeba1 DM |
493 | # $self->log (3, "finish child"); |
494 | $self->{ruledb}->close () if $self->{ruledb}; | |
495 | } | |
496 | ||
497 | sub run_dequeue { | |
498 | my $self = shift; | |
499 | ||
500 | # do database maintainance here | |
501 | ||
502 | $self->log (2, "starting database maintainance"); | |
503 | ||
504 | my ($csec, $usec) = gettimeofday (); | |
505 | ||
f62194b2 DM |
506 | my $cinfo = PVE::INotify::read_file("cluster.conf"); |
507 | ||
6f4aeba1 | 508 | my $dbh; |
f62194b2 | 509 | |
6f4aeba1 | 510 | eval { |
f62194b2 | 511 | $dbh = PMG::DBTools::open_ruledb($database); |
6f4aeba1 | 512 | }; |
6f4aeba1 DM |
513 | my $err = $@; |
514 | ||
515 | if ($err) { | |
f62194b2 | 516 | $self->log (0, msgquote("ERROR: $err")); |
6f4aeba1 DM |
517 | return; |
518 | } | |
519 | ||
520 | eval { | |
521dca53 | 521 | PMG::Statistic::update_stats($dbh, $cinfo); |
6f4aeba1 | 522 | }; |
6f4aeba1 DM |
523 | $err = $@; |
524 | ||
525 | my ($csec_end, $usec_end) = gettimeofday (); | |
526 | my $ptime = int (($csec_end-$csec)*1000 + ($usec_end - $usec)/1000); | |
527 | ||
528 | if ($err) { | |
f62194b2 | 529 | $self->log (0, msgquote($err)); |
6f4aeba1 DM |
530 | } else { |
531 | $self->log (2, "end database maintainance ($ptime ms)"); | |
532 | } | |
533 | ||
534 | $dbh->disconnect() if $dbh; | |
535 | } | |
536 | ||
537 | ||
538 | sub unpack_entity { | |
539 | my ($self, $unpack, $entity, $msginfo, $queue) = @_; | |
540 | ||
541 | my $magic; | |
542 | my $path; | |
543 | ||
f62194b2 | 544 | if (($magic = $entity->{PMX_magic_ct}) && |
6f4aeba1 DM |
545 | ($path = $entity->{PMX_decoded_path})) { |
546 | ||
547 | my $filename = basename ($path); | |
548 | ||
521dca53 | 549 | if (PMG::Unpack::is_archive ($magic)) { |
6f4aeba1 DM |
550 | $self->log (3, "$queue->{logid}: found archive '$filename' ($magic)"); |
551 | ||
552 | my $start = [gettimeofday]; | |
553 | ||
554 | $unpack->{mime} = {}; | |
555 | ||
f62194b2 DM |
556 | eval { |
557 | $unpack->unpack_archive ($path, $magic); | |
6f4aeba1 DM |
558 | }; |
559 | ||
560 | $self->log (3, "$queue->{logid}: unpack failed - $@") if $@; | |
561 | ||
562 | $entity->{PMX_content_types} = $unpack->{mime}; | |
f62194b2 | 563 | |
6f4aeba1 DM |
564 | if ($opt_testmode) { |
565 | my $types = join (", ", sort keys (%{$entity->{PMX_content_types}})); | |
566 | my $fh = $msginfo->{test_fh}; | |
567 | $filename =~ s/\d+/X/g if $filename =~ m/^msg-\d+-\d+.msg/; | |
568 | print $fh "Types:$filename: $types\n" if $types; | |
569 | } | |
570 | ||
571 | my $elapsed = int(tv_interval ($start) * 1000); | |
572 | ||
573 | $self->log (3, "$queue->{logid}: unpack archive '$filename' done ($elapsed ms)"); | |
574 | } | |
575 | } | |
576 | ||
577 | foreach my $part ($entity->parts) { | |
578 | $self->unpack_entity ($unpack, $part, $msginfo, $queue); | |
579 | } | |
580 | ||
581 | } | |
582 | ||
583 | sub handle_smtp { | |
584 | my ($self, $smtp) = @_; | |
585 | ||
586 | my ($csec, $usec) = gettimeofday (); | |
587 | ||
588 | my $queue; | |
589 | my $msginfo = {}; | |
f62194b2 | 590 | my $pmg_cfg = $self->{pmg_cfg}; |
6f4aeba1 DM |
591 | my $ldap = $self->{ldap}; |
592 | my $cinfo = $self->{cinfo}; | |
593 | my $lcid = $cinfo->{local}->{cid}; | |
f62194b2 DM |
594 | |
595 | $msginfo->{test_fh} = PMG::AtomicFile->new("testresult.out", "w") | |
6f4aeba1 DM |
596 | if $opt_testmode; |
597 | ||
598 | $msginfo->{trusted} = $self->{trusted}; | |
599 | ||
600 | ||
601 | # PHASE 1 - save incoming mail (already done) | |
602 | # on error: exit | |
603 | ||
604 | $queue = $smtp->{queue}; | |
605 | $queue->{sa} = $self->{sa}; | |
606 | ||
f62194b2 | 607 | $queue->{lic_valid} = 1; |
6f4aeba1 DM |
608 | |
609 | my $matching_rules; | |
610 | ||
611 | eval { | |
612 | $msginfo->{testmode} = $opt_testmode; | |
613 | $msginfo->{sender} = $smtp->{from}; | |
614 | $msginfo->{xforward} = $smtp->{xforward}; | |
615 | $msginfo->{targets} = $smtp->{to}; | |
616 | ||
f62194b2 DM |
617 | $msginfo->{hostname} = PVE::INotify::nodename(); |
618 | my $resolv = PVE::INotify::read_file('resolvconf'); | |
619 | ||
620 | $msginfo->{domain} = $resolv->{search}; | |
6f4aeba1 DM |
621 | $msginfo->{fqdn} = "$msginfo->{hostname}.$msginfo->{domain}"; |
622 | $msginfo->{lcid} = $lcid; | |
f62194b2 | 623 | |
6f4aeba1 DM |
624 | # $msginfo->{targets} is case sensitive, |
625 | # but pmail is always lower case! | |
626 | ||
627 | foreach my $t (@{$msginfo->{targets}}) { | |
628 | my $res; | |
629 | if ($ldap && ($res = $ldap->account_info ($t))) { | |
630 | $msginfo->{pmail}->{$t} = $res->{pmail}; | |
631 | } else { | |
632 | $msginfo->{pmail}->{$t} = lc ($t); | |
633 | } | |
634 | } | |
635 | ||
636 | # PHASE 2 - parse mail | |
637 | # on error: exit | |
6f4aeba1 | 638 | |
f62194b2 DM |
639 | my $maxfiles = $pmg_cfg->get('clamav', 'archivemaxfiles'); |
640 | ||
641 | my $entity = $queue->parse_mail($maxfiles); | |
6f4aeba1 DM |
642 | |
643 | $self->log (3, "$queue->{logid}: new mail message-id=%s", $queue->{msgid}); | |
644 | ||
645 | # PHASE 3 - run external content analyzers | |
646 | # (SPAM analyzer is run on demand later) | |
647 | # on error: log error messages | |
648 | ||
649 | ||
650 | # test for virus first | |
f62194b2 DM |
651 | $queue->{vinfo} = PMG::Utils::analyze_virus( |
652 | $queue, $queue->{dataname}, $pmg_cfg, $opt_testmode); | |
6f4aeba1 | 653 | |
6f4aeba1 DM |
654 | # always add this headers to incoming mails |
655 | # to enable user to report false negatives | |
656 | if (!$msginfo->{trusted}) { | |
6f4aeba1 DM |
657 | if ($queue->{vinfo}) { |
658 | $entity->head->replace('X-Proxmox-VInfo', $queue->{vinfo}); | |
659 | } | |
6f4aeba1 DM |
660 | } |
661 | ||
662 | # we unpack after virus scanning, because this is more secure. | |
663 | # This way virus scanners gets the whole mail files and are able | |
664 | # to detect phishing signature for example - which would not work | |
665 | # if we decompose first and only analyze the decomposed attachments. | |
f62194b2 | 666 | # Disadvantage is that we need to unpack more than |
6f4aeba1 | 667 | # once (bad performance). |
f62194b2 | 668 | |
6f4aeba1 DM |
669 | # should we scan content types inside archives |
670 | ||
6f4aeba1 DM |
671 | my $rulecache = $self->{rulecache}; |
672 | ||
673 | my $scan_archives = 0; | |
674 | ||
675 | if (($rulecache->{archivefilter_in} && !$msginfo->{trusted}) || | |
676 | ($rulecache->{archivefilter_out} && $msginfo->{trusted})) { | |
677 | $scan_archives = 1; | |
678 | } | |
679 | ||
680 | if ($scan_archives && !$queue->{vinfo}) { | |
681 | ||
682 | # unpack all archives - determine contained content types | |
683 | ||
684 | my $decdir = $queue->{dumpdir} . "/__decoded_archives"; | |
685 | mkdir $decdir; | |
686 | ||
687 | my $start = [gettimeofday]; | |
f62194b2 | 688 | |
6f4aeba1 DM |
689 | my $unpack; |
690 | eval { | |
691 | ||
692 | # limits: We use clamav limit for maxfiles, and scan | |
693 | # only 4 levels, timeout of 30 seconds | |
694 | ||
521dca53 DM |
695 | $unpack = PMG::Unpack->new ( |
696 | tmpdir => $decdir, | |
697 | timeout => 30, | |
698 | ctonly => 1, # only detect CTs | |
699 | maxrec => -4, | |
700 | maxfiles => $maxfiles); | |
6f4aeba1 | 701 | |
f62194b2 | 702 | $self->unpack_entity ($unpack, $entity, $msginfo, $queue); |
6f4aeba1 DM |
703 | }; |
704 | ||
705 | my $err = $@; | |
706 | ||
707 | $unpack->cleanup() if $unpack; | |
708 | ||
709 | my $elapsed = int(tv_interval ($start) * 1000); | |
710 | ||
711 | if ($err) { | |
712 | $self->log (3, "$queue->{logid}: unpack archive failed ($elapsed ms) - $err"); | |
713 | } | |
714 | } | |
715 | ||
716 | # PHASE 4 - apply rules | |
717 | # on error: exit (cleanup process should do the rest) | |
f62194b2 | 718 | $msginfo->{maxspamsize} = $pmg_cfg->get('spam', 'maxspamsize'); |
6f4aeba1 DM |
719 | if ($msginfo->{maxspamsize} <= 1024*64) { |
720 | $msginfo->{maxspamsize} = 1024*64; | |
721 | } | |
722 | ||
723 | if ($msginfo->{trusted}) { | |
f62194b2 | 724 | my $hide = $pmg_cfg->get('mail', 'hide_received'); |
6f4aeba1 DM |
725 | $entity->head->delete("Received") if $hide; |
726 | } | |
727 | ||
f62194b2 | 728 | $matching_rules = $self->apply_rules($queue, $msginfo, $entity, $ldap); |
6f4aeba1 | 729 | }; |
f62194b2 | 730 | |
6f4aeba1 DM |
731 | my $err = $@; |
732 | ||
733 | $self->{errors} = $queue->{errors}; | |
734 | ||
735 | # restart on error | |
736 | $self->{errors} = 1 if $err; | |
737 | ||
738 | $queue->close (); | |
739 | ||
740 | die $err if $err; | |
741 | ||
742 | my ($csec_end, $usec_end) = gettimeofday (); | |
f62194b2 | 743 | my $time_total = |
6f4aeba1 DM |
744 | int (($csec_end-$csec)*1000 + ($usec_end - $usec)/1000); |
745 | ||
746 | # PHASE 5 - log statistics | |
747 | # on error: log error messages | |
748 | ||
749 | eval { | |
750 | my $dbh = $self->{ruledb}->{dbh}; | |
751 | my $where = ""; | |
752 | foreach my $rid (@$matching_rules) { | |
753 | $where .= $where ? " OR ID = $rid" : "ID = $rid"; | |
754 | } | |
755 | if ($where) { | |
756 | $dbh->do ("UPDATE Rule " . | |
757 | "SET Count = Count + 1 " . | |
758 | "WHERE $where"); | |
759 | } | |
760 | ||
761 | my $insert_cmds = "SELECT nextval ('cstatistic_id_seq');INSERT INTO CStatistic " . | |
762 | "(CID, RID, ID, Time, Bytes, Direction, Spamlevel, VirusInfo, PTime, Sender) VALUES (" . | |
763 | "$lcid, currval ('cstatistic_id_seq'), currval ('cstatistic_id_seq'),"; | |
764 | ||
765 | $insert_cmds .= $queue->{rtime} . ','; | |
766 | $insert_cmds .= $queue->{bytes} . ','; | |
767 | $insert_cmds .= $dbh->quote ($msginfo->{trusted} ? 0 : 1) . ','; | |
768 | $insert_cmds .= ($queue->{sa_score} || 0) . ','; | |
769 | $insert_cmds .= $dbh->quote ($queue->{vinfo}) . ','; | |
770 | $insert_cmds .= $time_total . ','; | |
771 | $insert_cmds .= $dbh->quote ($msginfo->{sender}) . ');'; | |
772 | ||
773 | foreach my $r (@{$msginfo->{targets}}) { | |
774 | my $tmp = $dbh->quote ($r); | |
775 | my $blocked = $queue->{status}->{$r} eq 'blocked' ? 1 : 0; | |
776 | $insert_cmds .= "INSERT INTO CReceivers (CStatistic_CID, CStatistic_RID, Receiver, Blocked) " . | |
777 | "VALUES ($lcid, currval ('cstatistic_id_seq'), $tmp, '$blocked'); "; | |
778 | } | |
779 | ||
780 | $dbh->do ($insert_cmds); | |
781 | }; | |
f62194b2 | 782 | |
6f4aeba1 DM |
783 | # save $err (because log clears $@) |
784 | $err = $@; | |
785 | ||
786 | $time_total = $time_total/1000; | |
787 | ||
788 | my $ptspam = ($queue->{ptime_spam} || 0)/1000; | |
6f4aeba1 DM |
789 | my $ptclam = ($queue->{ptime_clam} || 0)/1000; |
790 | ||
521dca53 | 791 | $self->log (3, "$queue->{logid}: processing time: ${time_total} seconds ($ptspam, $ptclam)"); |
6f4aeba1 DM |
792 | |
793 | $msginfo->{test_fh}->close if $opt_testmode; | |
794 | ||
f62194b2 | 795 | die $err if ($err); |
6f4aeba1 DM |
796 | } |
797 | ||
798 | ||
799 | sub process_request { | |
800 | my $self = shift; | |
801 | my $prop = $self->{server}; | |
802 | my $sock = $prop->{client}; | |
803 | ||
804 | eval { | |
805 | ||
806 | # make sure the ldap cache is up to date | |
807 | $self->{ldap}->update (1); | |
808 | ||
f62194b2 | 809 | $self->load_config() if $self->{reload_config}; |
6f4aeba1 DM |
810 | |
811 | $self->{trusted} = 0; | |
812 | if ($prop->{sockport} == $opt_int_port && !$opt_untrusted) { | |
813 | $self->{trusted} = 1; | |
814 | } | |
815 | ||
521dca53 | 816 | my $smtp = PMG::SMTP->new ($sock); |
6f4aeba1 DM |
817 | |
818 | my $maxcount = $max_requests - $prop->{requests}; | |
819 | ||
820 | my $count = $smtp->loop (\&handle_smtp, $self, $maxcount); | |
821 | if ($count > 1) { | |
822 | $prop->{requests} += $count - 1; | |
823 | } | |
824 | }; | |
f62194b2 | 825 | |
6f4aeba1 DM |
826 | my $err = $@; |
827 | ||
828 | $self->log (0, $err) if $err; | |
829 | ||
24244199 | 830 | kill(15, $prop->{ppid}) if $opt_testmode; |
6f4aeba1 | 831 | |
f62194b2 | 832 | my $mem = PVE::ProcFSTools::read_memory_usage(); |
6f4aeba1 DM |
833 | |
834 | if ($opt_testmode) { | |
835 | $self->log (0, "memory usage: $mem->{size} bytes"); | |
836 | } else { | |
837 | if ($self->{errors}) { | |
838 | $self->log (0, "fast exit because of errors (free $mem->{size} bytes)"); | |
839 | $self->done (1); | |
b2c5dc31 | 840 | } elsif ($mem->{size} > (400*1024*1024)) { |
6f4aeba1 DM |
841 | $self->log (0, "fast exit to reduce server load (free $mem->{size} bytes)"); |
842 | $self->done (1); | |
843 | } | |
844 | } | |
845 | ||
846 | $self->done (1) if $err; | |
847 | } | |
848 | ||
e646f7ca | 849 | # test sig_hup with: for ((;;)) ;do kill -HUP `cat /var/run/${prog_name}.pid`; done; |
6f4aeba1 DM |
850 | # wrapper to avoid multiple calls to sig_hup |
851 | sub sig_hup { | |
852 | my $self = shift; | |
853 | my $prop = $self->{server}; | |
854 | ||
855 | return if defined ($prop->{_HUP}); # do not call twice | |
856 | ||
857 | $self->SUPER::sig_hup(); | |
858 | } | |
859 | ||
860 | sub restart_close_hook { | |
861 | my $self = shift; | |
862 | ||
863 | my $sig_set = POSIX::SigSet->new; | |
f62194b2 | 864 | $sig_set->addset (&POSIX::SIGHUP); |
6f4aeba1 DM |
865 | $sig_set->addset (&POSIX::SIGCHLD); # to avoid zombies |
866 | my $old_sig_set = POSIX::SigSet->new(); | |
867 | ||
868 | sigprocmask (SIG_BLOCK, $sig_set, $old_sig_set); | |
869 | } | |
870 | ||
871 | sub pre_server_close_hook { | |
872 | my $self = shift; | |
873 | my $prop = $self->{server}; | |
874 | ||
875 | if (defined $prop->{_HUP}) { | |
f62194b2 | 876 | undef $prop->{pid_file_unlink}; |
6f4aeba1 DM |
877 | } |
878 | ||
879 | if (defined $prop->{children}) { | |
880 | foreach my $pid (keys %{$prop->{children}}) { | |
881 | kill (1, $pid); # HUP childs | |
882 | } | |
883 | } | |
884 | ||
885 | # nicely shutdown childs (give them max 30 seconds to shut down) | |
886 | my $previous_alarm = alarm (30); | |
887 | eval { | |
888 | local $SIG{ALRM} = sub { die "Timed Out!\n" }; | |
f62194b2 | 889 | |
6f4aeba1 DM |
890 | my $pid; |
891 | 1 while ((($pid = waitpid (-1, 0)) > 0) || ($! == EINTR)); | |
892 | }; | |
893 | alarm ($previous_alarm); | |
894 | } | |
895 | ||
896 | # initialize mime system before fork | |
897 | xdg_mime_get_mime_type_for_file ($0); | |
898 | ||
899 | my $server = bless { | |
900 | server => $server_attr, | |
901 | }; | |
902 | ||
903 | if (!$opt_testmode) { | |
904 | $server->run (); | |
905 | } else { | |
906 | if (fork) { | |
21853580 | 907 | $server->run(); |
6f4aeba1 | 908 | } else { |
21853580 | 909 | |
f62194b2 DM |
910 | my $sender ='sender@proxtest.com'; |
911 | my $targets = ['target1@proxtest.com', | |
6f4aeba1 DM |
912 | 'target2@proxtest.com', |
913 | 'target3@proxtest.com']; | |
914 | ||
21853580 DM |
915 | my $smtp; |
916 | while (!$smtp) { | |
917 | $smtp = Net::SMTP->new ('127.0.0.1', Port => 10023); | |
918 | last if $smtp; | |
919 | usleep(10); | |
920 | } | |
6f4aeba1 DM |
921 | |
922 | # syslog ('info', "connected to " . $smtp->domain); | |
923 | ||
924 | $smtp->mail ($sender); | |
925 | $smtp->to (@$targets); | |
926 | ||
927 | $smtp->data(); | |
928 | ||
f62194b2 DM |
929 | open (TMP, $opt_testmode) || |
930 | die "unable to upen file '$opt_testmode' - $! :ERROR"; | |
6f4aeba1 DM |
931 | while (<TMP>) { |
932 | $smtp->datasend ($_); | |
933 | } | |
934 | close TMP; | |
935 | ||
936 | $smtp->datasend ("\n"); | |
937 | $smtp->dataend (); | |
938 | ||
939 | $smtp->quit; | |
940 | } | |
941 | } | |
942 | ||
943 | exit (0); | |
944 | ||
945 | __END__ | |
946 | ||
947 | =head1 NAME | |
f62194b2 DM |
948 | |
949 | pmg-smtp-filter - the Proxmox mail filter | |
6f4aeba1 DM |
950 | |
951 | =head1 SYNOPSIS | |
952 | ||
f62194b2 | 953 | pmg-smtp-filter [-u] [-t testfile] |
6f4aeba1 DM |
954 | |
955 | =head1 DESCRIPTION | |
956 | ||
957 | Documentation is available at www.proxmox.com |