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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; | |
7b3c53bd | 38 | use PMG::LDAPConfig; |
f62194b2 DM |
39 | use PMG::LDAPSet; |
40 | use PMG::Config; | |
a43bcf61 | 41 | use PMG::MailQueue; |
91a5af02 | 42 | use PMG::Unpack; |
521dca53 | 43 | use PMG::SMTP; |
6f4aeba1 | 44 | |
521dca53 DM |
45 | use PMG::Unpack; |
46 | use PMG::Statistic; | |
f62194b2 DM |
47 | |
48 | use base qw(Net::Server::PreFork); | |
6f4aeba1 DM |
49 | |
50 | my $opt_commandline = [$0, @ARGV]; | |
51 | my $opt_max_dequeue = 1; | |
dff363d9 | 52 | my $opt_dequeue_time = 30; |
6f4aeba1 DM |
53 | |
54 | my $opt_ext_port = 10024; | |
55 | my $opt_int_port = 10023; | |
56 | my $opt_inject_port = 10025; | |
57 | ||
58 | my $opt_testmode; | |
59 | my $opt_untrusted; | |
60 | my $opt_pidfile; | |
61 | my $opt_database; | |
62 | ||
e646f7ca DM |
63 | my $prog_name = 'pmg-smtp-filter'; |
64 | ||
65 | initlog($prog_name, 'mail'); | |
6f4aeba1 DM |
66 | |
67 | if (!GetOptions ('testmode=s' => \$opt_testmode, | |
f62194b2 DM |
68 | 'pidfile=s' => \$opt_pidfile, |
69 | 'untrusted' => \$opt_untrusted, | |
6f4aeba1 DM |
70 | 'database=s' => \$opt_database)) { |
71 | die "usage error\n"; | |
72 | exit (-1); | |
73 | } | |
74 | ||
e646f7ca | 75 | $opt_pidfile = "/var/run/${prog_name}.pid" if !$opt_pidfile; |
6f4aeba1 DM |
76 | |
77 | my $max_servers = 1; | |
78 | my $min_servers = 1; | |
79 | my $min_spare_servers = 0; | |
80 | my $max_spare_servers = 0; | |
81 | my $max_requests = 1; | |
82 | ||
83 | if (!$opt_testmode) { | |
84 | ||
f62194b2 DM |
85 | my $pmg_cfg = PMG::Config->new(); |
86 | ||
ac5d1312 | 87 | my $demo = $pmg_cfg->get('admin', 'demo'); |
6f4aeba1 DM |
88 | |
89 | if ($demo) { | |
90 | syslog ('info', 'demo mode detected - not starting server'); | |
91 | exit (0); | |
92 | } | |
93 | ||
f62194b2 | 94 | $max_servers = $pmg_cfg->get('mail', 'max_filters') + 2; |
6f4aeba1 DM |
95 | $min_servers = 2; |
96 | $min_spare_servers = 1; | |
97 | $max_spare_servers = 4; | |
98 | $max_requests = 20; | |
99 | } | |
100 | ||
101 | $opt_max_dequeue = 0 if $opt_testmode; | |
102 | ||
103 | my $daemonize = 1; | |
104 | if (defined ($ENV{BOUND_SOCKETS})) { | |
105 | $daemonize = undef; | |
106 | } | |
107 | ||
108 | my $server_attr = { | |
109 | port => [ $opt_int_port, $opt_ext_port ], | |
110 | host => '127.0.0.1', | |
111 | min_servers => $min_servers, | |
112 | max_servers => $max_servers, | |
113 | min_spare_servers => $min_spare_servers, | |
114 | max_spare_servers => $max_spare_servers, | |
115 | max_requests => $max_requests, | |
116 | serialize => 'flock', | |
117 | max_dequeue => $opt_max_dequeue, | |
118 | check_for_dequeue => $opt_dequeue_time, | |
119 | log_level => 3, | |
120 | pid_file => $opt_pidfile, | |
121 | no_close_by_child => 1, | |
122 | no_client_stdout => 1, | |
123 | commandline => $opt_commandline, | |
124 | }; | |
125 | ||
126 | $server_attr->{setsid} = $daemonize if !$opt_testmode; | |
127 | ||
128 | my $database; | |
129 | ||
130 | if (defined($opt_database)) { | |
131 | $database = $opt_database; | |
132 | } else { | |
133 | $database = $opt_testmode ? "Proxmox_testdb" : "Proxmox_ruledb"; | |
134 | } | |
135 | ||
136 | $SIG{'__WARN__'} = sub { | |
137 | my $err = $@; | |
138 | my $t = $_[0]; | |
139 | chomp $t; | |
140 | syslog('warning', "WARNING: %s", $t); | |
141 | $@ = $err; | |
142 | }; | |
143 | ||
144 | sub get_prox_vars { | |
145 | my ($self, $queue, $entity, $msginfo, $rule, $targets, $spaminfo) = @_; | |
146 | ||
147 | $spaminfo = { | |
148 | sa_score => $queue->{sa_score}, | |
149 | sa_hits => $queue->{sa_hits}, | |
150 | sa_data => $queue->{sa_data}, | |
151 | sa_max => $queue->{sa_max} | |
152 | } if !$spaminfo; | |
153 | ||
154 | my $vars = { | |
155 | 'SUBJECT' => $entity->head->get ('subject', 0) || 'No Subject', | |
156 | 'RULE' => $rule->{name}, | |
157 | 'RULE_INFO' => $msginfo->{rule_info}, | |
158 | 'SENDER' => $msginfo->{sender}, | |
159 | 'SENDER_IP' => $msginfo->{xforward}->{addr}, | |
160 | 'TARGETS' => join (', ', @$targets), | |
161 | 'RECEIVERS' => join (', ', @{$msginfo->{targets}}), | |
162 | 'SPAMLEVEL' => $spaminfo->{sa_score}, | |
163 | 'SPAMSTARS' => '*' x (($spaminfo->{sa_score} || 0) > 100 ? 100 : $spaminfo->{sa_score} || 0), | |
ac5d1312 | 164 | 'ADMIN' => $self->{pmg_cfg}->get('admin', 'email'), |
6f4aeba1 DM |
165 | 'HOST' => $msginfo->{hostname}, |
166 | 'DOMAIN' => $msginfo->{domain}, | |
167 | 'FQDN' => $msginfo->{fqdn}, | |
168 | 'MSGID' => $queue->{msgid}, | |
f62194b2 | 169 | 'VERSION' => PMG::pmgcfg::package() . "/" . PMG::pmgcfg::version() . "/" . PMG::pmgcfg::repoid(), |
6f4aeba1 DM |
170 | }; |
171 | ||
172 | $vars->{__spaminfo} = $spaminfo; | |
173 | ||
174 | if ($opt_testmode) { | |
4c4fec6b | 175 | if ($queue->{vinfo_clam} || $queue->{vinfo_avast} || $queue->{vinfo_custom}) { |
6f4aeba1 DM |
176 | $vars->{'VIRUS_INFO'} = "Virus Info:"; |
177 | $vars->{'VIRUS_INFO'} .= " clam: $queue->{vinfo_clam}" if $queue->{vinfo_clam}; | |
6ccbc37f | 178 | $vars->{'VIRUS_INFO'} .= " avast: $queue->{vinfo_avast}" if $queue->{vinfo_avast}; |
4c4fec6b | 179 | $vars->{'VIRUS_INFO'} .= " custom: $queue->{vinfo_custom}" if $queue->{vinfo_custom}; |
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, |
ecf08b56 | 356 | $msginfo, { RULE => 'default-accept' }, undef); |
6f4aeba1 DM |
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 | $self->{cinfo} = PVE::INotify::read_file("cluster.conf"); | |
6f4aeba1 | 374 | |
ab6aa17b DM |
375 | # create spool directories |
376 | PMG::MailQueue::create_spooldirs($self->{cinfo}->{local}->{cid}); | |
377 | ||
6f4aeba1 | 378 | eval { |
f62194b2 DM |
379 | my $dbh = PMG::DBTools::open_ruledb ($database); |
380 | $self->{ruledb} = PMG::RuleDB->new ($dbh); | |
6f4aeba1 DM |
381 | |
382 | # load rulecache | |
f62194b2 | 383 | $self->{rulecache} = PMG::RuleCache->new ($self->{ruledb}); |
6f4aeba1 DM |
384 | }; |
385 | ||
386 | my $err = $@; | |
387 | ||
388 | if ($err) { | |
389 | sleep (10); # reduce restart rate when postgres is down | |
390 | die $err; | |
391 | } | |
392 | ||
f62194b2 | 393 | # create LDAP object |
7b3c53bd DM |
394 | my $ldapconf = PVE::INotify::read_file('pmg-ldap.conf'); |
395 | $self->{ldap} = PMG::LDAPSet->new_from_ldap_cfg($ldapconf, 1); | |
6f4aeba1 | 396 | |
f62194b2 | 397 | $self->{reload_config} = 0; |
6f4aeba1 DM |
398 | } |
399 | ||
f62194b2 DM |
400 | my $syslog_map = { |
401 | 0 => 'err', | |
402 | 1 => 'warning', | |
403 | 2 => 'notice', | |
404 | 3 => 'info', | |
405 | 4 => 'debug' | |
406 | }; | |
407 | ||
6f4aeba1 DM |
408 | sub log { |
409 | my ($self, $level, $msg, @therest) = @_; | |
410 | my $prop = $self->{server}; | |
411 | ||
412 | return if $level =~ /^\d+$/ && $level > $prop->{log_level}; | |
413 | ||
f62194b2 | 414 | $level = $syslog_map->{$level} || $level; |
6f4aeba1 DM |
415 | if (@therest) { |
416 | syslog($level, $msg, @therest); | |
417 | } else { | |
418 | syslog ($level, $msg); | |
419 | } | |
420 | } | |
421 | ||
422 | sub pre_loop_hook { | |
423 | my $self = shift; | |
424 | my $prop = $self->{server}; | |
425 | ||
426 | $prop->{log_level} = 3; | |
427 | ||
428 | $self->log (0, "Filter daemon (re)started (max. $max_servers processes)"); | |
429 | ||
521dca53 | 430 | eval { PMG::MailQueue::cleanup_active(); }; |
6f4aeba1 DM |
431 | $self->log (0, "Cleanup failures: $@") if $@; |
432 | ||
433 | my $sig_set = POSIX::SigSet->new; | |
f62194b2 DM |
434 | $sig_set->addset (&POSIX::SIGHUP); |
435 | $sig_set->addset (&POSIX::SIGCHLD); | |
6f4aeba1 DM |
436 | my $old_sig_set = POSIX::SigSet->new(); |
437 | ||
438 | sigprocmask (SIG_UNBLOCK, $sig_set, $old_sig_set); | |
439 | ||
440 | my ($backup_umask) = umask; | |
441 | ||
f62194b2 DM |
442 | my $pmg_cfg = PMG::Config->new(); |
443 | ||
444 | # Note: you need to restart the daemon when you change 'rbl_checks' | |
445 | my $rbl_checks = $pmg_cfg->get('spam', 'rbl_checks'); | |
6f4aeba1 DM |
446 | |
447 | $self->{sa} = Mail::SpamAssassin->new ({ | |
448 | debug => 0, | |
f62194b2 | 449 | local_tests_only => $opt_testmode || !$rbl_checks, |
6f4aeba1 DM |
450 | home_dir_for_helpers => '/root', |
451 | userstate_dir => '/root/.spamassassin', | |
452 | dont_copy_prefs => 1, | |
453 | stop_at_threshold => 0, | |
454 | }); | |
455 | ||
456 | $self->{sa}->compile_now; | |
457 | ||
458 | alarm (0); # SA forgets to clear alarm in some cases | |
459 | umask ($backup_umask); | |
e646f7ca | 460 | initlog ($prog_name, 'mail'); |
6f4aeba1 DM |
461 | |
462 | $SIG{'USR1'} = sub { | |
463 | # reloading server configuration | |
464 | if (defined $prop->{children}) { | |
465 | foreach my $pid (keys %{$prop->{children}}) { | |
466 | kill (10, $pid); # SIGUSR1 childs | |
467 | } | |
468 | } | |
469 | } | |
470 | } | |
471 | ||
472 | sub child_init_hook { | |
473 | my $self = shift; | |
474 | ||
e646f7ca | 475 | $0 = "$prog_name child"; |
6f4aeba1 DM |
476 | |
477 | # $self->log (3, "init child"); | |
478 | ||
479 | eval { | |
480 | $self->load_config (); | |
481 | }; | |
482 | ||
483 | if ($@) { | |
484 | $self->log (0, $@); | |
485 | $self->child_finish_hook; | |
486 | exit; | |
487 | } | |
488 | ||
489 | $SIG{'USR1'} = sub { | |
f62194b2 | 490 | $self->{reload_config} = 1; |
6f4aeba1 DM |
491 | } |
492 | } | |
493 | ||
494 | sub child_finish_hook { | |
495 | my $self = shift; | |
f62194b2 | 496 | |
6f4aeba1 DM |
497 | # $self->log (3, "finish child"); |
498 | $self->{ruledb}->close () if $self->{ruledb}; | |
499 | } | |
500 | ||
dff363d9 DM |
501 | my $last_dequeue_time = 0; |
502 | ||
6f4aeba1 DM |
503 | sub run_dequeue { |
504 | my $self = shift; | |
505 | ||
dff363d9 DM |
506 | my $err; |
507 | ||
6f4aeba1 DM |
508 | # do database maintainance here |
509 | ||
de199535 | 510 | # this is called every 30 secends |
dff363d9 DM |
511 | eval { |
512 | PMG::Utils::update_node_status_rrd(); | |
513 | }; | |
514 | if ($err = $@) { | |
b902c0b8 | 515 | $self->log(0, "ERROR: $err"); |
dff363d9 DM |
516 | # continue |
517 | } | |
518 | ||
de199535 DM |
519 | my $ctime = time(); |
520 | my $tdiff = $ctime - $last_dequeue_time; | |
521 | ||
522 | # return if tdiff less than 2 minutes | |
dff363d9 DM |
523 | return if $tdiff < 2*60; |
524 | ||
de199535 DM |
525 | $last_dequeue_time = $ctime; |
526 | ||
6f4aeba1 DM |
527 | $self->log (2, "starting database maintainance"); |
528 | ||
529 | my ($csec, $usec) = gettimeofday (); | |
530 | ||
f62194b2 DM |
531 | my $cinfo = PVE::INotify::read_file("cluster.conf"); |
532 | ||
6f4aeba1 | 533 | my $dbh; |
f62194b2 | 534 | |
6f4aeba1 | 535 | eval { |
f62194b2 | 536 | $dbh = PMG::DBTools::open_ruledb($database); |
6f4aeba1 | 537 | }; |
dff363d9 | 538 | if ($err = $@) { |
b902c0b8 | 539 | $self->log (0, "ERROR: $err"); |
6f4aeba1 DM |
540 | return; |
541 | } | |
542 | ||
543 | eval { | |
521dca53 | 544 | PMG::Statistic::update_stats($dbh, $cinfo); |
6f4aeba1 | 545 | }; |
6f4aeba1 DM |
546 | $err = $@; |
547 | ||
548 | my ($csec_end, $usec_end) = gettimeofday (); | |
549 | my $ptime = int (($csec_end-$csec)*1000 + ($usec_end - $usec)/1000); | |
550 | ||
551 | if ($err) { | |
b902c0b8 | 552 | $self->log (0, $err); |
6f4aeba1 DM |
553 | } else { |
554 | $self->log (2, "end database maintainance ($ptime ms)"); | |
555 | } | |
556 | ||
557 | $dbh->disconnect() if $dbh; | |
558 | } | |
559 | ||
560 | ||
561 | sub unpack_entity { | |
562 | my ($self, $unpack, $entity, $msginfo, $queue) = @_; | |
563 | ||
564 | my $magic; | |
565 | my $path; | |
566 | ||
f62194b2 | 567 | if (($magic = $entity->{PMX_magic_ct}) && |
6f4aeba1 DM |
568 | ($path = $entity->{PMX_decoded_path})) { |
569 | ||
570 | my $filename = basename ($path); | |
571 | ||
521dca53 | 572 | if (PMG::Unpack::is_archive ($magic)) { |
6f4aeba1 DM |
573 | $self->log (3, "$queue->{logid}: found archive '$filename' ($magic)"); |
574 | ||
575 | my $start = [gettimeofday]; | |
576 | ||
577 | $unpack->{mime} = {}; | |
578 | ||
f62194b2 DM |
579 | eval { |
580 | $unpack->unpack_archive ($path, $magic); | |
6f4aeba1 DM |
581 | }; |
582 | ||
583 | $self->log (3, "$queue->{logid}: unpack failed - $@") if $@; | |
584 | ||
585 | $entity->{PMX_content_types} = $unpack->{mime}; | |
f62194b2 | 586 | |
6f4aeba1 DM |
587 | if ($opt_testmode) { |
588 | my $types = join (", ", sort keys (%{$entity->{PMX_content_types}})); | |
589 | my $fh = $msginfo->{test_fh}; | |
590 | $filename =~ s/\d+/X/g if $filename =~ m/^msg-\d+-\d+.msg/; | |
591 | print $fh "Types:$filename: $types\n" if $types; | |
592 | } | |
593 | ||
594 | my $elapsed = int(tv_interval ($start) * 1000); | |
595 | ||
596 | $self->log (3, "$queue->{logid}: unpack archive '$filename' done ($elapsed ms)"); | |
597 | } | |
598 | } | |
599 | ||
600 | foreach my $part ($entity->parts) { | |
601 | $self->unpack_entity ($unpack, $part, $msginfo, $queue); | |
602 | } | |
603 | ||
604 | } | |
605 | ||
606 | sub handle_smtp { | |
607 | my ($self, $smtp) = @_; | |
608 | ||
609 | my ($csec, $usec) = gettimeofday (); | |
610 | ||
611 | my $queue; | |
612 | my $msginfo = {}; | |
f62194b2 | 613 | my $pmg_cfg = $self->{pmg_cfg}; |
6f4aeba1 DM |
614 | my $ldap = $self->{ldap}; |
615 | my $cinfo = $self->{cinfo}; | |
616 | my $lcid = $cinfo->{local}->{cid}; | |
f62194b2 DM |
617 | |
618 | $msginfo->{test_fh} = PMG::AtomicFile->new("testresult.out", "w") | |
6f4aeba1 DM |
619 | if $opt_testmode; |
620 | ||
621 | $msginfo->{trusted} = $self->{trusted}; | |
622 | ||
623 | ||
624 | # PHASE 1 - save incoming mail (already done) | |
625 | # on error: exit | |
626 | ||
627 | $queue = $smtp->{queue}; | |
628 | $queue->{sa} = $self->{sa}; | |
cda67dee DM |
629 | $queue->{clamav_heuristic_score} = |
630 | $opt_testmode ? 100 : $pmg_cfg->get('spam', 'clamav_heuristic_score'); | |
6f4aeba1 | 631 | |
f62194b2 | 632 | $queue->{lic_valid} = 1; |
6f4aeba1 DM |
633 | |
634 | my $matching_rules; | |
635 | ||
636 | eval { | |
637 | $msginfo->{testmode} = $opt_testmode; | |
638 | $msginfo->{sender} = $smtp->{from}; | |
639 | $msginfo->{xforward} = $smtp->{xforward}; | |
640 | $msginfo->{targets} = $smtp->{to}; | |
641 | ||
f62194b2 DM |
642 | $msginfo->{hostname} = PVE::INotify::nodename(); |
643 | my $resolv = PVE::INotify::read_file('resolvconf'); | |
644 | ||
645 | $msginfo->{domain} = $resolv->{search}; | |
6f4aeba1 DM |
646 | $msginfo->{fqdn} = "$msginfo->{hostname}.$msginfo->{domain}"; |
647 | $msginfo->{lcid} = $lcid; | |
f62194b2 | 648 | |
6f4aeba1 DM |
649 | # $msginfo->{targets} is case sensitive, |
650 | # but pmail is always lower case! | |
651 | ||
652 | foreach my $t (@{$msginfo->{targets}}) { | |
653 | my $res; | |
654 | if ($ldap && ($res = $ldap->account_info ($t))) { | |
655 | $msginfo->{pmail}->{$t} = $res->{pmail}; | |
656 | } else { | |
657 | $msginfo->{pmail}->{$t} = lc ($t); | |
658 | } | |
659 | } | |
660 | ||
661 | # PHASE 2 - parse mail | |
662 | # on error: exit | |
6f4aeba1 | 663 | |
f62194b2 DM |
664 | my $maxfiles = $pmg_cfg->get('clamav', 'archivemaxfiles'); |
665 | ||
666 | my $entity = $queue->parse_mail($maxfiles); | |
6f4aeba1 DM |
667 | |
668 | $self->log (3, "$queue->{logid}: new mail message-id=%s", $queue->{msgid}); | |
669 | ||
670 | # PHASE 3 - run external content analyzers | |
671 | # (SPAM analyzer is run on demand later) | |
672 | # on error: log error messages | |
673 | ||
4c4fec6b SI |
674 | # run custom script first |
675 | my ($vinfo, $custom_spaminfo) = PMG::Utils::analyze_custom_check( | |
f62194b2 | 676 | $queue, $queue->{dataname}, $pmg_cfg, $opt_testmode); |
6f4aeba1 | 677 | |
4c4fec6b SI |
678 | # test for virus if none found |
679 | if (!defined($vinfo)) { | |
680 | $vinfo = PMG::Utils::analyze_virus( | |
681 | $queue, $queue->{dataname}, $pmg_cfg, $opt_testmode); | |
0d5209bf | 682 | |
4c4fec6b SI |
683 | if ($vinfo && $vinfo =~ m/^Heuristics\.(.+)$/) { |
684 | my $hit = $1; | |
685 | $queue->{clamav_heuristic} = $hit; | |
686 | $vinfo = undef; | |
687 | } | |
688 | } | |
0d5209bf DM |
689 | $queue->{vinfo} = $vinfo; |
690 | ||
6f4aeba1 DM |
691 | # always add this headers to incoming mails |
692 | # to enable user to report false negatives | |
693 | if (!$msginfo->{trusted}) { | |
6f4aeba1 DM |
694 | if ($queue->{vinfo}) { |
695 | $entity->head->replace('X-Proxmox-VInfo', $queue->{vinfo}); | |
696 | } | |
6f4aeba1 DM |
697 | } |
698 | ||
699 | # we unpack after virus scanning, because this is more secure. | |
700 | # This way virus scanners gets the whole mail files and are able | |
701 | # to detect phishing signature for example - which would not work | |
702 | # if we decompose first and only analyze the decomposed attachments. | |
f62194b2 | 703 | # Disadvantage is that we need to unpack more than |
6f4aeba1 | 704 | # once (bad performance). |
f62194b2 | 705 | |
6f4aeba1 DM |
706 | # should we scan content types inside archives |
707 | ||
6f4aeba1 DM |
708 | my $rulecache = $self->{rulecache}; |
709 | ||
710 | my $scan_archives = 0; | |
711 | ||
712 | if (($rulecache->{archivefilter_in} && !$msginfo->{trusted}) || | |
713 | ($rulecache->{archivefilter_out} && $msginfo->{trusted})) { | |
714 | $scan_archives = 1; | |
715 | } | |
716 | ||
717 | if ($scan_archives && !$queue->{vinfo}) { | |
718 | ||
719 | # unpack all archives - determine contained content types | |
720 | ||
721 | my $decdir = $queue->{dumpdir} . "/__decoded_archives"; | |
722 | mkdir $decdir; | |
723 | ||
724 | my $start = [gettimeofday]; | |
f62194b2 | 725 | |
6f4aeba1 DM |
726 | my $unpack; |
727 | eval { | |
728 | ||
729 | # limits: We use clamav limit for maxfiles, and scan | |
730 | # only 4 levels, timeout of 30 seconds | |
731 | ||
521dca53 DM |
732 | $unpack = PMG::Unpack->new ( |
733 | tmpdir => $decdir, | |
734 | timeout => 30, | |
735 | ctonly => 1, # only detect CTs | |
736 | maxrec => -4, | |
737 | maxfiles => $maxfiles); | |
6f4aeba1 | 738 | |
f62194b2 | 739 | $self->unpack_entity ($unpack, $entity, $msginfo, $queue); |
6f4aeba1 DM |
740 | }; |
741 | ||
742 | my $err = $@; | |
743 | ||
744 | $unpack->cleanup() if $unpack; | |
745 | ||
746 | my $elapsed = int(tv_interval ($start) * 1000); | |
747 | ||
748 | if ($err) { | |
749 | $self->log (3, "$queue->{logid}: unpack archive failed ($elapsed ms) - $err"); | |
750 | } | |
751 | } | |
752 | ||
753 | # PHASE 4 - apply rules | |
754 | # on error: exit (cleanup process should do the rest) | |
f62194b2 | 755 | $msginfo->{maxspamsize} = $pmg_cfg->get('spam', 'maxspamsize'); |
6f4aeba1 DM |
756 | if ($msginfo->{maxspamsize} <= 1024*64) { |
757 | $msginfo->{maxspamsize} = 1024*64; | |
758 | } | |
759 | ||
760 | if ($msginfo->{trusted}) { | |
f62194b2 | 761 | my $hide = $pmg_cfg->get('mail', 'hide_received'); |
6f4aeba1 DM |
762 | $entity->head->delete("Received") if $hide; |
763 | } | |
764 | ||
f62194b2 | 765 | $matching_rules = $self->apply_rules($queue, $msginfo, $entity, $ldap); |
6f4aeba1 | 766 | }; |
f62194b2 | 767 | |
6f4aeba1 DM |
768 | my $err = $@; |
769 | ||
770 | $self->{errors} = $queue->{errors}; | |
771 | ||
772 | # restart on error | |
773 | $self->{errors} = 1 if $err; | |
774 | ||
775 | $queue->close (); | |
776 | ||
777 | die $err if $err; | |
778 | ||
779 | my ($csec_end, $usec_end) = gettimeofday (); | |
f62194b2 | 780 | my $time_total = |
6f4aeba1 DM |
781 | int (($csec_end-$csec)*1000 + ($usec_end - $usec)/1000); |
782 | ||
783 | # PHASE 5 - log statistics | |
784 | # on error: log error messages | |
785 | ||
786 | eval { | |
787 | my $dbh = $self->{ruledb}->{dbh}; | |
2579281e | 788 | |
6f4aeba1 DM |
789 | my $where = ""; |
790 | foreach my $rid (@$matching_rules) { | |
791 | $where .= $where ? " OR ID = $rid" : "ID = $rid"; | |
792 | } | |
2579281e DM |
793 | |
794 | $dbh->do ("UPDATE Rule SET Count = Count + 1 WHERE $where") if $where; | |
6f4aeba1 DM |
795 | |
796 | my $insert_cmds = "SELECT nextval ('cstatistic_id_seq');INSERT INTO CStatistic " . | |
797 | "(CID, RID, ID, Time, Bytes, Direction, Spamlevel, VirusInfo, PTime, Sender) VALUES (" . | |
2579281e | 798 | "$lcid, currval('cstatistic_id_seq'), currval('cstatistic_id_seq'),"; |
6f4aeba1 DM |
799 | |
800 | $insert_cmds .= $queue->{rtime} . ','; | |
801 | $insert_cmds .= $queue->{bytes} . ','; | |
2579281e | 802 | $insert_cmds .= $dbh->quote($msginfo->{trusted} ? 0 : 1) . ','; |
6f4aeba1 | 803 | $insert_cmds .= ($queue->{sa_score} || 0) . ','; |
2579281e | 804 | $insert_cmds .= $dbh->quote($queue->{vinfo}) . ','; |
6f4aeba1 | 805 | $insert_cmds .= $time_total . ','; |
2579281e | 806 | $insert_cmds .= $dbh->quote($msginfo->{sender}) . ');'; |
6f4aeba1 DM |
807 | |
808 | foreach my $r (@{$msginfo->{targets}}) { | |
2579281e | 809 | my $tmp = $dbh->quote($r); |
6f4aeba1 DM |
810 | my $blocked = $queue->{status}->{$r} eq 'blocked' ? 1 : 0; |
811 | $insert_cmds .= "INSERT INTO CReceivers (CStatistic_CID, CStatistic_RID, Receiver, Blocked) " . | |
812 | "VALUES ($lcid, currval ('cstatistic_id_seq'), $tmp, '$blocked'); "; | |
813 | } | |
814 | ||
2579281e | 815 | $dbh->do($insert_cmds); |
6f4aeba1 | 816 | }; |
6f4aeba1 DM |
817 | # save $err (because log clears $@) |
818 | $err = $@; | |
819 | ||
820 | $time_total = $time_total/1000; | |
821 | ||
822 | my $ptspam = ($queue->{ptime_spam} || 0)/1000; | |
6f4aeba1 | 823 | my $ptclam = ($queue->{ptime_clam} || 0)/1000; |
4c4fec6b | 824 | my $ptcustom = ($queue->{ptime_custom} || 0)/1000; |
6f4aeba1 | 825 | |
4c4fec6b | 826 | $self->log(3, "$queue->{logid}: processing time: ${time_total} seconds ($ptspam, $ptclam, $ptcustom)"); |
6f4aeba1 DM |
827 | |
828 | $msginfo->{test_fh}->close if $opt_testmode; | |
829 | ||
2579281e | 830 | die $err if $err; |
6f4aeba1 DM |
831 | } |
832 | ||
ab6aa17b | 833 | my $initial_memory_usage; |
6f4aeba1 DM |
834 | |
835 | sub process_request { | |
836 | my $self = shift; | |
837 | my $prop = $self->{server}; | |
838 | my $sock = $prop->{client}; | |
839 | ||
840 | eval { | |
841 | ||
842 | # make sure the ldap cache is up to date | |
843 | $self->{ldap}->update (1); | |
844 | ||
f62194b2 | 845 | $self->load_config() if $self->{reload_config}; |
6f4aeba1 DM |
846 | |
847 | $self->{trusted} = 0; | |
848 | if ($prop->{sockport} == $opt_int_port && !$opt_untrusted) { | |
849 | $self->{trusted} = 1; | |
850 | } | |
851 | ||
521dca53 | 852 | my $smtp = PMG::SMTP->new ($sock); |
6f4aeba1 DM |
853 | |
854 | my $maxcount = $max_requests - $prop->{requests}; | |
855 | ||
856 | my $count = $smtp->loop (\&handle_smtp, $self, $maxcount); | |
857 | if ($count > 1) { | |
858 | $prop->{requests} += $count - 1; | |
859 | } | |
860 | }; | |
f62194b2 | 861 | |
6f4aeba1 DM |
862 | my $err = $@; |
863 | ||
864 | $self->log (0, $err) if $err; | |
865 | ||
24244199 | 866 | kill(15, $prop->{ppid}) if $opt_testmode; |
6f4aeba1 | 867 | |
f62194b2 | 868 | my $mem = PVE::ProcFSTools::read_memory_usage(); |
ab6aa17b DM |
869 | if (!defined($initial_memory_usage) || ($prop->{requests} < 10)) { |
870 | $initial_memory_usage = $mem->{resident}; | |
871 | } | |
6f4aeba1 DM |
872 | |
873 | if ($opt_testmode) { | |
874 | $self->log (0, "memory usage: $mem->{size} bytes"); | |
875 | } else { | |
876 | if ($self->{errors}) { | |
877 | $self->log (0, "fast exit because of errors (free $mem->{size} bytes)"); | |
878 | $self->done (1); | |
ab6aa17b DM |
879 | } else { |
880 | my $diff = $mem->{resident} - $initial_memory_usage; | |
881 | if ($diff > 5*1024*1024) { | |
882 | $self->log (0, "fast exit to reduce server load (free $diff bytes)"); | |
883 | $self->done (1); | |
884 | } | |
885 | } | |
6f4aeba1 DM |
886 | } |
887 | ||
888 | $self->done (1) if $err; | |
889 | } | |
890 | ||
e646f7ca | 891 | # test sig_hup with: for ((;;)) ;do kill -HUP `cat /var/run/${prog_name}.pid`; done; |
6f4aeba1 DM |
892 | # wrapper to avoid multiple calls to sig_hup |
893 | sub sig_hup { | |
894 | my $self = shift; | |
895 | my $prop = $self->{server}; | |
896 | ||
897 | return if defined ($prop->{_HUP}); # do not call twice | |
898 | ||
899 | $self->SUPER::sig_hup(); | |
900 | } | |
901 | ||
902 | sub restart_close_hook { | |
903 | my $self = shift; | |
904 | ||
905 | my $sig_set = POSIX::SigSet->new; | |
f62194b2 | 906 | $sig_set->addset (&POSIX::SIGHUP); |
6f4aeba1 DM |
907 | $sig_set->addset (&POSIX::SIGCHLD); # to avoid zombies |
908 | my $old_sig_set = POSIX::SigSet->new(); | |
909 | ||
910 | sigprocmask (SIG_BLOCK, $sig_set, $old_sig_set); | |
911 | } | |
912 | ||
913 | sub pre_server_close_hook { | |
914 | my $self = shift; | |
915 | my $prop = $self->{server}; | |
916 | ||
917 | if (defined $prop->{_HUP}) { | |
f62194b2 | 918 | undef $prop->{pid_file_unlink}; |
6f4aeba1 DM |
919 | } |
920 | ||
921 | if (defined $prop->{children}) { | |
922 | foreach my $pid (keys %{$prop->{children}}) { | |
923 | kill (1, $pid); # HUP childs | |
924 | } | |
925 | } | |
926 | ||
927 | # nicely shutdown childs (give them max 30 seconds to shut down) | |
08f49442 | 928 | my $previous_alarm = alarm(30); |
6f4aeba1 DM |
929 | eval { |
930 | local $SIG{ALRM} = sub { die "Timed Out!\n" }; | |
f62194b2 | 931 | |
6f4aeba1 DM |
932 | my $pid; |
933 | 1 while ((($pid = waitpid (-1, 0)) > 0) || ($! == EINTR)); | |
08f49442 DM |
934 | |
935 | alarm(0); # avoid race | |
6f4aeba1 DM |
936 | }; |
937 | alarm ($previous_alarm); | |
938 | } | |
939 | ||
940 | # initialize mime system before fork | |
941 | xdg_mime_get_mime_type_for_file ($0); | |
942 | ||
943 | my $server = bless { | |
944 | server => $server_attr, | |
945 | }; | |
946 | ||
947 | if (!$opt_testmode) { | |
948 | $server->run (); | |
949 | } else { | |
950 | if (fork) { | |
21853580 | 951 | $server->run(); |
6f4aeba1 | 952 | } else { |
21853580 | 953 | |
f62194b2 DM |
954 | my $sender ='sender@proxtest.com'; |
955 | my $targets = ['target1@proxtest.com', | |
6f4aeba1 DM |
956 | 'target2@proxtest.com', |
957 | 'target3@proxtest.com']; | |
958 | ||
21853580 DM |
959 | my $smtp; |
960 | while (!$smtp) { | |
961 | $smtp = Net::SMTP->new ('127.0.0.1', Port => 10023); | |
962 | last if $smtp; | |
963 | usleep(10); | |
964 | } | |
6f4aeba1 DM |
965 | |
966 | # syslog ('info', "connected to " . $smtp->domain); | |
967 | ||
968 | $smtp->mail ($sender); | |
969 | $smtp->to (@$targets); | |
970 | ||
971 | $smtp->data(); | |
972 | ||
f62194b2 DM |
973 | open (TMP, $opt_testmode) || |
974 | die "unable to upen file '$opt_testmode' - $! :ERROR"; | |
6f4aeba1 DM |
975 | while (<TMP>) { |
976 | $smtp->datasend ($_); | |
977 | } | |
978 | close TMP; | |
979 | ||
980 | $smtp->datasend ("\n"); | |
981 | $smtp->dataend (); | |
982 | ||
983 | $smtp->quit; | |
984 | } | |
985 | } | |
986 | ||
987 | exit (0); | |
988 | ||
989 | __END__ | |
990 | ||
991 | =head1 NAME | |
f62194b2 DM |
992 | |
993 | pmg-smtp-filter - the Proxmox mail filter | |
6f4aeba1 DM |
994 | |
995 | =head1 SYNOPSIS | |
996 | ||
f62194b2 | 997 | pmg-smtp-filter [-u] [-t testfile] |
6f4aeba1 DM |
998 | |
999 | =head1 DESCRIPTION | |
1000 | ||
1001 | Documentation is available at www.proxmox.com |