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