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Commit | Line | Data |
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3164123a | 1 | #!/usr/bin/perl |
ddaec666 DM |
2 | |
3 | use strict; | |
3164123a | 4 | use warnings; |
ddaec666 | 5 | use Getopt::Long; |
ddaec666 DM |
6 | use POSIX qw(errno_h signal_h); |
7 | ||
8 | use Net::Server::PreForkSimple; | |
9 | use Net::DNS::Resolver; | |
10 | use Mail::SPF; | |
11 | use Fcntl; | |
12 | use Fcntl ':flock'; | |
13 | use IO::Multiplex; | |
3164123a | 14 | use Time::HiRes qw(gettimeofday); |
e189e2d2 | 15 | use Time::Zone; |
ddaec666 | 16 | |
3164123a DM |
17 | use PVE::INotify; |
18 | use PVE::Tools; | |
19 | use PVE::SafeSyslog; | |
ddaec666 | 20 | |
3164123a DM |
21 | use PMG::Utils; |
22 | use PMG::RuleDB; | |
23 | use PMG::DBTools; | |
24 | use PMG::RuleCache; | |
25 | use PMG::Config; | |
26 | use PMG::ClusterConfig; | |
27 | ||
28 | use base qw(Net::Server::PreForkSimple); | |
ddaec666 DM |
29 | |
30 | my $greylist_delay = 3*60; # greylist window | |
31 | my $greylist_lifetime = 3600*24*2; # retry window | |
32 | my $greylist_awlifetime = 3600*24*36; # expire window | |
33 | ||
34 | my $opt_commandline = [$0, @ARGV]; | |
35 | my $opt_policy_port = 10022; | |
36 | my $opt_max_dequeue = 1; | |
37 | my $opt_dequeue_time = 60*2; | |
38 | ||
39 | my $opt_testmode; | |
40 | my $opt_pidfile; | |
41 | my $opt_database; | |
42 | ||
3164123a DM |
43 | if (!GetOptions ('pidfile=s' => \$opt_pidfile, |
44 | 'testmode' => \$opt_testmode, | |
ddaec666 DM |
45 | 'database=s' => \$opt_database)) { |
46 | die "usage error\n"; | |
47 | exit (-1); | |
48 | } | |
49 | ||
3164123a | 50 | $opt_pidfile = "/var/run/pmgpolicy.pid" if !$opt_pidfile; |
ddaec666 DM |
51 | $opt_max_dequeue = 0 if $opt_testmode; |
52 | ||
3164123a DM |
53 | initlog('pmgpolicy', 'mail'); |
54 | ||
55 | my $max_servers = 5; | |
ddaec666 DM |
56 | |
57 | if (!$opt_testmode) { | |
58 | ||
3164123a DM |
59 | my $pmg_cfg = PMG::Config->new (); |
60 | my $demo = $pmg_cfg->get('admin', 'demo'); | |
61 | $max_servers = $pmg_cfg->get('mail', 'max_policy'); | |
ddaec666 DM |
62 | |
63 | if ($demo) { | |
3164123a DM |
64 | syslog('info', 'demo mode detected - not starting server'); |
65 | exit(0); | |
ddaec666 DM |
66 | } |
67 | } | |
68 | ||
69 | my $daemonize = 1; | |
70 | if (defined ($ENV{BOUND_SOCKETS})) { | |
71 | $daemonize = undef; | |
72 | } | |
73 | ||
ddaec666 DM |
74 | |
75 | my $server_attr = { | |
76 | port => [ $opt_policy_port ], | |
77 | host => '127.0.0.1', | |
78 | max_servers => $max_servers, | |
79 | max_dequeue => $opt_max_dequeue, | |
80 | check_for_dequeue => $opt_dequeue_time, | |
81 | log_level => 3, | |
82 | pid_file => $opt_pidfile, | |
83 | commandline => $opt_commandline, | |
84 | no_close_by_child => 1, | |
85 | setsid => $daemonize, | |
86 | }; | |
87 | ||
88 | my $database; | |
89 | if (defined($opt_database)) { | |
90 | $database = $opt_database; | |
91 | } else { | |
92 | $database = "Proxmox_ruledb"; | |
93 | } | |
94 | ||
95 | $SIG{'__WARN__'} = sub { | |
96 | my $err = $@; | |
97 | my $t = $_[0]; | |
98 | chomp $t; | |
99 | syslog('warning', "WARNING: %s", $t); | |
100 | $@ = $err; | |
101 | }; | |
102 | ||
e189e2d2 DM |
103 | sub update_rbl_stats { |
104 | my ($dbh, $lcid) = @_; | |
105 | ||
2e0e3415 DM |
106 | my ($rbl_count, $pregreet_count) = PMG::Utils::scan_journal_for_rbl_rejects(); |
107 | return if !$rbl_count && !$pregreet_count; | |
e189e2d2 DM |
108 | |
109 | my $timezone = tz_local_offset();; | |
110 | my $hour = int((time() + $timezone)/3600) * 3600; | |
111 | ||
112 | my $sth = $dbh->prepare( | |
2e0e3415 DM |
113 | 'INSERT INTO LocalStat (Time, RBLCount, PregreetCount, CID, MTime) ' . |
114 | 'VALUES (?, ?, ?, ?, EXTRACT(EPOCH FROM now())) ' . | |
e189e2d2 DM |
115 | 'ON CONFLICT (Time, CID) DO UPDATE SET ' . |
116 | 'RBLCount = LocalStat.RBLCount + excluded.RBLCount, ' . | |
2e0e3415 | 117 | 'PregreetCount = LocalStat.PregreetCount + excluded.PregreetCount, ' . |
e189e2d2 DM |
118 | 'MTime = excluded.MTime'); |
119 | ||
2e0e3415 | 120 | $sth->execute($hour, $rbl_count, $pregreet_count, $lcid); |
e189e2d2 DM |
121 | $sth->finish(); |
122 | }; | |
123 | ||
ddaec666 DM |
124 | sub run_dequeue { |
125 | my $self = shift; | |
126 | ||
e189e2d2 | 127 | $self->log(2, "starting policy database maintainance (greylist, rbl)"); |
ddaec666 | 128 | |
cff666e6 | 129 | my $cinfo = PMG::ClusterConfig->new(); |
ddaec666 | 130 | my $lcid = $cinfo->{local}->{cid}; |
3164123a DM |
131 | my $role = $cinfo->{local}->{type} // '-'; |
132 | ||
ddaec666 | 133 | my $dbh; |
3164123a | 134 | |
ddaec666 | 135 | eval { |
3164123a | 136 | $dbh = PMG::DBTools::open_ruledb($database); |
ddaec666 DM |
137 | }; |
138 | my $err = $@; | |
139 | ||
140 | if ($err) { | |
b902c0b8 | 141 | $self->log(0, "ERROR: $err"); |
ddaec666 DM |
142 | return; |
143 | } | |
144 | ||
e189e2d2 DM |
145 | my ($csec, $usec) = gettimeofday (); |
146 | ||
147 | eval { update_rbl_stats($dbh, $lcid); }; | |
148 | $err = $@; | |
149 | ||
150 | my ($csec_end, $usec_end) = gettimeofday (); | |
151 | my $rbltime = int (($csec_end-$csec)*1000 + ($usec_end - $usec)/1000); | |
152 | ($csec, $usec) = ($csec_end, $usec_end); | |
153 | ||
154 | if ($err) { | |
155 | $self->log(0, "rbl update error: $err"); | |
156 | # continue; | |
157 | } | |
158 | ||
3164123a | 159 | my $now = time(); |
ddaec666 DM |
160 | |
161 | my $ecount = 0; | |
162 | ||
ddaec666 DM |
163 | eval { |
164 | ||
165 | $dbh->begin_work; | |
166 | ||
167 | # we do not lock the table here to avoid delays | |
168 | # but that is OK, because we only touch expired records | |
169 | # which do not change nornmally | |
170 | ## $dbh->do ("LOCK TABLE CGreylist IN ROW EXCLUSIVE MODE"); | |
171 | ||
172 | # move expired and undelivered records from Greylist to Statistic | |
3164123a | 173 | |
ddaec666 | 174 | my $rntxt = ''; |
3164123a | 175 | if (!$lcid) { |
ddaec666 DM |
176 | $rntxt = "AND CID = 0"; |
177 | } else { | |
3164123a | 178 | if ($role eq 'master') { |
ddaec666 DM |
179 | # master is responsible for all non-cluster (deleted) nodes |
180 | foreach my $rcid (@{$cinfo->{remnodes}}) { | |
181 | $rntxt .= $rntxt ? " AND CID != $rcid" : "AND (CID != $rcid"; | |
182 | } | |
183 | $rntxt .= ")" if $rntxt; | |
184 | } else { | |
185 | $rntxt = "AND (CID = 0 OR CID = $lcid)"; | |
186 | } | |
187 | } | |
188 | ||
189 | ||
190 | my $cmds = ''; | |
191 | ||
3164123a DM |
192 | my $sth = $dbh->prepare( |
193 | "SELECT distinct instance, sender FROM CGreylist " . | |
194 | "WHERE passed = 0 AND extime < ? $rntxt"); | |
ddaec666 DM |
195 | |
196 | $sth->execute ($now); | |
197 | ||
198 | ||
199 | while (my $ref = $sth->fetchrow_hashref()) { | |
3164123a DM |
200 | my $sth2 = $dbh->prepare( |
201 | "SELECT * FROM CGreylist WHERE instance = ? AND sender = ?"); | |
ddaec666 DM |
202 | $sth2->execute ($ref->{instance}, $ref->{sender}); |
203 | my $rctime; | |
204 | my @rcvrs; | |
205 | my $bc = 0; | |
206 | ||
207 | while (my $ref2 = $sth2->fetchrow_hashref()) { | |
208 | $rctime = $ref2->{rctime} if !$rctime; | |
209 | $bc += $ref2->{blocked}; | |
210 | push @rcvrs, $ref2->{receiver}; | |
211 | } | |
212 | ||
213 | $sth2->finish(); | |
214 | ||
215 | # hack: sometimes query sth2 does not return anything - maybe a | |
216 | # postgres bug? We simply ignore (when rctime is undefined) it | |
217 | # to avoid problems. | |
218 | ||
219 | if ($rctime) { | |
3164123a DM |
220 | $cmds .= "SELECT nextval ('cstatistic_id_seq');" . |
221 | "INSERT INTO CStatistic " . | |
ddaec666 DM |
222 | "(CID, RID, ID, Time, Bytes, Direction, Spamlevel, VirusInfo, PTime, Sender) VALUES (" . |
223 | "$lcid, currval ('cstatistic_id_seq'), currval ('cstatistic_id_seq'), "; | |
224 | ||
225 | my $sl = $bc >= 100000 ? 4 : 5; | |
226 | $cmds .= $rctime . ", 0, '1', $sl, NULL, 0, "; | |
227 | $cmds .= $dbh->quote ($ref->{sender}) . ');'; | |
228 | ||
229 | foreach my $r (@rcvrs) { | |
230 | my $tmp = $dbh->quote ($r); | |
231 | $cmds .= "INSERT INTO CReceivers (CStatistic_CID, CStatistic_RID, Receiver, Blocked) ". | |
232 | "VALUES ($lcid, currval ('cstatistic_id_seq'), $tmp, '1'); "; | |
233 | } | |
234 | } | |
235 | ||
236 | if (length ($cmds) > 100000) { | |
237 | $dbh->do ($cmds); | |
238 | $cmds = ''; | |
239 | } | |
240 | ||
ddaec666 DM |
241 | $ecount++; |
242 | ||
243 | # this produces too much log traffic | |
244 | # my $targets = join (", ", @rcvrs); | |
245 | #my $msg = "expire mail $ref->{instance} from $ref->{sender} to $targets"; | |
b902c0b8 | 246 | #$self->log (0, $msg); |
ddaec666 DM |
247 | } |
248 | ||
249 | $dbh->do ($cmds) if $cmds; | |
250 | ||
251 | $sth->finish(); | |
252 | ||
253 | if ($ecount > 0) { | |
254 | my $msg = "found $ecount expired mails in greylisting database"; | |
255 | $self->log (0, $msg); | |
256 | } | |
257 | ||
258 | $dbh->do ("DELETE FROM CGreylist WHERE extime < $now"); | |
259 | ||
260 | $dbh->commit; | |
261 | }; | |
ddaec666 DM |
262 | $err = $@; |
263 | ||
e189e2d2 | 264 | ($csec_end, $usec_end) = gettimeofday (); |
ddaec666 DM |
265 | my $ptime = int (($csec_end-$csec)*1000 + ($usec_end - $usec)/1000); |
266 | ||
267 | if ($err) { | |
268 | $dbh->rollback if $dbh; | |
e189e2d2 | 269 | $self->log(0, "greylist database update error: $err"); |
ddaec666 DM |
270 | } |
271 | ||
e189e2d2 DM |
272 | $self->log(2, "end policy database maintainance ($rbltime ms, $ptime ms)"); |
273 | ||
ddaec666 DM |
274 | $dbh->disconnect() if $dbh; |
275 | } | |
276 | ||
277 | sub pre_loop_hook { | |
3164123a | 278 | my $self = shift; |
ddaec666 | 279 | |
3164123a | 280 | my $prop = $self->{server}; |
ddaec666 | 281 | |
3164123a | 282 | $prop->{log_level} = 3; |
ddaec666 | 283 | |
3164123a | 284 | $self->log(0, "Policy daemon (re)started"); |
ddaec666 | 285 | |
3164123a DM |
286 | $SIG{'USR1'} = sub { |
287 | # reloading server configuration | |
288 | if (defined $prop->{children}) { | |
289 | foreach my $pid (keys %{$prop->{children}}) { | |
08f49442 | 290 | kill(10, $pid); # SIGUSR1 childs |
3164123a DM |
291 | } |
292 | } | |
293 | }; | |
ddaec666 | 294 | |
3164123a DM |
295 | my $sig_set = POSIX::SigSet->new; |
296 | $sig_set->addset (&POSIX::SIGHUP); | |
297 | $sig_set->addset (&POSIX::SIGCHLD); | |
298 | my $old_sig_set = POSIX::SigSet->new(); | |
299 | ||
300 | sigprocmask (SIG_UNBLOCK, $sig_set, $old_sig_set); | |
ddaec666 DM |
301 | } |
302 | ||
303 | sub load_config { | |
3164123a | 304 | my $self = shift; |
ddaec666 | 305 | |
3164123a | 306 | my $prop = $self->{server}; |
ddaec666 | 307 | |
3164123a DM |
308 | if ($self->{ruledb}) { |
309 | $self->log(0, "reloading configuration $database"); | |
310 | $self->{ruledb}->close(); | |
311 | } | |
ddaec666 | 312 | |
3164123a | 313 | my $pmg_cfg = PMG::Config->new (); |
3164123a DM |
314 | $self->{use_spf} = $pmg_cfg->get('mail', 'spf'); |
315 | $self->{use_greylist} = $pmg_cfg->get('mail', 'greylist'); | |
ddaec666 | 316 | |
1dc67c8f DM |
317 | if ($opt_testmode) { |
318 | $self->{use_spf} = 1; | |
319 | $self->{use_greylist} = 1; | |
320 | } | |
321 | ||
3164123a | 322 | my $nodename = PVE::INotify::nodename(); |
4bb79830 | 323 | $self->{fqdn} = PVE::Tools::get_fqdn($nodename); |
ddaec666 | 324 | |
cff666e6 | 325 | my $cinfo = PMG::ClusterConfig->new(); |
3164123a DM |
326 | my $lcid = $cinfo->{local}->{cid}; |
327 | $self->{cinfo} = $cinfo; | |
328 | $self->{lcid} = $lcid; | |
ddaec666 | 329 | |
3164123a | 330 | my $dbh; |
ddaec666 | 331 | |
3164123a DM |
332 | eval { |
333 | $dbh = PMG::DBTools::open_ruledb($database); | |
334 | $self->{ruledb} = PMG::RuleDB->new($dbh); | |
335 | $self->{rulecache} = PMG::RuleCache->new($self->{ruledb}); | |
336 | }; | |
337 | if (my $err = $@) { | |
b902c0b8 | 338 | $self->log(0, "ERROR: unable to load database : $err"); |
3164123a | 339 | } |
ddaec666 | 340 | |
3164123a DM |
341 | $self->{reload_config} = 0; |
342 | } | |
ddaec666 | 343 | |
3164123a DM |
344 | sub child_init_hook { |
345 | my $self = shift; | |
346 | ||
347 | my $prop = $self->{server}; | |
ddaec666 | 348 | |
3164123a | 349 | $0 = 'pmgpolicy child'; |
ddaec666 | 350 | |
3164123a DM |
351 | setup_fork_signal_mask(0); # unblocking signals for children |
352 | ||
353 | eval { | |
354 | $self->load_config(); | |
355 | ||
356 | $self->{mux} = IO::Multiplex->new(); | |
357 | $self->{mux}->set_callback_object($self); | |
358 | ||
359 | my %dnsargs = ( | |
360 | tcp_timeout => 3, | |
361 | udp_timeout => 3, | |
362 | retry => 1, | |
363 | retrans => 0, | |
364 | dnsrch => 0, | |
365 | defnames => 0, | |
366 | ); | |
367 | ||
368 | if ($opt_testmode) { | |
369 | # $dnsargs{nameservers} = [ qw (213.129.232.1 213.129.226.2) ]; | |
370 | } | |
ddaec666 | 371 | |
3164123a DM |
372 | $self->{dns_resolver} = Net::DNS::Resolver->new(%dnsargs); |
373 | ||
374 | $self->{spf_server} = Mail::SPF::Server->new( | |
375 | hostname => $self->{fqdn}, dns_resolver => $self->{dns_resolver}); | |
376 | }; | |
377 | if (my $err = $@) { | |
b902c0b8 | 378 | $self->log(0, $err); |
3164123a DM |
379 | $self->child_finish_hook; |
380 | exit(-1); | |
381 | } | |
382 | ||
383 | $SIG{'USR1'} = sub { | |
384 | $self->{reload_config} = 1; | |
385 | } | |
ddaec666 DM |
386 | } |
387 | ||
388 | sub child_finish_hook { | |
3164123a | 389 | my $self = shift; |
ddaec666 | 390 | |
3164123a | 391 | my $prop = $self->{server}; |
ddaec666 | 392 | |
3164123a DM |
393 | $self->{ruledb}->close() if $self->{ruledb}; |
394 | } | |
ddaec666 DM |
395 | |
396 | sub get_spf_result { | |
397 | my ($self, $instance, $ip, $helo, $sender) = @_; | |
398 | ||
399 | my $result; | |
400 | my $spf_header; | |
401 | my $local_expl; | |
402 | my $auth_expl; | |
403 | ||
404 | # we only use helo tests when we have no sender, | |
3164123a | 405 | # helo is sometimes empty, so we cant use SPF helo tests |
ddaec666 DM |
406 | # in that case - strange |
407 | if ($helo && !$sender) { | |
408 | my $query; | |
409 | ||
3164123a | 410 | if (defined ($self->{cache}->{$instance}) && |
ddaec666 DM |
411 | defined ($self->{cache}->{$instance}->{spf_helo_result})) { |
412 | ||
413 | $query = $self->{cache}->{$instance}->{spf_helo_result}; | |
414 | ||
415 | } else { | |
3164123a DM |
416 | my $request = Mail::SPF::Request->new( |
417 | scope => 'helo', identity => $helo, ip_address => $ip); | |
418 | ||
419 | $query = $self->{cache}->{$instance}->{spf_helo_result} = | |
ddaec666 DM |
420 | $self->{spf_server}->process ($request); |
421 | } | |
422 | ||
423 | $result = $query->code; | |
424 | $spf_header = $query->received_spf_header; | |
425 | $local_expl = $query->local_explanation; | |
426 | $auth_expl = $query->authority_explanation if $query->is_code('fail'); | |
427 | ||
428 | # return if we get a definitive result | |
429 | if ($result eq 'pass' || $result eq 'fail' || $result eq 'temperror') { | |
430 | return ($result, $spf_header, $local_expl, $auth_expl); | |
431 | } | |
432 | } | |
433 | ||
434 | if ($sender) { | |
435 | ||
436 | my $query; | |
437 | ||
3164123a | 438 | if (defined ($self->{cache}->{$instance}) && |
ddaec666 | 439 | defined ($self->{cache}->{$instance}->{spf_mfrom_result})) { |
3164123a | 440 | |
ddaec666 DM |
441 | $query = $self->{cache}->{$instance}->{spf_mfrom_result}; |
442 | ||
443 | } else { | |
444 | ||
3164123a DM |
445 | my $request = Mail::SPF::Request->new( |
446 | scope => 'mfrom', identity => $sender, | |
447 | ip_address => $ip, helo_identity => $helo); | |
448 | ||
ddaec666 DM |
449 | $query = $self->{cache}->{$instance}->{spf_mfrom_result} = |
450 | $self->{spf_server}->process($request); | |
451 | } | |
452 | ||
453 | $result = $query->code; | |
454 | $spf_header = $query->received_spf_header; | |
455 | $local_expl = $query->local_explanation; | |
456 | $auth_expl = $query->authority_explanation if $query->is_code('fail'); | |
457 | ||
458 | return ($result, $spf_header, $local_expl, $auth_expl); | |
459 | } | |
460 | ||
461 | return undef; | |
462 | } | |
463 | ||
464 | sub is_backup_mx { | |
465 | my ($self, $ip, $receiver) = @_; | |
466 | ||
467 | my ($rdomain) = $receiver =~ /([^@]+)$/; | |
468 | ||
469 | my $dkey = "BKMX:$rdomain"; | |
470 | ||
471 | if (defined ($self->{cache}->{$dkey}) && | |
472 | ($self->{cache}->{$dkey}->{status} == 1)) { | |
473 | return $self->{cache}->{$dkey}->{$ip}; | |
474 | } | |
475 | ||
476 | my $resolver = $self->{dns_resolver}; | |
477 | ||
3164123a | 478 | if (my $mx = $resolver->send($rdomain, 'MX')) { |
ddaec666 DM |
479 | $self->{cache}->{$dkey}->{status} = 1; |
480 | my @mxa = grep { $_->type eq 'MX' } $mx->answer; | |
481 | my @mxl = sort { $a->preference <=> $b->preference } @mxa; | |
482 | # shift @mxl; # optionaly skip primary MX ? | |
483 | foreach my $rr (@mxl) { | |
484 | my $a = $resolver->send ($rr->exchange, 'A'); | |
485 | if ($a) { | |
486 | foreach my $rra ($a->answer) { | |
487 | if ($rra->type eq 'A') { | |
488 | $self->{cache}->{$dkey}->{$rra->address} = 1; | |
489 | } | |
490 | } | |
491 | } | |
492 | } | |
493 | } else { | |
494 | $self->{cache}->{$dkey}->{status} = 0; | |
495 | } | |
496 | ||
497 | return $self->{cache}->{$dkey}->{$ip}; | |
498 | } | |
499 | ||
500 | sub greylist_value { | |
501 | my ($self, $ctime, $helo, $ip, $sender, $rcpt, $instance) = @_; | |
502 | ||
503 | my $rulecache = $self->{rulecache}; | |
504 | ||
505 | my $dbh = $self->{ruledb}->{dbh}; | |
506 | ||
507 | # try to reconnect if database connection is broken | |
508 | if (!$dbh->ping) { | |
3164123a | 509 | $self->log(0, 'Database connection broken - trying to reconnect'); |
ddaec666 DM |
510 | my $dbh; |
511 | eval { | |
3164123a | 512 | $dbh = PMG::DBTools::open_ruledb($database); |
ddaec666 DM |
513 | }; |
514 | my $err = $@; | |
515 | if ($err) { | |
b902c0b8 | 516 | $self->log(0, "unable to reconnect to database server: $err"); |
ddaec666 DM |
517 | return 'dunno'; |
518 | } | |
3164123a | 519 | $self->{ruledb} = PMG::RuleDB->new($dbh); |
ddaec666 DM |
520 | } |
521 | ||
522 | # some sender substitutions | |
523 | my ($user, $domain) = split('@', $sender, 2); | |
524 | if (defined ($user) && defined ($domain)) { | |
525 | # see http://cr.yp.to/proto/verp.txt | |
526 | $user =~ s/\+.*//; # strip extensions (mailing-list VERP) | |
527 | $user =~ s/\b\d+\b/#/g; #replace nubmers in VERP address | |
528 | $sender = "$user\@$domain"; | |
529 | } | |
530 | ||
3164123a DM |
531 | if ($self->is_backup_mx($ip, $rcpt)) { |
532 | $self->log(3, "accept mails from backup MX host - $ip"); | |
ddaec666 DM |
533 | return 'dunno'; |
534 | } | |
535 | ||
536 | # greylist exclusion (sender whitelist) | |
537 | if ($rulecache->greylist_match ($sender, $ip)) { | |
3164123a | 538 | $self->log(3, "accept mails from whitelist - $ip"); |
ddaec666 DM |
539 | return 'dunno'; |
540 | } | |
541 | ||
ddaec666 DM |
542 | # greylist exclusion (receiver whitelist) |
543 | if ($rulecache->greylist_match_receiver ($rcpt)) { | |
3164123a | 544 | $self->log(3, "accept mails to whitelist - <$rcpt>"); |
ddaec666 DM |
545 | return 'dunno'; |
546 | } | |
547 | ||
548 | my ($net, $host) = $ip =~ m/(\d+\.\d+\.\d+)\.(\d+)/; | |
549 | my $spf_header; | |
550 | ||
3164123a | 551 | if ((!$opt_testmode && $self->{use_spf}) || |
ddaec666 DM |
552 | ($opt_testmode && ($rcpt =~ m/^testspf/))) { |
553 | ||
554 | # ask SPF | |
555 | my $spf_result; | |
556 | my $local_expl, | |
557 | my $auth_expl; | |
558 | ||
559 | my $previous_alarm; | |
560 | ||
561 | my ($result, $smtp_comment, $header_comment); | |
562 | ||
563 | eval { | |
3164123a | 564 | $previous_alarm = alarm(10); |
ddaec666 | 565 | local $SIG{ALRM} = sub { die "SPF timeout\n" }; |
3164123a DM |
566 | |
567 | ($result, $spf_header, $local_expl, $auth_expl) = | |
568 | $self->get_spf_result($instance, $ip, $helo, $sender); | |
569 | ||
570 | alarm(0); # avoid race condition | |
ddaec666 | 571 | }; |
ddaec666 DM |
572 | my $err = $@; |
573 | ||
3164123a | 574 | alarm($previous_alarm) if defined($previous_alarm); |
ddaec666 DM |
575 | |
576 | if ($err) { | |
577 | $err = $err->text if UNIVERSAL::isa ($err, 'Mail::SPF::Exception'); | |
b902c0b8 | 578 | $self->log (0, $err); |
ddaec666 DM |
579 | } else { |
580 | ||
581 | if ($result && $result eq 'pass') { | |
3164123a | 582 | $self->log(3, "SPF says $result"); |
ddaec666 DM |
583 | $spf_result = $spf_header ? "prepend $spf_header" : 'dunno'; |
584 | } | |
3164123a | 585 | |
ddaec666 | 586 | if ($result && $result eq 'fail') { |
3164123a DM |
587 | $self->log(3, "SPF says $result"); |
588 | $spf_result = "reject ${auth_expl}"; | |
589 | ||
ddaec666 DM |
590 | eval { |
591 | ||
592 | $dbh->begin_work; | |
593 | ||
594 | # try to avoid locks everywhere - we use merge instead of insert | |
595 | #$dbh->do ("LOCK TABLE CGreylist IN ROW EXCLUSIVE MODE"); | |
3164123a | 596 | |
ddaec666 | 597 | # check if there is already a record in the GL database |
3164123a DM |
598 | my $sth = $dbh->prepare( |
599 | "SELECT * FROM CGreylist " . | |
600 | "where IPNet = ? AND Sender = ? AND Receiver = ?"); | |
ddaec666 | 601 | |
3164123a | 602 | $sth->execute($net, $sender, $rcpt); |
ddaec666 DM |
603 | my $ref = $sth->fetchrow_hashref(); |
604 | $sth->finish(); | |
605 | ||
606 | # else add an entry to the GL Database with short | |
3164123a | 607 | # expiration time. run_dequeue() moves those entries into the statistic |
ddaec666 DM |
608 | # table later. We set 'blocked' to 100000 to identify those entries. |
609 | ||
3164123a | 610 | if (!defined($ref->{rctime})) { |
ddaec666 | 611 | |
2e049252 | 612 | $dbh->do($PMG::DBTools::cgreylist_merge_sql, undef, |
3164123a DM |
613 | $net, $host, $sender, $rcpt, $instance, |
614 | $ctime, $ctime + 10, 0, 100000, 0, $ctime, $self->{lcid}); | |
ddaec666 DM |
615 | } |
616 | ||
617 | $dbh->commit; | |
618 | }; | |
3164123a | 619 | if (my $err = $@) { |
ddaec666 | 620 | $dbh->rollback; |
b902c0b8 | 621 | $self->log(0, $err); |
ddaec666 DM |
622 | } |
623 | } | |
624 | } | |
625 | ||
626 | return $spf_result if $spf_result; | |
627 | } | |
628 | ||
629 | ||
fd218150 DM |
630 | my $res = 'dunno'; |
631 | ||
632 | # add spf_header once - SA can re-use this information | |
633 | if (!defined($self->{cache}->{$instance}) || | |
634 | !$self->{cache}->{$instance}->{spf_header_added}) { | |
635 | $res = "prepend $spf_header" if $spf_header; | |
636 | $self->{cache}->{$instance}->{spf_header_added} = 1; | |
637 | } | |
ddaec666 DM |
638 | |
639 | return $res if !$self->{use_greylist}; | |
640 | ||
3164123a DM |
641 | my $defer_res = "defer_if_permit Service is unavailable (try later)"; |
642 | ||
ddaec666 DM |
643 | eval { |
644 | ||
645 | # we dont use alarm here, because it does not work with DBI | |
646 | ||
647 | $dbh->begin_work; | |
648 | ||
649 | # try to avoid locks everywhere - we use merge instead of insert | |
650 | #$dbh->do ("LOCK TABLE CGreylist IN ROW EXCLUSIVE MODE"); | |
651 | ||
3164123a DM |
652 | my $sth = $dbh->prepare( |
653 | "SELECT * FROM CGreylist " . | |
654 | "where IPNet = ? AND Sender = ? AND Receiver = ?"); | |
655 | ||
656 | $sth->execute($net, $sender, $rcpt); | |
ddaec666 | 657 | |
ddaec666 DM |
658 | my $ref = $sth->fetchrow_hashref(); |
659 | ||
660 | $sth->finish(); | |
661 | ||
3164123a | 662 | if (!defined($ref->{rctime})) { |
ddaec666 | 663 | |
2e049252 DM |
664 | $dbh->do($PMG::DBTools::cgreylist_merge_sql, undef, |
665 | $net, $host, $sender, $rcpt, $instance, | |
666 | $ctime, $ctime + $greylist_lifetime, 0, 1, 0, $ctime, $self->{lcid}); | |
ddaec666 DM |
667 | |
668 | $res = $defer_res; | |
3164123a | 669 | $self->log(3, "defer greylisted mail"); |
ddaec666 | 670 | } else { |
3164123a | 671 | my $age = $ctime - $ref->{rctime}; |
ddaec666 DM |
672 | |
673 | if ($age < $greylist_delay) { | |
674 | # defer (resent within greylist_delay window) | |
675 | $res = $defer_res; | |
3164123a DM |
676 | $self->log(3, "defer greylisted mail"); |
677 | $dbh->do("UPDATE CGreylist " . | |
678 | "SET Blocked = Blocked + 1, Host = ?, MTime = ? " . | |
679 | "WHERE IPNet = ? AND Sender = ? AND Receiver = ?", undef, | |
680 | $host, $ctime, $net, $sender, $rcpt); | |
ddaec666 DM |
681 | } else { |
682 | if ($ctime < $ref->{extime}) { | |
683 | # accept (not expired) | |
684 | my $lifetime = $sender eq "" ? 0 : $greylist_awlifetime; | |
685 | my $delay = $ref->{passed} ? "" : "Delay = $age, "; | |
3164123a DM |
686 | $dbh->do("UPDATE CGreylist " . |
687 | "SET Passed = Passed + 1, $delay Host = ?, ExTime = ?, MTime = ? " . | |
688 | "WHERE IPNet = ? AND Sender = ? AND Receiver = ?", undef, | |
689 | $host, $ctime + $lifetime, $ctime, $net, $sender, $rcpt); | |
ddaec666 DM |
690 | } else { |
691 | # defer (record is expired) | |
692 | $res = $defer_res; | |
3164123a DM |
693 | $dbh->do("UPDATE CGreylist " . |
694 | "SET Host = ?, RCTime = ?, ExTime = ?, MTime = ?, Instance = ?, " . | |
695 | "Blocked = 1, Passed = 0 " . | |
696 | "WHERE IPNet = ? AND Sender = ? AND Receiver = ?", undef, | |
697 | $host, $ctime, $ctime + $greylist_lifetime, $ctime, $instance, | |
698 | $net, $sender, $rcpt); | |
ddaec666 | 699 | } |
3164123a | 700 | } |
ddaec666 DM |
701 | } |
702 | ||
703 | $dbh->commit; | |
704 | }; | |
3164123a DM |
705 | if (my $err = $@) { |
706 | $dbh->rollback; | |
b902c0b8 | 707 | $self->log (0, $err); |
ddaec666 DM |
708 | } |
709 | ||
710 | return $res; | |
711 | } | |
712 | ||
3164123a | 713 | # shutdown connections: we need this - else file handles are |
ddaec666 DM |
714 | # not closed and we run out of handles |
715 | sub mux_eof { | |
716 | my ($self, $mux, $fh) = @_; | |
717 | ||
718 | $mux->shutdown($fh, 1); | |
719 | } | |
720 | ||
c196a54a DM |
721 | |
722 | my $last_reload_test = 0; | |
723 | my $last_confid_version; | |
724 | my (undef, $pmgconffilename) = PVE::INotify::ccache_info('pmg.conf'); | |
725 | sub test_config_version { | |
726 | ||
727 | my $ctime = time(); | |
728 | ||
729 | if (($ctime - $last_reload_test) < 5) { return 0; } | |
730 | ||
731 | $last_reload_test = $ctime; | |
732 | ||
733 | my $version = PVE::INotify::poll_changes($pmgconffilename); | |
734 | ||
735 | if (!defined($last_confid_version) || | |
736 | $last_confid_version != $version) { | |
737 | $last_confid_version = $version; | |
738 | return 1; | |
739 | } | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
ddaec666 DM |
744 | sub mux_input { |
745 | my ($self, $mux, $fh, $dataref) = @_; | |
746 | my $prop = $self->{server}; | |
3164123a | 747 | |
ddaec666 DM |
748 | my $attribute = {}; |
749 | ||
750 | eval { | |
c196a54a | 751 | $self->{reload_config} = 1 if test_config_version(); |
3164123a | 752 | $self->load_config() if $self->{reload_config}; |
ddaec666 DM |
753 | |
754 | while ($$dataref =~ s/^([^\r\n]*)\r?\n//) { | |
755 | my $line = $1; | |
756 | next if !defined ($line); | |
757 | ||
758 | if ($line =~ m/([^=]+)=(.*)/) { | |
759 | $attribute->{substr($1, 0, 255)} = substr($2, 0, 255); | |
3164123a | 760 | } elsif ($line eq '') { |
ddaec666 DM |
761 | my $res = 'dunno'; |
762 | my $ctime = time; | |
763 | ||
764 | if ($opt_testmode) { | |
765 | die "undefined test time :ERROR" if !defined $attribute->{testtime}; | |
766 | $ctime = $attribute->{testtime}; | |
767 | } | |
768 | ||
3164123a | 769 | if ($attribute->{instance} && $attribute->{recipient} && |
ddaec666 DM |
770 | $attribute->{client_address} && $attribute->{request} && |
771 | $attribute->{request} eq 'smtpd_access_policy') { | |
3164123a | 772 | |
ddaec666 | 773 | eval { |
3164123a DM |
774 | |
775 | $res = $self->greylist_value( | |
776 | $ctime, | |
777 | lc ($attribute->{helo_name}), | |
778 | lc ($attribute->{client_address}), | |
779 | lc ($attribute->{sender}), | |
780 | lc ($attribute->{recipient}), | |
781 | lc ($attribute->{instance})); | |
ddaec666 | 782 | }; |
3164123a | 783 | if (my $err = $@) { |
b902c0b8 | 784 | $self->log(0, $err); |
3164123a | 785 | } |
ddaec666 DM |
786 | } |
787 | ||
788 | print $fh "action=$res\n\n"; | |
789 | ||
790 | $attribute = {}; | |
791 | } else { | |
3164123a | 792 | $self->log(0, "greylist policy protocol error - got '%s'", $line); |
ddaec666 DM |
793 | } |
794 | } | |
795 | }; | |
3164123a | 796 | my $err = $@; |
ddaec666 DM |
797 | |
798 | # remove remaining data, if any | |
799 | if ($$dataref ne '') { | |
3164123a | 800 | $self->log(0, "greylist policy protocol error - unused data '%s'", $$dataref); |
ddaec666 DM |
801 | $$dataref = ''; |
802 | } | |
803 | ||
b902c0b8 | 804 | $self->log(0, $err) if $err; |
ddaec666 DM |
805 | } |
806 | ||
807 | sub restart_close_hook { | |
3164123a | 808 | my $self = shift; |
ddaec666 | 809 | |
3164123a DM |
810 | my $sig_set = POSIX::SigSet->new; |
811 | $sig_set->addset(&POSIX::SIGHUP); | |
812 | $sig_set->addset(&POSIX::SIGCHLD); # to avoid zombies | |
813 | my $old_sig_set = POSIX::SigSet->new(); | |
ddaec666 | 814 | |
3164123a | 815 | sigprocmask(SIG_BLOCK, $sig_set, $old_sig_set); |
ddaec666 DM |
816 | } |
817 | ||
818 | sub pre_server_close_hook { | |
3164123a DM |
819 | my $self = shift; |
820 | ||
821 | my $prop = $self->{server}; | |
ddaec666 | 822 | |
3164123a DM |
823 | if (defined $prop->{_HUP}) { |
824 | undef $prop->{pid_file_unlink}; | |
825 | } | |
08f49442 DM |
826 | |
827 | if (defined $prop->{children}) { | |
828 | foreach my $pid (keys %{$prop->{children}}) { | |
829 | kill(1, $pid); # HUP childs | |
830 | } | |
831 | } | |
832 | ||
833 | # nicely shutdown childs (give them max 30 seconds to shut down) | |
834 | my $previous_alarm = alarm(30); | |
835 | eval { | |
836 | local $SIG{ALRM} = sub { die "Timed Out!\n" }; | |
837 | ||
838 | my $pid; | |
839 | 1 while ((($pid = waitpid(-1, 0)) > 0) || ($! == EINTR)); | |
840 | ||
841 | alarm(0); # avoid race | |
842 | }; | |
843 | alarm ($previous_alarm); | |
ddaec666 DM |
844 | } |
845 | ||
846 | sub setup_fork_signal_mask { | |
847 | my $block = shift; | |
848 | ||
849 | my $sig_set = POSIX::SigSet->new; | |
3164123a DM |
850 | $sig_set->addset(&POSIX::SIGINT); |
851 | $sig_set->addset(&POSIX::SIGTERM); | |
852 | $sig_set->addset(&POSIX::SIGQUIT); | |
853 | $sig_set->addset(&POSIX::SIGHUP); | |
ddaec666 DM |
854 | my $old_sig_set = POSIX::SigSet->new(); |
855 | ||
856 | if ($block) { | |
857 | sigprocmask (SIG_BLOCK, $sig_set, $old_sig_set); | |
858 | } else { | |
859 | sigprocmask (SIG_UNBLOCK, $sig_set, $old_sig_set); | |
860 | } | |
861 | } | |
862 | ||
863 | # subroutine to start up a specified number of children. | |
864 | # We need to block signals until handlers are set up correctly. | |
3164123a DM |
865 | # Else its possible that HUP occurs after fork, which triggers |
866 | # singal TERM at childs and calls server_close() instead of | |
ddaec666 DM |
867 | # simply exit the child. |
868 | # Note: on server startup signals are setup to trigger | |
869 | # asynchronously for a short period of time (in PreForkSimple]::loop, | |
3164123a | 870 | # run_n_children is called before run_parent) |
ddaec666 | 871 | # Net::Server::PreFork does not have this problem, because it is using |
3164123a | 872 | # signal HUP stop children |
ddaec666 | 873 | sub run_n_children { |
3164123a DM |
874 | my ($self, $n) = @_; |
875 | ||
ddaec666 | 876 | my $prop = $self->{server}; |
ddaec666 | 877 | |
3164123a DM |
878 | setup_fork_signal_mask(1); # block signals |
879 | ||
880 | $self->SUPER::run_n_children($n); | |
ddaec666 | 881 | |
3164123a | 882 | setup_fork_signal_mask(0); # unblocking signals for parent |
ddaec666 DM |
883 | } |
884 | ||
3164123a | 885 | # test sig_hup with: for ((;;)) ;do kill -HUP `cat /var/run/pmgpolicy.pid`; done; |
ddaec666 DM |
886 | # wrapper to avoid multiple calls to sig_hup |
887 | sub sig_hup { | |
3164123a DM |
888 | my $self = shift; |
889 | ||
890 | my $prop = $self->{server}; | |
ddaec666 | 891 | |
3164123a | 892 | return if defined($prop->{_HUP}); # do not call twice |
ddaec666 | 893 | |
3164123a | 894 | $self->SUPER::sig_hup(); |
ddaec666 DM |
895 | } |
896 | ||
897 | ### child process which will accept on the port | |
898 | sub run_child { | |
3164123a | 899 | my $self = shift; |
ddaec666 | 900 | |
3164123a | 901 | my $prop = $self->{server}; |
ddaec666 | 902 | |
3164123a | 903 | $self->log(4, "Child Preforked ($$)\n"); |
ddaec666 | 904 | |
3164123a DM |
905 | # set correct signal handlers before enabling signals again |
906 | $SIG{INT} = $SIG{TERM} = $SIG{QUIT} = $SIG{HUP} = sub { | |
907 | $self->child_finish_hook; | |
908 | exit; | |
909 | }; | |
ddaec666 | 910 | |
3164123a | 911 | delete $prop->{children}; |
ddaec666 | 912 | |
3164123a | 913 | $self->child_init_hook; |
ddaec666 | 914 | |
3164123a | 915 | # accept connections |
ddaec666 | 916 | |
3164123a | 917 | my $sock = $prop->{sock}->[0]; |
ddaec666 | 918 | |
3164123a DM |
919 | # make sure we got a good sock |
920 | if (!defined ($sock)){ | |
921 | $self->log(0, "ERROR: Received a bad socket"); | |
922 | exit (-1); | |
923 | } | |
924 | ||
925 | # sometimes the socket is not usable, don't know why | |
926 | my $flags = fcntl($sock, F_GETFL, 0); | |
927 | if (!$flags) { | |
b902c0b8 | 928 | $self->log(0, "socket not ready - $!"); |
3164123a DM |
929 | exit (-1); |
930 | } | |
ddaec666 | 931 | |
3164123a DM |
932 | # cache is limited, because postfix does max. 100 queries |
933 | $self->{cache} = {}; | |
ddaec666 | 934 | |
3164123a DM |
935 | eval { |
936 | my $mux = $self->{mux}; | |
937 | $mux->listen ($sock); | |
938 | $mux->loop; | |
939 | }; | |
940 | if (my $err = $@) { | |
b902c0b8 | 941 | $self->log(0, "ERROR: $err"); |
3164123a | 942 | } |
ddaec666 | 943 | |
3164123a | 944 | $self->child_finish_hook; |
ddaec666 | 945 | |
3164123a | 946 | exit; |
ddaec666 DM |
947 | } |
948 | ||
3164123a DM |
949 | my $syslog_map = { |
950 | 0 => 'err', | |
951 | 1 => 'warning', | |
952 | 2 => 'notice', | |
953 | 3 => 'info', | |
954 | 4 => 'debug' | |
955 | }; | |
956 | ||
ddaec666 DM |
957 | sub log { |
958 | my ($self, $level, $msg, @therest) = @_; | |
3164123a | 959 | |
ddaec666 DM |
960 | my $prop = $self->{server}; |
961 | ||
962 | return if $level =~ /^\d+$/ && $level > $prop->{log_level}; | |
963 | ||
3164123a | 964 | $level = $syslog_map->{$level} || $level; |
ddaec666 DM |
965 | if (@therest) { |
966 | syslog($level, $msg, @therest); | |
967 | } else { | |
968 | syslog ($level, $msg); | |
969 | } | |
970 | } | |
971 | ||
972 | my $server = bless { | |
973 | server => $server_attr, | |
974 | }; | |
975 | ||
976 | $server->sig_chld(); # avoid zombies after restart | |
977 | ||
978 | $server->run (); | |
979 | ||
980 | exit (0); | |
981 | ||
982 | __END__ | |
983 | ||
984 | =head1 NAME | |
3164123a DM |
985 | |
986 | pmgpolicy - The Proxmox policy daemon | |
ddaec666 DM |
987 | |
988 | =head1 SYNOPSIS | |
989 | ||
3164123a | 990 | pmgpolicy |
ddaec666 DM |
991 | |
992 | =head1 DESCRIPTION | |
993 | ||
994 | Documentation is available at www.proxmox.com |